drivers/bluetooth/hci_qca.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Bluetooth Software UART Qualcomm protocol
   4  *
   5  *  HCI_IBS (HCI In-Band Sleep) is Qualcomm's power management
   6  *  protocol extension to H4.
   7  *
   8  *  Copyright (C) 2007 Texas Instruments, Inc.
   9  *  Copyright (c) 2010, 2012, 2018 The Linux Foundation. All rights reserved.
  10  *
  11  *  Acknowledgements:
  12  *  This file is based on hci_ll.c, which was...
  13  *  Written by Ohad Ben-Cohen <[email protected]>
  14  *  which was in turn based on hci_h4.c, which was written
  15  *  by Maxim Krasnyansky and Marcel Holtmann.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/clk.h>
  20 #include <linux/completion.h>
  21 #include <linux/debugfs.h>
  22 #include <linux/delay.h>
  23 #include <linux/devcoredump.h>
  24 #include <linux/device.h>
  25 #include <linux/gpio/consumer.h>
  26 #include <linux/mod_devicetable.h>
  27 #include <linux/module.h>
  28 #include <linux/of.h>
  29 #include <linux/acpi.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/pwrseq/consumer.h>
  32 #include <linux/regulator/consumer.h>
  33 #include <linux/serdev.h>
  34 #include <linux/mutex.h>
  35 #include <asm/unaligned.h>
  36
  37 #include <net/bluetooth/bluetooth.h>
  38 #include <net/bluetooth/hci_core.h>
  39
  40 #include "hci_uart.h"
  41 #include "btqca.h"
  42
  43 /* HCI_IBS protocol messages */
  44 #define HCI_IBS_SLEEP_IND       0xFE
  45 #define HCI_IBS_WAKE_IND        0xFD
  46 #define HCI_IBS_WAKE_ACK        0xFC
  47 #define HCI_MAX_IBS_SIZE        10
  48
  49 #define IBS_WAKE_RETRANS_TIMEOUT_MS     100
  50 #define IBS_BTSOC_TX_IDLE_TIMEOUT_MS    200
  51 #define IBS_HOST_TX_IDLE_TIMEOUT_MS     2000
  52 #define CMD_TRANS_TIMEOUT_MS            100
  53 #define MEMDUMP_TIMEOUT_MS              8000
  54 #define IBS_DISABLE_SSR_TIMEOUT_MS \
  55         (MEMDUMP_TIMEOUT_MS + FW_DOWNLOAD_TIMEOUT_MS)
  56 #define FW_DOWNLOAD_TIMEOUT_MS          3000
  57
  58 /* susclk rate */
  59 #define SUSCLK_RATE_32KHZ       32768
  60
  61 /* Controller debug log header */
  62 #define QCA_DEBUG_HANDLE        0x2EDC
  63
  64 /* max retry count when init fails */
  65 #define MAX_INIT_RETRIES 3
  66
  67 /* Controller dump header */
  68 #define QCA_SSR_DUMP_HANDLE             0x0108
  69 #define QCA_DUMP_PACKET_SIZE            255
  70 #define QCA_LAST_SEQUENCE_NUM           0xFFFF
  71 #define QCA_CRASHBYTE_PACKET_LEN        1096
  72 #define QCA_MEMDUMP_BYTE                0xFB
  73
  74 enum qca_flags {
  75         QCA_IBS_DISABLED,
  76         QCA_DROP_VENDOR_EVENT,
  77         QCA_SUSPENDING,
  78         QCA_MEMDUMP_COLLECTION,
  79         QCA_HW_ERROR_EVENT,
  80         QCA_SSR_TRIGGERED,
  81         QCA_BT_OFF,
  82         QCA_ROM_FW,
  83         QCA_DEBUGFS_CREATED,
  84 };
  85
  86 enum qca_capabilities {
  87         QCA_CAP_WIDEBAND_SPEECH = BIT(0),
  88         QCA_CAP_VALID_LE_STATES = BIT(1),
  89 };
  90
  91 /* HCI_IBS transmit side sleep protocol states */
  92 enum tx_ibs_states {
  93         HCI_IBS_TX_ASLEEP,
  94         HCI_IBS_TX_WAKING,
  95         HCI_IBS_TX_AWAKE,
  96 };
  97
  98 /* HCI_IBS receive side sleep protocol states */
  99 enum rx_states {
 100         HCI_IBS_RX_ASLEEP,
 101         HCI_IBS_RX_AWAKE,
 102 };
 103
 104 /* HCI_IBS transmit and receive side clock state vote */
 105 enum hci_ibs_clock_state_vote {
 106         HCI_IBS_VOTE_STATS_UPDATE,
 107         HCI_IBS_TX_VOTE_CLOCK_ON,
 108         HCI_IBS_TX_VOTE_CLOCK_OFF,
 109         HCI_IBS_RX_VOTE_CLOCK_ON,
 110         HCI_IBS_RX_VOTE_CLOCK_OFF,
 111 };
 112
 113 /* Controller memory dump states */
 114 enum qca_memdump_states {
 115         QCA_MEMDUMP_IDLE,
 116         QCA_MEMDUMP_COLLECTING,
 117         QCA_MEMDUMP_COLLECTED,
 118         QCA_MEMDUMP_TIMEOUT,
 119 };
 120
 121 struct qca_memdump_info {
 122         u32 current_seq_no;
 123         u32 received_dump;
 124         u32 ram_dump_size;
 125 };
 126
 127 struct qca_memdump_event_hdr {
 128         __u8    evt;
 129         __u8    plen;
 130         __u16   opcode;
 131         __le16   seq_no;
 132         __u8    reserved;
 133 } __packed;
 134
 135
 136 struct qca_dump_size {
 137         __le32 dump_size;
 138 } __packed;
 139
 140 struct qca_data {
 141         struct hci_uart *hu;
 142         struct sk_buff *rx_skb;
 143         struct sk_buff_head txq;
 144         struct sk_buff_head tx_wait_q;  /* HCI_IBS wait queue   */
 145         struct sk_buff_head rx_memdump_q;       /* Memdump wait queue   */
 146         spinlock_t hci_ibs_lock;        /* HCI_IBS state lock   */
 147         u8 tx_ibs_state;        /* HCI_IBS transmit side power state*/
 148         u8 rx_ibs_state;        /* HCI_IBS receive side power state */
 149         bool tx_vote;           /* Clock must be on for TX */
 150         bool rx_vote;           /* Clock must be on for RX */
 151         struct timer_list tx_idle_timer;
 152         u32 tx_idle_delay;
 153         struct timer_list wake_retrans_timer;
 154         u32 wake_retrans;
 155         struct workqueue_struct *workqueue;
 156         struct work_struct ws_awake_rx;
 157         struct work_struct ws_awake_device;
 158         struct work_struct ws_rx_vote_off;
 159         struct work_struct ws_tx_vote_off;
 160         struct work_struct ctrl_memdump_evt;
 161         struct delayed_work ctrl_memdump_timeout;
 162         struct qca_memdump_info *qca_memdump;
 163         unsigned long flags;
 164         struct completion drop_ev_comp;
 165         wait_queue_head_t suspend_wait_q;
 166         enum qca_memdump_states memdump_state;
 167         struct mutex hci_memdump_lock;
 168
 169         u16 fw_version;
 170         u16 controller_id;
 171         /* For debugging purpose */
 172         u64 ibs_sent_wacks;
 173         u64 ibs_sent_slps;
 174         u64 ibs_sent_wakes;
 175         u64 ibs_recv_wacks;
 176         u64 ibs_recv_slps;
 177         u64 ibs_recv_wakes;
 178         u64 vote_last_jif;
 179         u32 vote_on_ms;
 180         u32 vote_off_ms;
 181         u64 tx_votes_on;
 182         u64 rx_votes_on;
 183         u64 tx_votes_off;
 184         u64 rx_votes_off;
 185         u64 votes_on;
 186         u64 votes_off;
 187 };
 188
 189 enum qca_speed_type {
 190         QCA_INIT_SPEED = 1,
 191         QCA_OPER_SPEED
 192 };
 193
 194 /*
 195  * Voltage regulator information required for configuring the
 196  * QCA Bluetooth chipset
 197  */
 198 struct qca_vreg {
 199         const char *name;
 200         unsigned int load_uA;
 201 };
 202
 203 struct qca_device_data {
 204         enum qca_btsoc_type soc_type;
 205         struct qca_vreg *vregs;
 206         size_t num_vregs;
 207         uint32_t capabilities;
 208 };
 209
 210 /*
 211  * Platform data for the QCA Bluetooth power driver.
 212  */
 213 struct qca_power {
 214         struct device *dev;
 215         struct regulator_bulk_data *vreg_bulk;
 216         int num_vregs;
 217         bool vregs_on;
 218         struct pwrseq_desc *pwrseq;
 219 };
 220
 221 struct qca_serdev {
 222         struct hci_uart  serdev_hu;
 223         struct gpio_desc *bt_en;
 224         struct gpio_desc *sw_ctrl;
 225         struct clk       *susclk;
 226         enum qca_btsoc_type btsoc_type;
 227         struct qca_power *bt_power;
 228         u32 init_speed;
 229         u32 oper_speed;
 230         bool bdaddr_property_broken;
 231         const char *firmware_name;
 232 };
 233
 234 static int qca_regulator_enable(struct qca_serdev *qcadev);
 235 static void qca_regulator_disable(struct qca_serdev *qcadev);
 236 static void qca_power_shutdown(struct hci_uart *hu);
 237 static int qca_power_off(struct hci_dev *hdev);
 238 static void qca_controller_memdump(struct work_struct *work);
 239 static void qca_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb);
 240
 241 static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu)
 242 {
 243         enum qca_btsoc_type soc_type;
 244
 245         if (hu->serdev) {
 246                 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
 247
 248                 soc_type = qsd->btsoc_type;
 249         } else {
 250                 soc_type = QCA_ROME;
 251         }
 252
 253         return soc_type;
 254 }
 255
 256 static const char *qca_get_firmware_name(struct hci_uart *hu)
 257 {
 258         if (hu->serdev) {
 259                 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
 260
 261                 return qsd->firmware_name;
 262         } else {
 263                 return NULL;
 264         }
 265 }
 266
 267 static void __serial_clock_on(struct tty_struct *tty)
 268 {
 269         /* TODO: Some chipset requires to enable UART clock on client
 270          * side to save power consumption or manual work is required.
 271          * Please put your code to control UART clock here if needed
 272          */
 273 }
 274
 275 static void __serial_clock_off(struct tty_struct *tty)
 276 {
 277         /* TODO: Some chipset requires to disable UART clock on client
 278          * side to save power consumption or manual work is required.
 279          * Please put your code to control UART clock off here if needed
 280          */
 281 }
 282
 283 /* serial_clock_vote needs to be called with the ibs lock held */
 284 static void serial_clock_vote(unsigned long vote, struct hci_uart *hu)
 285 {
 286         struct qca_data *qca = hu->priv;
 287         unsigned int diff;
 288
 289         bool old_vote = (qca->tx_vote | qca->rx_vote);
 290         bool new_vote;
 291
 292         switch (vote) {
 293         case HCI_IBS_VOTE_STATS_UPDATE:
 294                 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
 295
 296                 if (old_vote)
 297                         qca->vote_off_ms += diff;
 298                 else
 299                         qca->vote_on_ms += diff;
 300                 return;
 301
 302         case HCI_IBS_TX_VOTE_CLOCK_ON:
 303                 qca->tx_vote = true;
 304                 qca->tx_votes_on++;
 305                 break;
 306
 307         case HCI_IBS_RX_VOTE_CLOCK_ON:
 308                 qca->rx_vote = true;
 309                 qca->rx_votes_on++;
 310                 break;
 311
 312         case HCI_IBS_TX_VOTE_CLOCK_OFF:
 313                 qca->tx_vote = false;
 314                 qca->tx_votes_off++;
 315                 break;
 316
 317         case HCI_IBS_RX_VOTE_CLOCK_OFF:
 318                 qca->rx_vote = false;
 319                 qca->rx_votes_off++;
 320                 break;
 321
 322         default:
 323                 BT_ERR("Voting irregularity");
 324                 return;
 325         }
 326
 327         new_vote = qca->rx_vote | qca->tx_vote;
 328
 329         if (new_vote != old_vote) {
 330                 if (new_vote)
 331                         __serial_clock_on(hu->tty);
 332                 else
 333                         __serial_clock_off(hu->tty);
 334
 335                 BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false",
 336                        vote ? "true" : "false");
 337
 338                 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
 339
 340                 if (new_vote) {
 341                         qca->votes_on++;
 342                         qca->vote_off_ms += diff;
 343                 } else {
 344                         qca->votes_off++;
 345                         qca->vote_on_ms += diff;
 346                 }
 347                 qca->vote_last_jif = jiffies;
 348         }
 349 }
 350
 351 /* Builds and sends an HCI_IBS command packet.
 352  * These are very simple packets with only 1 cmd byte.
 353  */
 354 static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu)
 355 {
 356         int err = 0;
 357         struct sk_buff *skb = NULL;
 358         struct qca_data *qca = hu->priv;
 359
 360         BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd);
 361
 362         skb = bt_skb_alloc(1, GFP_ATOMIC);
 363         if (!skb) {
 364                 BT_ERR("Failed to allocate memory for HCI_IBS packet");
 365                 return -ENOMEM;
 366         }
 367
 368         /* Assign HCI_IBS type */
 369         skb_put_u8(skb, cmd);
 370
 371         skb_queue_tail(&qca->txq, skb);
 372
 373         return err;
 374 }
 375
 376 static void qca_wq_awake_device(struct work_struct *work)
 377 {
 378         struct qca_data *qca = container_of(work, struct qca_data,
 379                                             ws_awake_device);
 380         struct hci_uart *hu = qca->hu;
 381         unsigned long retrans_delay;
 382         unsigned long flags;
 383
 384         BT_DBG("hu %p wq awake device", hu);
 385
 386         /* Vote for serial clock */
 387         serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu);
 388
 389         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 390
 391         /* Send wake indication to device */
 392         if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0)
 393                 BT_ERR("Failed to send WAKE to device");
 394
 395         qca->ibs_sent_wakes++;
 396
 397         /* Start retransmit timer */
 398         retrans_delay = msecs_to_jiffies(qca->wake_retrans);
 399         mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
 400
 401         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 402
 403         /* Actually send the packets */
 404         hci_uart_tx_wakeup(hu);
 405 }
 406
 407 static void qca_wq_awake_rx(struct work_struct *work)
 408 {
 409         struct qca_data *qca = container_of(work, struct qca_data,
 410                                             ws_awake_rx);
 411         struct hci_uart *hu = qca->hu;
 412         unsigned long flags;
 413
 414         BT_DBG("hu %p wq awake rx", hu);
 415
 416         serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu);
 417
 418         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 419         qca->rx_ibs_state = HCI_IBS_RX_AWAKE;
 420
 421         /* Always acknowledge device wake up,
 422          * sending IBS message doesn't count as TX ON.
 423          */
 424         if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0)
 425                 BT_ERR("Failed to acknowledge device wake up");
 426
 427         qca->ibs_sent_wacks++;
 428
 429         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 430
 431         /* Actually send the packets */
 432         hci_uart_tx_wakeup(hu);
 433 }
 434
 435 static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work)
 436 {
 437         struct qca_data *qca = container_of(work, struct qca_data,
 438                                             ws_rx_vote_off);
 439         struct hci_uart *hu = qca->hu;
 440
 441         BT_DBG("hu %p rx clock vote off", hu);
 442
 443         serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu);
 444 }
 445
 446 static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work)
 447 {
 448         struct qca_data *qca = container_of(work, struct qca_data,
 449                                             ws_tx_vote_off);
 450         struct hci_uart *hu = qca->hu;
 451
 452         BT_DBG("hu %p tx clock vote off", hu);
 453
 454         /* Run HCI tx handling unlocked */
 455         hci_uart_tx_wakeup(hu);
 456
 457         /* Now that message queued to tty driver, vote for tty clocks off.
 458          * It is up to the tty driver to pend the clocks off until tx done.
 459          */
 460         serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
 461 }
 462
 463 static void hci_ibs_tx_idle_timeout(struct timer_list *t)
 464 {
 465         struct qca_data *qca = from_timer(qca, t, tx_idle_timer);
 466         struct hci_uart *hu = qca->hu;
 467         unsigned long flags;
 468
 469         BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state);
 470
 471         spin_lock_irqsave_nested(&qca->hci_ibs_lock,
 472                                  flags, SINGLE_DEPTH_NESTING);
 473
 474         switch (qca->tx_ibs_state) {
 475         case HCI_IBS_TX_AWAKE:
 476                 /* TX_IDLE, go to SLEEP */
 477                 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
 478                         BT_ERR("Failed to send SLEEP to device");
 479                         break;
 480                 }
 481                 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
 482                 qca->ibs_sent_slps++;
 483                 queue_work(qca->workqueue, &qca->ws_tx_vote_off);
 484                 break;
 485
 486         case HCI_IBS_TX_ASLEEP:
 487         case HCI_IBS_TX_WAKING:
 488         default:
 489                 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
 490                 break;
 491         }
 492
 493         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 494 }
 495
 496 static void hci_ibs_wake_retrans_timeout(struct timer_list *t)
 497 {
 498         struct qca_data *qca = from_timer(qca, t, wake_retrans_timer);
 499         struct hci_uart *hu = qca->hu;
 500         unsigned long flags, retrans_delay;
 501         bool retransmit = false;
 502
 503         BT_DBG("hu %p wake retransmit timeout in %d state",
 504                 hu, qca->tx_ibs_state);
 505
 506         spin_lock_irqsave_nested(&qca->hci_ibs_lock,
 507                                  flags, SINGLE_DEPTH_NESTING);
 508
 509         /* Don't retransmit the HCI_IBS_WAKE_IND when suspending. */
 510         if (test_bit(QCA_SUSPENDING, &qca->flags)) {
 511                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 512                 return;
 513         }
 514
 515         switch (qca->tx_ibs_state) {
 516         case HCI_IBS_TX_WAKING:
 517                 /* No WAKE_ACK, retransmit WAKE */
 518                 retransmit = true;
 519                 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {
 520                         BT_ERR("Failed to acknowledge device wake up");
 521                         break;
 522                 }
 523                 qca->ibs_sent_wakes++;
 524                 retrans_delay = msecs_to_jiffies(qca->wake_retrans);
 525                 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
 526                 break;
 527
 528         case HCI_IBS_TX_ASLEEP:
 529         case HCI_IBS_TX_AWAKE:
 530         default:
 531                 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
 532                 break;
 533         }
 534
 535         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 536
 537         if (retransmit)
 538                 hci_uart_tx_wakeup(hu);
 539 }
 540
 541
 542 static void qca_controller_memdump_timeout(struct work_struct *work)
 543 {
 544         struct qca_data *qca = container_of(work, struct qca_data,
 545                                         ctrl_memdump_timeout.work);
 546         struct hci_uart *hu = qca->hu;
 547
 548         mutex_lock(&qca->hci_memdump_lock);
 549         if (test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) {
 550                 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
 551                 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {
 552                         /* Inject hw error event to reset the device
 553                          * and driver.
 554                          */
 555                         hci_reset_dev(hu->hdev);
 556                 }
 557         }
 558
 559         mutex_unlock(&qca->hci_memdump_lock);
 560 }
 561
 562
 563 /* Initialize protocol */
 564 static int qca_open(struct hci_uart *hu)
 565 {
 566         struct qca_serdev *qcadev;
 567         struct qca_data *qca;
 568
 569         BT_DBG("hu %p qca_open", hu);
 570
 571         if (!hci_uart_has_flow_control(hu))
 572                 return -EOPNOTSUPP;
 573
 574         qca = kzalloc(sizeof(*qca), GFP_KERNEL);
 575         if (!qca)
 576                 return -ENOMEM;
 577
 578         skb_queue_head_init(&qca->txq);
 579         skb_queue_head_init(&qca->tx_wait_q);
 580         skb_queue_head_init(&qca->rx_memdump_q);
 581         spin_lock_init(&qca->hci_ibs_lock);
 582         mutex_init(&qca->hci_memdump_lock);
 583         qca->workqueue = alloc_ordered_workqueue("qca_wq", 0);
 584         if (!qca->workqueue) {
 585                 BT_ERR("QCA Workqueue not initialized properly");
 586                 kfree(qca);
 587                 return -ENOMEM;
 588         }
 589
 590         INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx);
 591         INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device);
 592         INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off);
 593         INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off);
 594         INIT_WORK(&qca->ctrl_memdump_evt, qca_controller_memdump);
 595         INIT_DELAYED_WORK(&qca->ctrl_memdump_timeout,
 596                           qca_controller_memdump_timeout);
 597         init_waitqueue_head(&qca->suspend_wait_q);
 598
 599         qca->hu = hu;
 600         init_completion(&qca->drop_ev_comp);
 601
 602         /* Assume we start with both sides asleep -- extra wakes OK */
 603         qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
 604         qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
 605
 606         qca->vote_last_jif = jiffies;
 607
 608         hu->priv = qca;
 609
 610         if (hu->serdev) {
 611                 qcadev = serdev_device_get_drvdata(hu->serdev);
 612
 613                 switch (qcadev->btsoc_type) {
 614                 case QCA_WCN3988:
 615                 case QCA_WCN3990:
 616                 case QCA_WCN3991:
 617                 case QCA_WCN3998:
 618                 case QCA_WCN6750:
 619                         hu->init_speed = qcadev->init_speed;
 620                         break;
 621
 622                 default:
 623                         break;
 624                 }
 625
 626                 if (qcadev->oper_speed)
 627                         hu->oper_speed = qcadev->oper_speed;
 628         }
 629
 630         timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0);
 631         qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;
 632
 633         timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0);
 634         qca->tx_idle_delay = IBS_HOST_TX_IDLE_TIMEOUT_MS;
 635
 636         BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
 637                qca->tx_idle_delay, qca->wake_retrans);
 638
 639         return 0;
 640 }
 641
 642 static void qca_debugfs_init(struct hci_dev *hdev)
 643 {
 644         struct hci_uart *hu = hci_get_drvdata(hdev);
 645         struct qca_data *qca = hu->priv;
 646         struct dentry *ibs_dir;
 647         umode_t mode;
 648
 649         if (!hdev->debugfs)
 650                 return;
 651
 652         if (test_and_set_bit(QCA_DEBUGFS_CREATED, &qca->flags))
 653                 return;
 654
 655         ibs_dir = debugfs_create_dir("ibs", hdev->debugfs);
 656
 657         /* read only */
 658         mode = 0444;
 659         debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state);
 660         debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state);
 661         debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir,
 662                            &qca->ibs_sent_slps);
 663         debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir,
 664                            &qca->ibs_sent_wakes);
 665         debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir,
 666                            &qca->ibs_sent_wacks);
 667         debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir,
 668                            &qca->ibs_recv_slps);
 669         debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir,
 670                            &qca->ibs_recv_wakes);
 671         debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir,
 672                            &qca->ibs_recv_wacks);
 673         debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote);
 674         debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on);
 675         debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off);
 676         debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote);
 677         debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on);
 678         debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off);
 679         debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on);
 680         debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off);
 681         debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms);
 682         debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms);
 683
 684         /* read/write */
 685         mode = 0644;
 686         debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans);
 687         debugfs_create_u32("tx_idle_delay", mode, ibs_dir,
 688                            &qca->tx_idle_delay);
 689 }
 690
 691 /* Flush protocol data */
 692 static int qca_flush(struct hci_uart *hu)
 693 {
 694         struct qca_data *qca = hu->priv;
 695
 696         BT_DBG("hu %p qca flush", hu);
 697
 698         skb_queue_purge(&qca->tx_wait_q);
 699         skb_queue_purge(&qca->txq);
 700
 701         return 0;
 702 }
 703
 704 /* Close protocol */
 705 static int qca_close(struct hci_uart *hu)
 706 {
 707         struct qca_data *qca = hu->priv;
 708
 709         BT_DBG("hu %p qca close", hu);
 710
 711         serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu);
 712
 713         skb_queue_purge(&qca->tx_wait_q);
 714         skb_queue_purge(&qca->txq);
 715         skb_queue_purge(&qca->rx_memdump_q);
 716         /*
 717          * Shut the timers down so they can't be rearmed when
 718          * destroy_workqueue() drains pending work which in turn might try
 719          * to arm a timer.  After shutdown rearm attempts are silently
 720          * ignored by the timer core code.
 721          */
 722         timer_shutdown_sync(&qca->tx_idle_timer);
 723         timer_shutdown_sync(&qca->wake_retrans_timer);
 724         destroy_workqueue(qca->workqueue);
 725         qca->hu = NULL;
 726
 727         kfree_skb(qca->rx_skb);
 728
 729         hu->priv = NULL;
 730
 731         kfree(qca);
 732
 733         return 0;
 734 }
 735
 736 /* Called upon a wake-up-indication from the device.
 737  */
 738 static void device_want_to_wakeup(struct hci_uart *hu)
 739 {
 740         unsigned long flags;
 741         struct qca_data *qca = hu->priv;
 742
 743         BT_DBG("hu %p want to wake up", hu);
 744
 745         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 746
 747         qca->ibs_recv_wakes++;
 748
 749         /* Don't wake the rx up when suspending. */
 750         if (test_bit(QCA_SUSPENDING, &qca->flags)) {
 751                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 752                 return;
 753         }
 754
 755         switch (qca->rx_ibs_state) {
 756         case HCI_IBS_RX_ASLEEP:
 757                 /* Make sure clock is on - we may have turned clock off since
 758                  * receiving the wake up indicator awake rx clock.
 759                  */
 760                 queue_work(qca->workqueue, &qca->ws_awake_rx);
 761                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 762                 return;
 763
 764         case HCI_IBS_RX_AWAKE:
 765                 /* Always acknowledge device wake up,
 766                  * sending IBS message doesn't count as TX ON.
 767                  */
 768                 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) {
 769                         BT_ERR("Failed to acknowledge device wake up");
 770                         break;
 771                 }
 772                 qca->ibs_sent_wacks++;
 773                 break;
 774
 775         default:
 776                 /* Any other state is illegal */
 777                 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d",
 778                        qca->rx_ibs_state);
 779                 break;
 780         }
 781
 782         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 783
 784         /* Actually send the packets */
 785         hci_uart_tx_wakeup(hu);
 786 }
 787
 788 /* Called upon a sleep-indication from the device.
 789  */
 790 static void device_want_to_sleep(struct hci_uart *hu)
 791 {
 792         unsigned long flags;
 793         struct qca_data *qca = hu->priv;
 794
 795         BT_DBG("hu %p want to sleep in %d state", hu, qca->rx_ibs_state);
 796
 797         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 798
 799         qca->ibs_recv_slps++;
 800
 801         switch (qca->rx_ibs_state) {
 802         case HCI_IBS_RX_AWAKE:
 803                 /* Update state */
 804                 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
 805                 /* Vote off rx clock under workqueue */
 806                 queue_work(qca->workqueue, &qca->ws_rx_vote_off);
 807                 break;
 808
 809         case HCI_IBS_RX_ASLEEP:
 810                 break;
 811
 812         default:
 813                 /* Any other state is illegal */
 814                 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d",
 815                        qca->rx_ibs_state);
 816                 break;
 817         }
 818
 819         wake_up_interruptible(&qca->suspend_wait_q);
 820
 821         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 822 }
 823
 824 /* Called upon wake-up-acknowledgement from the device
 825  */
 826 static void device_woke_up(struct hci_uart *hu)
 827 {
 828         unsigned long flags, idle_delay;
 829         struct qca_data *qca = hu->priv;
 830         struct sk_buff *skb = NULL;
 831
 832         BT_DBG("hu %p woke up", hu);
 833
 834         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 835
 836         qca->ibs_recv_wacks++;
 837
 838         /* Don't react to the wake-up-acknowledgment when suspending. */
 839         if (test_bit(QCA_SUSPENDING, &qca->flags)) {
 840                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 841                 return;
 842         }
 843
 844         switch (qca->tx_ibs_state) {
 845         case HCI_IBS_TX_AWAKE:
 846                 /* Expect one if we send 2 WAKEs */
 847                 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d",
 848                        qca->tx_ibs_state);
 849                 break;
 850
 851         case HCI_IBS_TX_WAKING:
 852                 /* Send pending packets */
 853                 while ((skb = skb_dequeue(&qca->tx_wait_q)))
 854                         skb_queue_tail(&qca->txq, skb);
 855
 856                 /* Switch timers and change state to HCI_IBS_TX_AWAKE */
 857                 del_timer(&qca->wake_retrans_timer);
 858                 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
 859                 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
 860                 qca->tx_ibs_state = HCI_IBS_TX_AWAKE;
 861                 break;
 862
 863         case HCI_IBS_TX_ASLEEP:
 864         default:
 865                 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d",
 866                        qca->tx_ibs_state);
 867                 break;
 868         }
 869
 870         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 871
 872         /* Actually send the packets */
 873         hci_uart_tx_wakeup(hu);
 874 }
 875
 876 /* Enqueue frame for transmittion (padding, crc, etc) may be called from
 877  * two simultaneous tasklets.
 878  */
 879 static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 880 {
 881         unsigned long flags = 0, idle_delay;
 882         struct qca_data *qca = hu->priv;
 883
 884         BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb,
 885                qca->tx_ibs_state);
 886
 887         if (test_bit(QCA_SSR_TRIGGERED, &qca->flags)) {
 888                 /* As SSR is in progress, ignore the packets */
 889                 bt_dev_dbg(hu->hdev, "SSR is in progress");
 890                 kfree_skb(skb);
 891                 return 0;
 892         }
 893
 894         /* Prepend skb with frame type */
 895         memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
 896
 897         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 898
 899         /* Don't go to sleep in middle of patch download or
 900          * Out-Of-Band(GPIOs control) sleep is selected.
 901          * Don't wake the device up when suspending.
 902          */
 903         if (test_bit(QCA_IBS_DISABLED, &qca->flags) ||
 904             test_bit(QCA_SUSPENDING, &qca->flags)) {
 905                 skb_queue_tail(&qca->txq, skb);
 906                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 907                 return 0;
 908         }
 909
 910         /* Act according to current state */
 911         switch (qca->tx_ibs_state) {
 912         case HCI_IBS_TX_AWAKE:
 913                 BT_DBG("Device awake, sending normally");
 914                 skb_queue_tail(&qca->txq, skb);
 915                 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
 916                 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
 917                 break;
 918
 919         case HCI_IBS_TX_ASLEEP:
 920                 BT_DBG("Device asleep, waking up and queueing packet");
 921                 /* Save packet for later */
 922                 skb_queue_tail(&qca->tx_wait_q, skb);
 923
 924                 qca->tx_ibs_state = HCI_IBS_TX_WAKING;
 925                 /* Schedule a work queue to wake up device */
 926                 queue_work(qca->workqueue, &qca->ws_awake_device);
 927                 break;
 928
 929         case HCI_IBS_TX_WAKING:
 930                 BT_DBG("Device waking up, queueing packet");
 931                 /* Transient state; just keep packet for later */
 932                 skb_queue_tail(&qca->tx_wait_q, skb);
 933                 break;
 934
 935         default:
 936                 BT_ERR("Illegal tx state: %d (losing packet)",
 937                        qca->tx_ibs_state);
 938                 dev_kfree_skb_irq(skb);
 939                 break;
 940         }
 941
 942         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 943
 944         return 0;
 945 }
 946
 947 static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb)
 948 {
 949         struct hci_uart *hu = hci_get_drvdata(hdev);
 950
 951         BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND);
 952
 953         device_want_to_sleep(hu);
 954
 955         kfree_skb(skb);
 956         return 0;
 957 }
 958
 959 static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb)
 960 {
 961         struct hci_uart *hu = hci_get_drvdata(hdev);
 962
 963         BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND);
 964
 965         device_want_to_wakeup(hu);
 966
 967         kfree_skb(skb);
 968         return 0;
 969 }
 970
 971 static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb)
 972 {
 973         struct hci_uart *hu = hci_get_drvdata(hdev);
 974
 975         BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK);
 976
 977         device_woke_up(hu);
 978
 979         kfree_skb(skb);
 980         return 0;
 981 }
 982
 983 static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb)
 984 {
 985         /* We receive debug logs from chip as an ACL packets.
 986          * Instead of sending the data to ACL to decode the
 987          * received data, we are pushing them to the above layers
 988          * as a diagnostic packet.
 989          */
 990         if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE)
 991                 return hci_recv_diag(hdev, skb);
 992
 993         return hci_recv_frame(hdev, skb);
 994 }
 995
 996 static void qca_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb)
 997 {
 998         struct hci_uart *hu = hci_get_drvdata(hdev);
 999         struct qca_data *qca = hu->priv;
1000         char buf[80];
1001
1002         snprintf(buf, sizeof(buf), "Controller Name: 0x%x\n",
1003                 qca->controller_id);
1004         skb_put_data(skb, buf, strlen(buf));
1005
1006         snprintf(buf, sizeof(buf), "Firmware Version: 0x%x\n",
1007                 qca->fw_version);
1008         skb_put_data(skb, buf, strlen(buf));
1009
1010         snprintf(buf, sizeof(buf), "Vendor:Qualcomm\n");
1011         skb_put_data(skb, buf, strlen(buf));
1012
1013         snprintf(buf, sizeof(buf), "Driver: %s\n",
1014                 hu->serdev->dev.driver->name);
1015         skb_put_data(skb, buf, strlen(buf));
1016 }
1017
1018 static void qca_controller_memdump(struct work_struct *work)
1019 {
1020         struct qca_data *qca = container_of(work, struct qca_data,
1021                                             ctrl_memdump_evt);
1022         struct hci_uart *hu = qca->hu;
1023         struct sk_buff *skb;
1024         struct qca_memdump_event_hdr *cmd_hdr;
1025         struct qca_memdump_info *qca_memdump = qca->qca_memdump;
1026         struct qca_dump_size *dump;
1027         u16 seq_no;
1028         u32 rx_size;
1029         int ret = 0;
1030         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1031
1032         while ((skb = skb_dequeue(&qca->rx_memdump_q))) {
1033
1034                 mutex_lock(&qca->hci_memdump_lock);
1035                 /* Skip processing the received packets if timeout detected
1036                  * or memdump collection completed.
1037                  */
1038                 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||
1039                     qca->memdump_state == QCA_MEMDUMP_COLLECTED) {
1040                         mutex_unlock(&qca->hci_memdump_lock);
1041                         return;
1042                 }
1043
1044                 if (!qca_memdump) {
1045                         qca_memdump = kzalloc(sizeof(*qca_memdump), GFP_ATOMIC);
1046                         if (!qca_memdump) {
1047                                 mutex_unlock(&qca->hci_memdump_lock);
1048                                 return;
1049                         }
1050
1051                         qca->qca_memdump = qca_memdump;
1052                 }
1053
1054                 qca->memdump_state = QCA_MEMDUMP_COLLECTING;
1055                 cmd_hdr = (void *) skb->data;
1056                 seq_no = __le16_to_cpu(cmd_hdr->seq_no);
1057                 skb_pull(skb, sizeof(struct qca_memdump_event_hdr));
1058
1059                 if (!seq_no) {
1060
1061                         /* This is the first frame of memdump packet from
1062                          * the controller, Disable IBS to recevie dump
1063                          * with out any interruption, ideally time required for
1064                          * the controller to send the dump is 8 seconds. let us
1065                          * start timer to handle this asynchronous activity.
1066                          */
1067                         set_bit(QCA_IBS_DISABLED, &qca->flags);
1068                         set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1069                         dump = (void *) skb->data;
1070                         qca_memdump->ram_dump_size = __le32_to_cpu(dump->dump_size);
1071                         if (!(qca_memdump->ram_dump_size)) {
1072                                 bt_dev_err(hu->hdev, "Rx invalid memdump size");
1073                                 kfree(qca_memdump);
1074                                 kfree_skb(skb);
1075                                 mutex_unlock(&qca->hci_memdump_lock);
1076                                 return;
1077                         }
1078
1079                         queue_delayed_work(qca->workqueue,
1080                                            &qca->ctrl_memdump_timeout,
1081                                            msecs_to_jiffies(MEMDUMP_TIMEOUT_MS));
1082                         skb_pull(skb, sizeof(qca_memdump->ram_dump_size));
1083                         qca_memdump->current_seq_no = 0;
1084                         qca_memdump->received_dump = 0;
1085                         ret = hci_devcd_init(hu->hdev, qca_memdump->ram_dump_size);
1086                         bt_dev_info(hu->hdev, "hci_devcd_init Return:%d",
1087                                     ret);
1088                         if (ret < 0) {
1089                                 kfree(qca->qca_memdump);
1090                                 qca->qca_memdump = NULL;
1091                                 qca->memdump_state = QCA_MEMDUMP_COLLECTED;
1092                                 cancel_delayed_work(&qca->ctrl_memdump_timeout);
1093                                 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1094                                 mutex_unlock(&qca->hci_memdump_lock);
1095                                 return;
1096                         }
1097
1098                         bt_dev_info(hu->hdev, "QCA collecting dump of size:%u",
1099                                     qca_memdump->ram_dump_size);
1100
1101                 }
1102
1103                 /* If sequence no 0 is missed then there is no point in
1104                  * accepting the other sequences.
1105                  */
1106                 if (!test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) {
1107                         bt_dev_err(hu->hdev, "QCA: Discarding other packets");
1108                         kfree(qca_memdump);
1109                         kfree_skb(skb);
1110                         mutex_unlock(&qca->hci_memdump_lock);
1111                         return;
1112                 }
1113                 /* There could be chance of missing some packets from
1114                  * the controller. In such cases let us store the dummy
1115                  * packets in the buffer.
1116                  */
1117                 /* For QCA6390, controller does not lost packets but
1118                  * sequence number field of packet sometimes has error
1119                  * bits, so skip this checking for missing packet.
1120                  */
1121                 while ((seq_no > qca_memdump->current_seq_no + 1) &&
1122                         (soc_type != QCA_QCA6390) &&
1123                         seq_no != QCA_LAST_SEQUENCE_NUM) {
1124                         bt_dev_err(hu->hdev, "QCA controller missed packet:%d",
1125                                    qca_memdump->current_seq_no);
1126                         rx_size = qca_memdump->received_dump;
1127                         rx_size += QCA_DUMP_PACKET_SIZE;
1128                         if (rx_size > qca_memdump->ram_dump_size) {
1129                                 bt_dev_err(hu->hdev,
1130                                            "QCA memdump received %d, no space for missed packet",
1131                                            qca_memdump->received_dump);
1132                                 break;
1133                         }
1134                         hci_devcd_append_pattern(hu->hdev, 0x00,
1135                                 QCA_DUMP_PACKET_SIZE);
1136                         qca_memdump->received_dump += QCA_DUMP_PACKET_SIZE;
1137                         qca_memdump->current_seq_no++;
1138                 }
1139
1140                 rx_size = qca_memdump->received_dump  + skb->len;
1141                 if (rx_size <= qca_memdump->ram_dump_size) {
1142                         if ((seq_no != QCA_LAST_SEQUENCE_NUM) &&
1143                             (seq_no != qca_memdump->current_seq_no)) {
1144                                 bt_dev_err(hu->hdev,
1145                                            "QCA memdump unexpected packet %d",
1146                                            seq_no);
1147                         }
1148                         bt_dev_dbg(hu->hdev,
1149                                    "QCA memdump packet %d with length %d",
1150                                    seq_no, skb->len);
1151                         hci_devcd_append(hu->hdev, skb);
1152                         qca_memdump->current_seq_no += 1;
1153                         qca_memdump->received_dump = rx_size;
1154                 } else {
1155                         bt_dev_err(hu->hdev,
1156                                    "QCA memdump received no space for packet %d",
1157                                     qca_memdump->current_seq_no);
1158                 }
1159
1160                 if (seq_no == QCA_LAST_SEQUENCE_NUM) {
1161                         bt_dev_info(hu->hdev,
1162                                 "QCA memdump Done, received %d, total %d",
1163                                 qca_memdump->received_dump,
1164                                 qca_memdump->ram_dump_size);
1165                         hci_devcd_complete(hu->hdev);
1166                         cancel_delayed_work(&qca->ctrl_memdump_timeout);
1167                         kfree(qca->qca_memdump);
1168                         qca->qca_memdump = NULL;
1169                         qca->memdump_state = QCA_MEMDUMP_COLLECTED;
1170                         clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1171                 }
1172
1173                 mutex_unlock(&qca->hci_memdump_lock);
1174         }
1175
1176 }
1177
1178 static int qca_controller_memdump_event(struct hci_dev *hdev,
1179                                         struct sk_buff *skb)
1180 {
1181         struct hci_uart *hu = hci_get_drvdata(hdev);
1182         struct qca_data *qca = hu->priv;
1183
1184         set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1185         skb_queue_tail(&qca->rx_memdump_q, skb);
1186         queue_work(qca->workqueue, &qca->ctrl_memdump_evt);
1187
1188         return 0;
1189 }
1190
1191 static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
1192 {
1193         struct hci_uart *hu = hci_get_drvdata(hdev);
1194         struct qca_data *qca = hu->priv;
1195
1196         if (test_bit(QCA_DROP_VENDOR_EVENT, &qca->flags)) {
1197                 struct hci_event_hdr *hdr = (void *)skb->data;
1198
1199                 /* For the WCN3990 the vendor command for a baudrate change
1200                  * isn't sent as synchronous HCI command, because the
1201                  * controller sends the corresponding vendor event with the
1202                  * new baudrate. The event is received and properly decoded
1203                  * after changing the baudrate of the host port. It needs to
1204                  * be dropped, otherwise it can be misinterpreted as
1205                  * response to a later firmware download command (also a
1206                  * vendor command).
1207                  */
1208
1209                 if (hdr->evt == HCI_EV_VENDOR)
1210                         complete(&qca->drop_ev_comp);
1211
1212                 kfree_skb(skb);
1213
1214                 return 0;
1215         }
1216         /* We receive chip memory dump as an event packet, With a dedicated
1217          * handler followed by a hardware error event. When this event is
1218          * received we store dump into a file before closing hci. This
1219          * dump will help in triaging the issues.
1220          */
1221         if ((skb->data[0] == HCI_VENDOR_PKT) &&
1222             (get_unaligned_be16(skb->data + 2) == QCA_SSR_DUMP_HANDLE))
1223                 return qca_controller_memdump_event(hdev, skb);
1224
1225         return hci_recv_frame(hdev, skb);
1226 }
1227
1228 #define QCA_IBS_SLEEP_IND_EVENT \
1229         .type = HCI_IBS_SLEEP_IND, \
1230         .hlen = 0, \
1231         .loff = 0, \
1232         .lsize = 0, \
1233         .maxlen = HCI_MAX_IBS_SIZE
1234
1235 #define QCA_IBS_WAKE_IND_EVENT \
1236         .type = HCI_IBS_WAKE_IND, \
1237         .hlen = 0, \
1238         .loff = 0, \
1239         .lsize = 0, \
1240         .maxlen = HCI_MAX_IBS_SIZE
1241
1242 #define QCA_IBS_WAKE_ACK_EVENT \
1243         .type = HCI_IBS_WAKE_ACK, \
1244         .hlen = 0, \
1245         .loff = 0, \
1246         .lsize = 0, \
1247         .maxlen = HCI_MAX_IBS_SIZE
1248
1249 static const struct h4_recv_pkt qca_recv_pkts[] = {
1250         { H4_RECV_ACL,             .recv = qca_recv_acl_data },
1251         { H4_RECV_SCO,             .recv = hci_recv_frame    },
1252         { H4_RECV_EVENT,           .recv = qca_recv_event    },
1253         { QCA_IBS_WAKE_IND_EVENT,  .recv = qca_ibs_wake_ind  },
1254         { QCA_IBS_WAKE_ACK_EVENT,  .recv = qca_ibs_wake_ack  },
1255         { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind },
1256 };
1257
1258 static int qca_recv(struct hci_uart *hu, const void *data, int count)
1259 {
1260         struct qca_data *qca = hu->priv;
1261
1262         if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
1263                 return -EUNATCH;
1264
1265         qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count,
1266                                   qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts));
1267         if (IS_ERR(qca->rx_skb)) {
1268                 int err = PTR_ERR(qca->rx_skb);
1269                 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
1270                 qca->rx_skb = NULL;
1271                 return err;
1272         }
1273
1274         return count;
1275 }
1276
1277 static struct sk_buff *qca_dequeue(struct hci_uart *hu)
1278 {
1279         struct qca_data *qca = hu->priv;
1280
1281         return skb_dequeue(&qca->txq);
1282 }
1283
1284 static uint8_t qca_get_baudrate_value(int speed)
1285 {
1286         switch (speed) {
1287         case 9600:
1288                 return QCA_BAUDRATE_9600;
1289         case 19200:
1290                 return QCA_BAUDRATE_19200;
1291         case 38400:
1292                 return QCA_BAUDRATE_38400;
1293         case 57600:
1294                 return QCA_BAUDRATE_57600;
1295         case 115200:
1296                 return QCA_BAUDRATE_115200;
1297         case 230400:
1298                 return QCA_BAUDRATE_230400;
1299         case 460800:
1300                 return QCA_BAUDRATE_460800;
1301         case 500000:
1302                 return QCA_BAUDRATE_500000;
1303         case 921600:
1304                 return QCA_BAUDRATE_921600;
1305         case 1000000:
1306                 return QCA_BAUDRATE_1000000;
1307         case 2000000:
1308                 return QCA_BAUDRATE_2000000;
1309         case 3000000:
1310                 return QCA_BAUDRATE_3000000;
1311         case 3200000:
1312                 return QCA_BAUDRATE_3200000;
1313         case 3500000:
1314                 return QCA_BAUDRATE_3500000;
1315         default:
1316                 return QCA_BAUDRATE_115200;
1317         }
1318 }
1319
1320 static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
1321 {
1322         struct hci_uart *hu = hci_get_drvdata(hdev);
1323         struct qca_data *qca = hu->priv;
1324         struct sk_buff *skb;
1325         u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };
1326
1327         if (baudrate > QCA_BAUDRATE_3200000)
1328                 return -EINVAL;
1329
1330         cmd[4] = baudrate;
1331
1332         skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1333         if (!skb) {
1334                 bt_dev_err(hdev, "Failed to allocate baudrate packet");
1335                 return -ENOMEM;
1336         }
1337
1338         /* Assign commands to change baudrate and packet type. */
1339         skb_put_data(skb, cmd, sizeof(cmd));
1340         hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1341
1342         skb_queue_tail(&qca->txq, skb);
1343         hci_uart_tx_wakeup(hu);
1344
1345         /* Wait for the baudrate change request to be sent */
1346
1347         while (!skb_queue_empty(&qca->txq))
1348                 usleep_range(100, 200);
1349
1350         if (hu->serdev)
1351                 serdev_device_wait_until_sent(hu->serdev,
1352                       msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
1353
1354         /* Give the controller time to process the request */
1355         switch (qca_soc_type(hu)) {
1356         case QCA_WCN3988:
1357         case QCA_WCN3990:
1358         case QCA_WCN3991:
1359         case QCA_WCN3998:
1360         case QCA_WCN6750:
1361         case QCA_WCN6855:
1362         case QCA_WCN7850:
1363                 usleep_range(1000, 10000);
1364                 break;
1365
1366         default:
1367                 msleep(300);
1368         }
1369
1370         return 0;
1371 }
1372
1373 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
1374 {
1375         if (hu->serdev)
1376                 serdev_device_set_baudrate(hu->serdev, speed);
1377         else
1378                 hci_uart_set_baudrate(hu, speed);
1379 }
1380
1381 static int qca_send_power_pulse(struct hci_uart *hu, bool on)
1382 {
1383         int ret;
1384         int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
1385         u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE;
1386
1387         /* These power pulses are single byte command which are sent
1388          * at required baudrate to wcn3990. On wcn3990, we have an external
1389          * circuit at Tx pin which decodes the pulse sent at specific baudrate.
1390          * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT
1391          * and also we use the same power inputs to turn on and off for
1392          * Wi-Fi/BT. Powering up the power sources will not enable BT, until
1393          * we send a power on pulse at 115200 bps. This algorithm will help to
1394          * save power. Disabling hardware flow control is mandatory while
1395          * sending power pulses to SoC.
1396          */
1397         bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd);
1398
1399         serdev_device_write_flush(hu->serdev);
1400         hci_uart_set_flow_control(hu, true);
1401         ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
1402         if (ret < 0) {
1403                 bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd);
1404                 return ret;
1405         }
1406
1407         serdev_device_wait_until_sent(hu->serdev, timeout);
1408         hci_uart_set_flow_control(hu, false);
1409
1410         /* Give to controller time to boot/shutdown */
1411         if (on)
1412                 msleep(100);
1413         else
1414                 usleep_range(1000, 10000);
1415
1416         return 0;
1417 }
1418
1419 static unsigned int qca_get_speed(struct hci_uart *hu,
1420                                   enum qca_speed_type speed_type)
1421 {
1422         unsigned int speed = 0;
1423
1424         if (speed_type == QCA_INIT_SPEED) {
1425                 if (hu->init_speed)
1426                         speed = hu->init_speed;
1427                 else if (hu->proto->init_speed)
1428                         speed = hu->proto->init_speed;
1429         } else {
1430                 if (hu->oper_speed)
1431                         speed = hu->oper_speed;
1432                 else if (hu->proto->oper_speed)
1433                         speed = hu->proto->oper_speed;
1434         }
1435
1436         return speed;
1437 }
1438
1439 static int qca_check_speeds(struct hci_uart *hu)
1440 {
1441         switch (qca_soc_type(hu)) {
1442         case QCA_WCN3988:
1443         case QCA_WCN3990:
1444         case QCA_WCN3991:
1445         case QCA_WCN3998:
1446         case QCA_WCN6750:
1447         case QCA_WCN6855:
1448         case QCA_WCN7850:
1449                 if (!qca_get_speed(hu, QCA_INIT_SPEED) &&
1450                     !qca_get_speed(hu, QCA_OPER_SPEED))
1451                         return -EINVAL;
1452                 break;
1453
1454         default:
1455                 if (!qca_get_speed(hu, QCA_INIT_SPEED) ||
1456                     !qca_get_speed(hu, QCA_OPER_SPEED))
1457                         return -EINVAL;
1458         }
1459
1460         return 0;
1461 }
1462
1463 static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
1464 {
1465         unsigned int speed, qca_baudrate;
1466         struct qca_data *qca = hu->priv;
1467         int ret = 0;
1468
1469         if (speed_type == QCA_INIT_SPEED) {
1470                 speed = qca_get_speed(hu, QCA_INIT_SPEED);
1471                 if (speed)
1472                         host_set_baudrate(hu, speed);
1473         } else {
1474                 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1475
1476                 speed = qca_get_speed(hu, QCA_OPER_SPEED);
1477                 if (!speed)
1478                         return 0;
1479
1480                 /* Disable flow control for wcn3990 to deassert RTS while
1481                  * changing the baudrate of chip and host.
1482                  */
1483                 switch (soc_type) {
1484                 case QCA_WCN3988:
1485                 case QCA_WCN3990:
1486                 case QCA_WCN3991:
1487                 case QCA_WCN3998:
1488                 case QCA_WCN6750:
1489                 case QCA_WCN6855:
1490                 case QCA_WCN7850:
1491                         hci_uart_set_flow_control(hu, true);
1492                         break;
1493
1494                 default:
1495                         break;
1496                 }
1497
1498                 switch (soc_type) {
1499                 case QCA_WCN3990:
1500                         reinit_completion(&qca->drop_ev_comp);
1501                         set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);
1502                         break;
1503
1504                 default:
1505                         break;
1506                 }
1507
1508                 qca_baudrate = qca_get_baudrate_value(speed);
1509                 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed);
1510                 ret = qca_set_baudrate(hu->hdev, qca_baudrate);
1511                 if (ret)
1512                         goto error;
1513
1514                 host_set_baudrate(hu, speed);
1515
1516 error:
1517                 switch (soc_type) {
1518                 case QCA_WCN3988:
1519                 case QCA_WCN3990:
1520                 case QCA_WCN3991:
1521                 case QCA_WCN3998:
1522                 case QCA_WCN6750:
1523                 case QCA_WCN6855:
1524                 case QCA_WCN7850:
1525                         hci_uart_set_flow_control(hu, false);
1526                         break;
1527
1528                 default:
1529                         break;
1530                 }
1531
1532                 switch (soc_type) {
1533                 case QCA_WCN3990:
1534                         /* Wait for the controller to send the vendor event
1535                          * for the baudrate change command.
1536                          */
1537                         if (!wait_for_completion_timeout(&qca->drop_ev_comp,
1538                                                  msecs_to_jiffies(100))) {
1539                                 bt_dev_err(hu->hdev,
1540                                            "Failed to change controller baudrate\n");
1541                                 ret = -ETIMEDOUT;
1542                         }
1543
1544                         clear_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);
1545                         break;
1546
1547                 default:
1548                         break;
1549                 }
1550         }
1551
1552         return ret;
1553 }
1554
1555 static int qca_send_crashbuffer(struct hci_uart *hu)
1556 {
1557         struct qca_data *qca = hu->priv;
1558         struct sk_buff *skb;
1559
1560         skb = bt_skb_alloc(QCA_CRASHBYTE_PACKET_LEN, GFP_KERNEL);
1561         if (!skb) {
1562                 bt_dev_err(hu->hdev, "Failed to allocate memory for skb packet");
1563                 return -ENOMEM;
1564         }
1565
1566         /* We forcefully crash the controller, by sending 0xfb byte for
1567          * 1024 times. We also might have chance of losing data, To be
1568          * on safer side we send 1096 bytes to the SoC.
1569          */
1570         memset(skb_put(skb, QCA_CRASHBYTE_PACKET_LEN), QCA_MEMDUMP_BYTE,
1571                QCA_CRASHBYTE_PACKET_LEN);
1572         hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1573         bt_dev_info(hu->hdev, "crash the soc to collect controller dump");
1574         skb_queue_tail(&qca->txq, skb);
1575         hci_uart_tx_wakeup(hu);
1576
1577         return 0;
1578 }
1579
1580 static void qca_wait_for_dump_collection(struct hci_dev *hdev)
1581 {
1582         struct hci_uart *hu = hci_get_drvdata(hdev);
1583         struct qca_data *qca = hu->priv;
1584
1585         wait_on_bit_timeout(&qca->flags, QCA_MEMDUMP_COLLECTION,
1586                             TASK_UNINTERRUPTIBLE, MEMDUMP_TIMEOUT_MS);
1587
1588         clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1589 }
1590
1591 static void qca_hw_error(struct hci_dev *hdev, u8 code)
1592 {
1593         struct hci_uart *hu = hci_get_drvdata(hdev);
1594         struct qca_data *qca = hu->priv;
1595
1596         set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1597         set_bit(QCA_HW_ERROR_EVENT, &qca->flags);
1598         bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state);
1599
1600         if (qca->memdump_state == QCA_MEMDUMP_IDLE) {
1601                 /* If hardware error event received for other than QCA
1602                  * soc memory dump event, then we need to crash the SOC
1603                  * and wait here for 8 seconds to get the dump packets.
1604                  * This will block main thread to be on hold until we
1605                  * collect dump.
1606                  */
1607                 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1608                 qca_send_crashbuffer(hu);
1609                 qca_wait_for_dump_collection(hdev);
1610         } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {
1611                 /* Let us wait here until memory dump collected or
1612                  * memory dump timer expired.
1613                  */
1614                 bt_dev_info(hdev, "waiting for dump to complete");
1615                 qca_wait_for_dump_collection(hdev);
1616         }
1617
1618         mutex_lock(&qca->hci_memdump_lock);
1619         if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {
1620                 bt_dev_err(hu->hdev, "clearing allocated memory due to memdump timeout");
1621                 hci_devcd_abort(hu->hdev);
1622                 if (qca->qca_memdump) {
1623                         kfree(qca->qca_memdump);
1624                         qca->qca_memdump = NULL;
1625                 }
1626                 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
1627                 cancel_delayed_work(&qca->ctrl_memdump_timeout);
1628         }
1629         mutex_unlock(&qca->hci_memdump_lock);
1630
1631         if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||
1632             qca->memdump_state == QCA_MEMDUMP_COLLECTED) {
1633                 cancel_work_sync(&qca->ctrl_memdump_evt);
1634                 skb_queue_purge(&qca->rx_memdump_q);
1635         }
1636
1637         clear_bit(QCA_HW_ERROR_EVENT, &qca->flags);
1638 }
1639
1640 static void qca_cmd_timeout(struct hci_dev *hdev)
1641 {
1642         struct hci_uart *hu = hci_get_drvdata(hdev);
1643         struct qca_data *qca = hu->priv;
1644
1645         set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1646         if (qca->memdump_state == QCA_MEMDUMP_IDLE) {
1647                 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1648                 qca_send_crashbuffer(hu);
1649                 qca_wait_for_dump_collection(hdev);
1650         } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {
1651                 /* Let us wait here until memory dump collected or
1652                  * memory dump timer expired.
1653                  */
1654                 bt_dev_info(hdev, "waiting for dump to complete");
1655                 qca_wait_for_dump_collection(hdev);
1656         }
1657
1658         mutex_lock(&qca->hci_memdump_lock);
1659         if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {
1660                 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
1661                 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {
1662                         /* Inject hw error event to reset the device
1663                          * and driver.
1664                          */
1665                         hci_reset_dev(hu->hdev);
1666                 }
1667         }
1668         mutex_unlock(&qca->hci_memdump_lock);
1669 }
1670
1671 static bool qca_wakeup(struct hci_dev *hdev)
1672 {
1673         struct hci_uart *hu = hci_get_drvdata(hdev);
1674         bool wakeup;
1675
1676         if (!hu->serdev)
1677                 return true;
1678
1679         /* BT SoC attached through the serial bus is handled by the serdev driver.
1680          * So we need to use the device handle of the serdev driver to get the
1681          * status of device may wakeup.
1682          */
1683         wakeup = device_may_wakeup(&hu->serdev->ctrl->dev);
1684         bt_dev_dbg(hu->hdev, "wakeup status : %d", wakeup);
1685
1686         return wakeup;
1687 }
1688
1689 static int qca_port_reopen(struct hci_uart *hu)
1690 {
1691         int ret;
1692
1693         /* Now the device is in ready state to communicate with host.
1694          * To sync host with device we need to reopen port.
1695          * Without this, we will have RTS and CTS synchronization
1696          * issues.
1697          */
1698         serdev_device_close(hu->serdev);
1699         ret = serdev_device_open(hu->serdev);
1700         if (ret) {
1701                 bt_dev_err(hu->hdev, "failed to open port");
1702                 return ret;
1703         }
1704
1705         hci_uart_set_flow_control(hu, false);
1706
1707         return 0;
1708 }
1709
1710 static int qca_regulator_init(struct hci_uart *hu)
1711 {
1712         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1713         struct qca_serdev *qcadev;
1714         int ret;
1715         bool sw_ctrl_state;
1716
1717         /* Check for vregs status, may be hci down has turned
1718          * off the voltage regulator.
1719          */
1720         qcadev = serdev_device_get_drvdata(hu->serdev);
1721
1722         if (!qcadev->bt_power->vregs_on) {
1723                 serdev_device_close(hu->serdev);
1724                 ret = qca_regulator_enable(qcadev);
1725                 if (ret)
1726                         return ret;
1727
1728                 ret = serdev_device_open(hu->serdev);
1729                 if (ret) {
1730                         bt_dev_err(hu->hdev, "failed to open port");
1731                         return ret;
1732                 }
1733         }
1734
1735         switch (soc_type) {
1736         case QCA_WCN3988:
1737         case QCA_WCN3990:
1738         case QCA_WCN3991:
1739         case QCA_WCN3998:
1740                 /* Forcefully enable wcn399x to enter in to boot mode. */
1741                 host_set_baudrate(hu, 2400);
1742                 ret = qca_send_power_pulse(hu, false);
1743                 if (ret)
1744                         return ret;
1745                 break;
1746
1747         default:
1748                 break;
1749         }
1750
1751         /* For wcn6750 need to enable gpio bt_en */
1752         if (qcadev->bt_en) {
1753                 gpiod_set_value_cansleep(qcadev->bt_en, 0);
1754                 msleep(50);
1755                 gpiod_set_value_cansleep(qcadev->bt_en, 1);
1756                 msleep(50);
1757                 if (qcadev->sw_ctrl) {
1758                         sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl);
1759                         bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state);
1760                 }
1761         }
1762
1763         qca_set_speed(hu, QCA_INIT_SPEED);
1764
1765         switch (soc_type) {
1766         case QCA_WCN3988:
1767         case QCA_WCN3990:
1768         case QCA_WCN3991:
1769         case QCA_WCN3998:
1770                 ret = qca_send_power_pulse(hu, true);
1771                 if (ret)
1772                         return ret;
1773                 break;
1774
1775         default:
1776                 break;
1777         }
1778
1779         return qca_port_reopen(hu);
1780 }
1781
1782 static int qca_power_on(struct hci_dev *hdev)
1783 {
1784         struct hci_uart *hu = hci_get_drvdata(hdev);
1785         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1786         struct qca_serdev *qcadev;
1787         struct qca_data *qca = hu->priv;
1788         int ret = 0;
1789
1790         /* Non-serdev device usually is powered by external power
1791          * and don't need additional action in driver for power on
1792          */
1793         if (!hu->serdev)
1794                 return 0;
1795
1796         switch (soc_type) {
1797         case QCA_WCN3988:
1798         case QCA_WCN3990:
1799         case QCA_WCN3991:
1800         case QCA_WCN3998:
1801         case QCA_WCN6750:
1802         case QCA_WCN6855:
1803         case QCA_WCN7850:
1804         case QCA_QCA6390:
1805                 ret = qca_regulator_init(hu);
1806                 break;
1807
1808         default:
1809                 qcadev = serdev_device_get_drvdata(hu->serdev);
1810                 if (qcadev->bt_en) {
1811                         gpiod_set_value_cansleep(qcadev->bt_en, 1);
1812                         /* Controller needs time to bootup. */
1813                         msleep(150);
1814                 }
1815         }
1816
1817         clear_bit(QCA_BT_OFF, &qca->flags);
1818         return ret;
1819 }
1820
1821 static void hci_coredump_qca(struct hci_dev *hdev)
1822 {
1823         int err;
1824         static const u8 param[] = { 0x26 };
1825
1826         err = __hci_cmd_send(hdev, 0xfc0c, 1, param);
1827         if (err < 0)
1828                 bt_dev_err(hdev, "%s: trigger crash failed (%d)", __func__, err);
1829 }
1830
1831 static int qca_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id)
1832 {
1833         /* QCA uses 1 as non-HCI data path id for HFP */
1834         *data_path_id = 1;
1835         return 0;
1836 }
1837
1838 static int qca_configure_hfp_offload(struct hci_dev *hdev)
1839 {
1840         bt_dev_info(hdev, "HFP non-HCI data transport is supported");
1841         hdev->get_data_path_id = qca_get_data_path_id;
1842         /* Do not need to send HCI_Configure_Data_Path to configure non-HCI
1843          * data transport path for QCA controllers, so set below field as NULL.
1844          */
1845         hdev->get_codec_config_data = NULL;
1846         return 0;
1847 }
1848
1849 static int qca_setup(struct hci_uart *hu)
1850 {
1851         struct hci_dev *hdev = hu->hdev;
1852         struct qca_data *qca = hu->priv;
1853         unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
1854         unsigned int retries = 0;
1855         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1856         const char *firmware_name = qca_get_firmware_name(hu);
1857         int ret;
1858         struct qca_btsoc_version ver;
1859         struct qca_serdev *qcadev;
1860         const char *soc_name;
1861
1862         ret = qca_check_speeds(hu);
1863         if (ret)
1864                 return ret;
1865
1866         clear_bit(QCA_ROM_FW, &qca->flags);
1867         /* Patch downloading has to be done without IBS mode */
1868         set_bit(QCA_IBS_DISABLED, &qca->flags);
1869
1870         /* Enable controller to do both LE scan and BR/EDR inquiry
1871          * simultaneously.
1872          */
1873         set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
1874
1875         switch (soc_type) {
1876         case QCA_QCA2066:
1877                 soc_name = "qca2066";
1878                 break;
1879
1880         case QCA_WCN3988:
1881         case QCA_WCN3990:
1882         case QCA_WCN3991:
1883         case QCA_WCN3998:
1884                 soc_name = "wcn399x";
1885                 break;
1886
1887         case QCA_WCN6750:
1888                 soc_name = "wcn6750";
1889                 break;
1890
1891         case QCA_WCN6855:
1892                 soc_name = "wcn6855";
1893                 break;
1894
1895         case QCA_WCN7850:
1896                 soc_name = "wcn7850";
1897                 break;
1898
1899         default:
1900                 soc_name = "ROME/QCA6390";
1901         }
1902         bt_dev_info(hdev, "setting up %s", soc_name);
1903
1904         qca->memdump_state = QCA_MEMDUMP_IDLE;
1905
1906 retry:
1907         ret = qca_power_on(hdev);
1908         if (ret)
1909                 goto out;
1910
1911         clear_bit(QCA_SSR_TRIGGERED, &qca->flags);
1912
1913         switch (soc_type) {
1914         case QCA_WCN3988:
1915         case QCA_WCN3990:
1916         case QCA_WCN3991:
1917         case QCA_WCN3998:
1918         case QCA_WCN6750:
1919         case QCA_WCN6855:
1920         case QCA_WCN7850:
1921                 qcadev = serdev_device_get_drvdata(hu->serdev);
1922                 if (qcadev->bdaddr_property_broken)
1923                         set_bit(HCI_QUIRK_BDADDR_PROPERTY_BROKEN, &hdev->quirks);
1924
1925                 hci_set_aosp_capable(hdev);
1926
1927                 ret = qca_read_soc_version(hdev, &ver, soc_type);
1928                 if (ret)
1929                         goto out;
1930                 break;
1931
1932         default:
1933                 qca_set_speed(hu, QCA_INIT_SPEED);
1934         }
1935
1936         /* Setup user speed if needed */
1937         speed = qca_get_speed(hu, QCA_OPER_SPEED);
1938         if (speed) {
1939                 ret = qca_set_speed(hu, QCA_OPER_SPEED);
1940                 if (ret)
1941                         goto out;
1942
1943                 qca_baudrate = qca_get_baudrate_value(speed);
1944         }
1945
1946         switch (soc_type) {
1947         case QCA_WCN3988:
1948         case QCA_WCN3990:
1949         case QCA_WCN3991:
1950         case QCA_WCN3998:
1951         case QCA_WCN6750:
1952         case QCA_WCN6855:
1953         case QCA_WCN7850:
1954                 break;
1955
1956         default:
1957                 /* Get QCA version information */
1958                 ret = qca_read_soc_version(hdev, &ver, soc_type);
1959                 if (ret)
1960                         goto out;
1961         }
1962
1963         /* Setup patch / NVM configurations */
1964         ret = qca_uart_setup(hdev, qca_baudrate, soc_type, ver,
1965                         firmware_name);
1966         if (!ret) {
1967                 clear_bit(QCA_IBS_DISABLED, &qca->flags);
1968                 qca_debugfs_init(hdev);
1969                 hu->hdev->hw_error = qca_hw_error;
1970                 hu->hdev->cmd_timeout = qca_cmd_timeout;
1971                 if (hu->serdev) {
1972                         if (device_can_wakeup(hu->serdev->ctrl->dev.parent))
1973                                 hu->hdev->wakeup = qca_wakeup;
1974                 }
1975         } else if (ret == -ENOENT) {
1976                 /* No patch/nvm-config found, run with original fw/config */
1977                 set_bit(QCA_ROM_FW, &qca->flags);
1978                 ret = 0;
1979         } else if (ret == -EAGAIN) {
1980                 /*
1981                  * Userspace firmware loader will return -EAGAIN in case no
1982                  * patch/nvm-config is found, so run with original fw/config.
1983                  */
1984                 set_bit(QCA_ROM_FW, &qca->flags);
1985                 ret = 0;
1986         }
1987
1988 out:
1989         if (ret && retries < MAX_INIT_RETRIES) {
1990                 bt_dev_warn(hdev, "Retry BT power ON:%d", retries);
1991                 qca_power_shutdown(hu);
1992                 if (hu->serdev) {
1993                         serdev_device_close(hu->serdev);
1994                         ret = serdev_device_open(hu->serdev);
1995                         if (ret) {
1996                                 bt_dev_err(hdev, "failed to open port");
1997                                 return ret;
1998                         }
1999                 }
2000                 retries++;
2001                 goto retry;
2002         }
2003
2004         /* Setup bdaddr */
2005         if (soc_type == QCA_ROME)
2006                 hu->hdev->set_bdaddr = qca_set_bdaddr_rome;
2007         else
2008                 hu->hdev->set_bdaddr = qca_set_bdaddr;
2009
2010         if (soc_type == QCA_QCA2066)
2011                 qca_configure_hfp_offload(hdev);
2012
2013         qca->fw_version = le16_to_cpu(ver.patch_ver);
2014         qca->controller_id = le16_to_cpu(ver.rom_ver);
2015         hci_devcd_register(hdev, hci_coredump_qca, qca_dmp_hdr, NULL);
2016
2017         return ret;
2018 }
2019
2020 static const struct hci_uart_proto qca_proto = {
2021         .id             = HCI_UART_QCA,
2022         .name           = "QCA",
2023         .manufacturer   = 29,
2024         .init_speed     = 115200,
2025         .oper_speed     = 3000000,
2026         .open           = qca_open,
2027         .close          = qca_close,
2028         .flush          = qca_flush,
2029         .setup          = qca_setup,
2030         .recv           = qca_recv,
2031         .enqueue        = qca_enqueue,
2032         .dequeue        = qca_dequeue,
2033 };
2034
2035 static const struct qca_device_data qca_soc_data_wcn3988 __maybe_unused = {
2036         .soc_type = QCA_WCN3988,
2037         .vregs = (struct qca_vreg []) {
2038                 { "vddio", 15000  },
2039                 { "vddxo", 80000  },
2040                 { "vddrf", 300000 },
2041                 { "vddch0", 450000 },
2042         },
2043         .num_vregs = 4,
2044 };
2045
2046 static const struct qca_device_data qca_soc_data_wcn3990 __maybe_unused = {
2047         .soc_type = QCA_WCN3990,
2048         .vregs = (struct qca_vreg []) {
2049                 { "vddio", 15000  },
2050                 { "vddxo", 80000  },
2051                 { "vddrf", 300000 },
2052                 { "vddch0", 450000 },
2053         },
2054         .num_vregs = 4,
2055 };
2056
2057 static const struct qca_device_data qca_soc_data_wcn3991 __maybe_unused = {
2058         .soc_type = QCA_WCN3991,
2059         .vregs = (struct qca_vreg []) {
2060                 { "vddio", 15000  },
2061                 { "vddxo", 80000  },
2062                 { "vddrf", 300000 },
2063                 { "vddch0", 450000 },
2064         },
2065         .num_vregs = 4,
2066         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
2067 };
2068
2069 static const struct qca_device_data qca_soc_data_wcn3998 __maybe_unused = {
2070         .soc_type = QCA_WCN3998,
2071         .vregs = (struct qca_vreg []) {
2072                 { "vddio", 10000  },
2073                 { "vddxo", 80000  },
2074                 { "vddrf", 300000 },
2075                 { "vddch0", 450000 },
2076         },
2077         .num_vregs = 4,
2078 };
2079
2080 static const struct qca_device_data qca_soc_data_qca2066 __maybe_unused = {
2081         .soc_type = QCA_QCA2066,
2082         .num_vregs = 0,
2083         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
2084 };
2085
2086 static const struct qca_device_data qca_soc_data_qca6390 __maybe_unused = {
2087         .soc_type = QCA_QCA6390,
2088         .num_vregs = 0,
2089 };
2090
2091 static const struct qca_device_data qca_soc_data_wcn6750 __maybe_unused = {
2092         .soc_type = QCA_WCN6750,
2093         .vregs = (struct qca_vreg []) {
2094                 { "vddio", 5000 },
2095                 { "vddaon", 26000 },
2096                 { "vddbtcxmx", 126000 },
2097                 { "vddrfacmn", 12500 },
2098                 { "vddrfa0p8", 102000 },
2099                 { "vddrfa1p7", 302000 },
2100                 { "vddrfa1p2", 257000 },
2101                 { "vddrfa2p2", 1700000 },
2102                 { "vddasd", 200 },
2103         },
2104         .num_vregs = 9,
2105         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
2106 };
2107
2108 static const struct qca_device_data qca_soc_data_wcn6855 __maybe_unused = {
2109         .soc_type = QCA_WCN6855,
2110         .vregs = (struct qca_vreg []) {
2111                 { "vddio", 5000 },
2112                 { "vddbtcxmx", 126000 },
2113                 { "vddrfacmn", 12500 },
2114                 { "vddrfa0p8", 102000 },
2115                 { "vddrfa1p7", 302000 },
2116                 { "vddrfa1p2", 257000 },
2117         },
2118         .num_vregs = 6,
2119         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
2120 };
2121
2122 static const struct qca_device_data qca_soc_data_wcn7850 __maybe_unused = {
2123         .soc_type = QCA_WCN7850,
2124         .vregs = (struct qca_vreg []) {
2125                 { "vddio", 5000 },
2126                 { "vddaon", 26000 },
2127                 { "vdddig", 126000 },
2128                 { "vddrfa0p8", 102000 },
2129                 { "vddrfa1p2", 257000 },
2130                 { "vddrfa1p9", 302000 },
2131         },
2132         .num_vregs = 6,
2133         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
2134 };
2135
2136 static void qca_power_shutdown(struct hci_uart *hu)
2137 {
2138         struct qca_serdev *qcadev;
2139         struct qca_data *qca = hu->priv;
2140         unsigned long flags;
2141         enum qca_btsoc_type soc_type = qca_soc_type(hu);
2142         bool sw_ctrl_state;
2143         struct qca_power *power;
2144
2145         /* From this point we go into power off state. But serial port is
2146          * still open, stop queueing the IBS data and flush all the buffered
2147          * data in skb's.
2148          */
2149         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
2150         set_bit(QCA_IBS_DISABLED, &qca->flags);
2151         qca_flush(hu);
2152         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
2153
2154         /* Non-serdev device usually is powered by external power
2155          * and don't need additional action in driver for power down
2156          */
2157         if (!hu->serdev)
2158                 return;
2159
2160         qcadev = serdev_device_get_drvdata(hu->serdev);
2161         power = qcadev->bt_power;
2162
2163         if (power && power->pwrseq) {
2164                 pwrseq_power_off(power->pwrseq);
2165                 set_bit(QCA_BT_OFF, &qca->flags);
2166                 return;
2167         }
2168
2169         switch (soc_type) {
2170         case QCA_WCN3988:
2171         case QCA_WCN3990:
2172         case QCA_WCN3991:
2173         case QCA_WCN3998:
2174                 host_set_baudrate(hu, 2400);
2175                 qca_send_power_pulse(hu, false);
2176                 qca_regulator_disable(qcadev);
2177                 break;
2178
2179         case QCA_WCN6750:
2180         case QCA_WCN6855:
2181                 gpiod_set_value_cansleep(qcadev->bt_en, 0);
2182                 msleep(100);
2183                 qca_regulator_disable(qcadev);
2184                 if (qcadev->sw_ctrl) {
2185                         sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl);
2186                         bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state);
2187                 }
2188                 break;
2189
2190         default:
2191                 gpiod_set_value_cansleep(qcadev->bt_en, 0);
2192         }
2193
2194         set_bit(QCA_BT_OFF, &qca->flags);
2195 }
2196
2197 static int qca_power_off(struct hci_dev *hdev)
2198 {
2199         struct hci_uart *hu = hci_get_drvdata(hdev);
2200         struct qca_data *qca = hu->priv;
2201         enum qca_btsoc_type soc_type = qca_soc_type(hu);
2202
2203         hu->hdev->hw_error = NULL;
2204         hu->hdev->cmd_timeout = NULL;
2205
2206         del_timer_sync(&qca->wake_retrans_timer);
2207         del_timer_sync(&qca->tx_idle_timer);
2208
2209         /* Stop sending shutdown command if soc crashes. */
2210         if (soc_type != QCA_ROME
2211                 && qca->memdump_state == QCA_MEMDUMP_IDLE) {
2212                 qca_send_pre_shutdown_cmd(hdev);
2213                 usleep_range(8000, 10000);
2214         }
2215
2216         qca_power_shutdown(hu);
2217         return 0;
2218 }
2219
2220 static int qca_regulator_enable(struct qca_serdev *qcadev)
2221 {
2222         struct qca_power *power = qcadev->bt_power;
2223         int ret;
2224
2225         if (power->pwrseq)
2226                 return pwrseq_power_on(power->pwrseq);
2227
2228         /* Already enabled */
2229         if (power->vregs_on)
2230                 return 0;
2231
2232         BT_DBG("enabling %d regulators)", power->num_vregs);
2233
2234         ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk);
2235         if (ret)
2236                 return ret;
2237
2238         power->vregs_on = true;
2239
2240         ret = clk_prepare_enable(qcadev->susclk);
2241         if (ret)
2242                 qca_regulator_disable(qcadev);
2243
2244         return ret;
2245 }
2246
2247 static void qca_regulator_disable(struct qca_serdev *qcadev)
2248 {
2249         struct qca_power *power;
2250
2251         if (!qcadev)
2252                 return;
2253
2254         power = qcadev->bt_power;
2255
2256         /* Already disabled? */
2257         if (!power->vregs_on)
2258                 return;
2259
2260         regulator_bulk_disable(power->num_vregs, power->vreg_bulk);
2261         power->vregs_on = false;
2262
2263         clk_disable_unprepare(qcadev->susclk);
2264 }
2265
2266 static int qca_init_regulators(struct qca_power *qca,
2267                                 const struct qca_vreg *vregs, size_t num_vregs)
2268 {
2269         struct regulator_bulk_data *bulk;
2270         int ret;
2271         int i;
2272
2273         bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL);
2274         if (!bulk)
2275                 return -ENOMEM;
2276
2277         for (i = 0; i < num_vregs; i++)
2278                 bulk[i].supply = vregs[i].name;
2279
2280         ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk);
2281         if (ret < 0)
2282                 return ret;
2283
2284         for (i = 0; i < num_vregs; i++) {
2285                 ret = regulator_set_load(bulk[i].consumer, vregs[i].load_uA);
2286                 if (ret)
2287                         return ret;
2288         }
2289
2290         qca->vreg_bulk = bulk;
2291         qca->num_vregs = num_vregs;
2292
2293         return 0;
2294 }
2295
2296 static void qca_clk_disable_unprepare(void *data)
2297 {
2298         struct clk *clk = data;
2299
2300         clk_disable_unprepare(clk);
2301 }
2302
2303 static int qca_serdev_probe(struct serdev_device *serdev)
2304 {
2305         struct qca_serdev *qcadev;
2306         struct hci_dev *hdev;
2307         const struct qca_device_data *data;
2308         int err;
2309         bool power_ctrl_enabled = true;
2310
2311         qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);
2312         if (!qcadev)
2313                 return -ENOMEM;
2314
2315         qcadev->serdev_hu.serdev = serdev;
2316         data = device_get_match_data(&serdev->dev);
2317         serdev_device_set_drvdata(serdev, qcadev);
2318         device_property_read_string(&serdev->dev, "firmware-name",
2319                                          &qcadev->firmware_name);
2320         device_property_read_u32(&serdev->dev, "max-speed",
2321                                  &qcadev->oper_speed);
2322         if (!qcadev->oper_speed)
2323                 BT_DBG("UART will pick default operating speed");
2324
2325         qcadev->bdaddr_property_broken = device_property_read_bool(&serdev->dev,
2326                         "qcom,local-bd-address-broken");
2327
2328         if (data)
2329                 qcadev->btsoc_type = data->soc_type;
2330         else
2331                 qcadev->btsoc_type = QCA_ROME;
2332
2333         switch (qcadev->btsoc_type) {
2334         case QCA_WCN3988:
2335         case QCA_WCN3990:
2336         case QCA_WCN3991:
2337         case QCA_WCN3998:
2338         case QCA_WCN6750:
2339         case QCA_WCN6855:
2340         case QCA_WCN7850:
2341         case QCA_QCA6390:
2342                 qcadev->bt_power = devm_kzalloc(&serdev->dev,
2343                                                 sizeof(struct qca_power),
2344                                                 GFP_KERNEL);
2345                 if (!qcadev->bt_power)
2346                         return -ENOMEM;
2347                 break;
2348         default:
2349                 break;
2350         }
2351
2352         switch (qcadev->btsoc_type) {
2353         case QCA_WCN6855:
2354         case QCA_WCN7850:
2355                 if (!device_property_present(&serdev->dev, "enable-gpios")) {
2356                         /*
2357                          * Backward compatibility with old DT sources. If the
2358                          * node doesn't have the 'enable-gpios' property then
2359                          * let's use the power sequencer. Otherwise, let's
2360                          * drive everything outselves.
2361                          */
2362                         qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->dev,
2363                                                                    "bluetooth");
2364                         if (IS_ERR(qcadev->bt_power->pwrseq))
2365                                 return PTR_ERR(qcadev->bt_power->pwrseq);
2366
2367                         break;
2368                 }
2369                 fallthrough;
2370         case QCA_WCN3988:
2371         case QCA_WCN3990:
2372         case QCA_WCN3991:
2373         case QCA_WCN3998:
2374         case QCA_WCN6750:
2375                 qcadev->bt_power->dev = &serdev->dev;
2376                 err = qca_init_regulators(qcadev->bt_power, data->vregs,
2377                                           data->num_vregs);
2378                 if (err) {
2379                         BT_ERR("Failed to init regulators:%d", err);
2380                         return err;
2381                 }
2382
2383                 qcadev->bt_power->vregs_on = false;
2384
2385                 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
2386                                                GPIOD_OUT_LOW);
2387                 if (IS_ERR(qcadev->bt_en) &&
2388                     (data->soc_type == QCA_WCN6750 ||
2389                      data->soc_type == QCA_WCN6855)) {
2390                         dev_err(&serdev->dev, "failed to acquire BT_EN gpio\n");
2391                         return PTR_ERR(qcadev->bt_en);
2392                 }
2393
2394                 if (!qcadev->bt_en)
2395                         power_ctrl_enabled = false;
2396
2397                 qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl",
2398                                                GPIOD_IN);
2399                 if (IS_ERR(qcadev->sw_ctrl) &&
2400                     (data->soc_type == QCA_WCN6750 ||
2401                      data->soc_type == QCA_WCN6855 ||
2402                      data->soc_type == QCA_WCN7850)) {
2403                         dev_err(&serdev->dev, "failed to acquire SW_CTRL gpio\n");
2404                         return PTR_ERR(qcadev->sw_ctrl);
2405                 }
2406
2407                 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
2408                 if (IS_ERR(qcadev->susclk)) {
2409                         dev_err(&serdev->dev, "failed to acquire clk\n");
2410                         return PTR_ERR(qcadev->susclk);
2411                 }
2412                 break;
2413
2414         case QCA_QCA6390:
2415                 if (dev_of_node(&serdev->dev)) {
2416                         qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->dev,
2417                                                                    "bluetooth");
2418                         if (IS_ERR(qcadev->bt_power->pwrseq))
2419                                 return PTR_ERR(qcadev->bt_power->pwrseq);
2420                         break;
2421                 }
2422                 fallthrough;
2423
2424         default:
2425                 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
2426                                                GPIOD_OUT_LOW);
2427                 if (IS_ERR(qcadev->bt_en)) {
2428                         dev_err(&serdev->dev, "failed to acquire enable gpio\n");
2429                         return PTR_ERR(qcadev->bt_en);
2430                 }
2431
2432                 if (!qcadev->bt_en)
2433                         power_ctrl_enabled = false;
2434
2435                 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
2436                 if (IS_ERR(qcadev->susclk)) {
2437                         dev_warn(&serdev->dev, "failed to acquire clk\n");
2438                         return PTR_ERR(qcadev->susclk);
2439                 }
2440                 err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);
2441                 if (err)
2442                         return err;
2443
2444                 err = clk_prepare_enable(qcadev->susclk);
2445                 if (err)
2446                         return err;
2447
2448                 err = devm_add_action_or_reset(&serdev->dev,
2449                                                qca_clk_disable_unprepare,
2450                                                qcadev->susclk);
2451                 if (err)
2452                         return err;
2453
2454         }
2455
2456         err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
2457         if (err) {
2458                 BT_ERR("serdev registration failed");
2459                 return err;
2460         }
2461
2462         hdev = qcadev->serdev_hu.hdev;
2463
2464         if (power_ctrl_enabled) {
2465                 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
2466                 hdev->shutdown = qca_power_off;
2467         }
2468
2469         if (data) {
2470                 /* Wideband speech support must be set per driver since it can't
2471                  * be queried via hci. Same with the valid le states quirk.
2472                  */
2473                 if (data->capabilities & QCA_CAP_WIDEBAND_SPEECH)
2474                         set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,
2475                                 &hdev->quirks);
2476
2477                 if (data->capabilities & QCA_CAP_VALID_LE_STATES)
2478                         set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
2479         }
2480
2481         return 0;
2482 }
2483
2484 static void qca_serdev_remove(struct serdev_device *serdev)
2485 {
2486         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2487         struct qca_power *power = qcadev->bt_power;
2488
2489         switch (qcadev->btsoc_type) {
2490         case QCA_WCN3988:
2491         case QCA_WCN3990:
2492         case QCA_WCN3991:
2493         case QCA_WCN3998:
2494         case QCA_WCN6750:
2495         case QCA_WCN6855:
2496         case QCA_WCN7850:
2497                 if (power->vregs_on)
2498                         qca_power_shutdown(&qcadev->serdev_hu);
2499                 break;
2500         default:
2501                 break;
2502         }
2503
2504         hci_uart_unregister_device(&qcadev->serdev_hu);
2505 }
2506
2507 static void qca_serdev_shutdown(struct device *dev)
2508 {
2509         int ret;
2510         int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
2511         struct serdev_device *serdev = to_serdev_device(dev);
2512         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2513         struct hci_uart *hu = &qcadev->serdev_hu;
2514         struct hci_dev *hdev = hu->hdev;
2515         const u8 ibs_wake_cmd[] = { 0xFD };
2516         const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 };
2517
2518         if (qcadev->btsoc_type == QCA_QCA6390) {
2519                 /* The purpose of sending the VSC is to reset SOC into a initial
2520                  * state and the state will ensure next hdev->setup() success.
2521                  * if HCI_QUIRK_NON_PERSISTENT_SETUP is set, it means that
2522                  * hdev->setup() can do its job regardless of SoC state, so
2523                  * don't need to send the VSC.
2524                  * if HCI_SETUP is set, it means that hdev->setup() was never
2525                  * invoked and the SOC is already in the initial state, so
2526                  * don't also need to send the VSC.
2527                  */
2528                 if (test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks) ||
2529                     hci_dev_test_flag(hdev, HCI_SETUP))
2530                         return;
2531
2532                 /* The serdev must be in open state when conrol logic arrives
2533                  * here, so also fix the use-after-free issue caused by that
2534                  * the serdev is flushed or wrote after it is closed.
2535                  */
2536                 serdev_device_write_flush(serdev);
2537                 ret = serdev_device_write_buf(serdev, ibs_wake_cmd,
2538                                               sizeof(ibs_wake_cmd));
2539                 if (ret < 0) {
2540                         BT_ERR("QCA send IBS_WAKE_IND error: %d", ret);
2541                         return;
2542                 }
2543                 serdev_device_wait_until_sent(serdev, timeout);
2544                 usleep_range(8000, 10000);
2545
2546                 serdev_device_write_flush(serdev);
2547                 ret = serdev_device_write_buf(serdev, edl_reset_soc_cmd,
2548                                               sizeof(edl_reset_soc_cmd));
2549                 if (ret < 0) {
2550                         BT_ERR("QCA send EDL_RESET_REQ error: %d", ret);
2551                         return;
2552                 }
2553                 serdev_device_wait_until_sent(serdev, timeout);
2554                 usleep_range(8000, 10000);
2555         }
2556 }
2557
2558 static int __maybe_unused qca_suspend(struct device *dev)
2559 {
2560         struct serdev_device *serdev = to_serdev_device(dev);
2561         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2562         struct hci_uart *hu = &qcadev->serdev_hu;
2563         struct qca_data *qca = hu->priv;
2564         unsigned long flags;
2565         bool tx_pending = false;
2566         int ret = 0;
2567         u8 cmd;
2568         u32 wait_timeout = 0;
2569
2570         set_bit(QCA_SUSPENDING, &qca->flags);
2571
2572         /* if BT SoC is running with default firmware then it does not
2573          * support in-band sleep
2574          */
2575         if (test_bit(QCA_ROM_FW, &qca->flags))
2576                 return 0;
2577
2578         /* During SSR after memory dump collection, controller will be
2579          * powered off and then powered on.If controller is powered off
2580          * during SSR then we should wait until SSR is completed.
2581          */
2582         if (test_bit(QCA_BT_OFF, &qca->flags) &&
2583             !test_bit(QCA_SSR_TRIGGERED, &qca->flags))
2584                 return 0;
2585
2586         if (test_bit(QCA_IBS_DISABLED, &qca->flags) ||
2587             test_bit(QCA_SSR_TRIGGERED, &qca->flags)) {
2588                 wait_timeout = test_bit(QCA_SSR_TRIGGERED, &qca->flags) ?
2589                                         IBS_DISABLE_SSR_TIMEOUT_MS :
2590                                         FW_DOWNLOAD_TIMEOUT_MS;
2591
2592                 /* QCA_IBS_DISABLED flag is set to true, During FW download
2593                  * and during memory dump collection. It is reset to false,
2594                  * After FW download complete.
2595                  */
2596                 wait_on_bit_timeout(&qca->flags, QCA_IBS_DISABLED,
2597                             TASK_UNINTERRUPTIBLE, msecs_to_jiffies(wait_timeout));
2598
2599                 if (test_bit(QCA_IBS_DISABLED, &qca->flags)) {
2600                         bt_dev_err(hu->hdev, "SSR or FW download time out");
2601                         ret = -ETIMEDOUT;
2602                         goto error;
2603                 }
2604         }
2605
2606         cancel_work_sync(&qca->ws_awake_device);
2607         cancel_work_sync(&qca->ws_awake_rx);
2608
2609         spin_lock_irqsave_nested(&qca->hci_ibs_lock,
2610                                  flags, SINGLE_DEPTH_NESTING);
2611
2612         switch (qca->tx_ibs_state) {
2613         case HCI_IBS_TX_WAKING:
2614                 del_timer(&qca->wake_retrans_timer);
2615                 fallthrough;
2616         case HCI_IBS_TX_AWAKE:
2617                 del_timer(&qca->tx_idle_timer);
2618
2619                 serdev_device_write_flush(hu->serdev);
2620                 cmd = HCI_IBS_SLEEP_IND;
2621                 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
2622
2623                 if (ret < 0) {
2624                         BT_ERR("Failed to send SLEEP to device");
2625                         break;
2626                 }
2627
2628                 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
2629                 qca->ibs_sent_slps++;
2630                 tx_pending = true;
2631                 break;
2632
2633         case HCI_IBS_TX_ASLEEP:
2634                 break;
2635
2636         default:
2637                 BT_ERR("Spurious tx state %d", qca->tx_ibs_state);
2638                 ret = -EINVAL;
2639                 break;
2640         }
2641
2642         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
2643
2644         if (ret < 0)
2645                 goto error;
2646
2647         if (tx_pending) {
2648                 serdev_device_wait_until_sent(hu->serdev,
2649                                               msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
2650                 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
2651         }
2652
2653         /* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going
2654          * to sleep, so that the packet does not wake the system later.
2655          */
2656         ret = wait_event_interruptible_timeout(qca->suspend_wait_q,
2657                         qca->rx_ibs_state == HCI_IBS_RX_ASLEEP,
2658                         msecs_to_jiffies(IBS_BTSOC_TX_IDLE_TIMEOUT_MS));
2659         if (ret == 0) {
2660                 ret = -ETIMEDOUT;
2661                 goto error;
2662         }
2663
2664         return 0;
2665
2666 error:
2667         clear_bit(QCA_SUSPENDING, &qca->flags);
2668
2669         return ret;
2670 }
2671
2672 static int __maybe_unused qca_resume(struct device *dev)
2673 {
2674         struct serdev_device *serdev = to_serdev_device(dev);
2675         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2676         struct hci_uart *hu = &qcadev->serdev_hu;
2677         struct qca_data *qca = hu->priv;
2678
2679         clear_bit(QCA_SUSPENDING, &qca->flags);
2680
2681         return 0;
2682 }
2683
2684 static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume);
2685
2686 #ifdef CONFIG_OF
2687 static const struct of_device_id qca_bluetooth_of_match[] = {
2688         { .compatible = "qcom,qca2066-bt", .data = &qca_soc_data_qca2066},
2689         { .compatible = "qcom,qca6174-bt" },
2690         { .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390},
2691         { .compatible = "qcom,qca9377-bt" },
2692         { .compatible = "qcom,wcn3988-bt", .data = &qca_soc_data_wcn3988},
2693         { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990},
2694         { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991},
2695         { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998},
2696         { .compatible = "qcom,wcn6750-bt", .data = &qca_soc_data_wcn6750},
2697         { .compatible = "qcom,wcn6855-bt", .data = &qca_soc_data_wcn6855},
2698         { .compatible = "qcom,wcn7850-bt", .data = &qca_soc_data_wcn7850},
2699         { /* sentinel */ }
2700 };
2701 MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);
2702 #endif
2703
2704 #ifdef CONFIG_ACPI
2705 static const struct acpi_device_id qca_bluetooth_acpi_match[] = {
2706         { "QCOM2066", (kernel_ulong_t)&qca_soc_data_qca2066 },
2707         { "QCOM6390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2708         { "DLA16390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2709         { "DLB16390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2710         { "DLB26390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2711         { },
2712 };
2713 MODULE_DEVICE_TABLE(acpi, qca_bluetooth_acpi_match);
2714 #endif
2715
2716 #ifdef CONFIG_DEV_COREDUMP
2717 static void hciqca_coredump(struct device *dev)
2718 {
2719         struct serdev_device *serdev = to_serdev_device(dev);
2720         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2721         struct hci_uart *hu = &qcadev->serdev_hu;
2722         struct hci_dev  *hdev = hu->hdev;
2723
2724         if (hdev->dump.coredump)
2725                 hdev->dump.coredump(hdev);
2726 }
2727 #endif
2728
2729 static struct serdev_device_driver qca_serdev_driver = {
2730         .probe = qca_serdev_probe,
2731         .remove = qca_serdev_remove,
2732         .driver = {
2733                 .name = "hci_uart_qca",
2734                 .of_match_table = of_match_ptr(qca_bluetooth_of_match),
2735                 .acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match),
2736                 .shutdown = qca_serdev_shutdown,
2737                 .pm = &qca_pm_ops,
2738 #ifdef CONFIG_DEV_COREDUMP
2739                 .coredump = hciqca_coredump,
2740 #endif
2741         },
2742 };
2743
2744 int __init qca_init(void)
2745 {
2746         serdev_device_driver_register(&qca_serdev_driver);
2747
2748         return hci_uart_register_proto(&qca_proto);
2749 }
2750
2751 int __exit qca_deinit(void)
2752 {
2753         serdev_device_driver_unregister(&qca_serdev_driver);
2754
2755         return hci_uart_unregister_proto(&qca_proto);
2756 }