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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Texas Instruments' Bluetooth HCILL UART protocol4 *5 * HCILL (HCI Low Level) is a Texas Instruments' power management6 * protocol extension to H4.7 *8 * Copyright (C) 2007 Texas Instruments, Inc.9 *10 * Written by Ohad Ben-Cohen <ohad@bencohen.org>11 *12 * Acknowledgements:13 * This file is based on hci_h4.c, which was written14 * by Maxim Krasnyansky and Marcel Holtmann.15 */16 17#include <linux/module.h>18#include <linux/kernel.h>19 20#include <linux/init.h>21#include <linux/sched.h>22#include <linux/types.h>23#include <linux/fcntl.h>24#include <linux/firmware.h>25#include <linux/interrupt.h>26#include <linux/ptrace.h>27#include <linux/poll.h>28 29#include <linux/slab.h>30#include <linux/errno.h>31#include <linux/string.h>32#include <linux/signal.h>33#include <linux/ioctl.h>34#include <linux/of.h>35#include <linux/serdev.h>36#include <linux/skbuff.h>37#include <linux/ti_wilink_st.h>38#include <linux/clk.h>39 40#include <net/bluetooth/bluetooth.h>41#include <net/bluetooth/hci_core.h>42#include <linux/gpio/consumer.h>43#include <linux/nvmem-consumer.h>44 45#include "hci_uart.h"46 47/* Vendor-specific HCI commands */48#define HCI_VS_WRITE_BD_ADDR 0xfc0649#define HCI_VS_UPDATE_UART_HCI_BAUDRATE 0xff3650 51/* HCILL commands */52#define HCILL_GO_TO_SLEEP_IND 0x3053#define HCILL_GO_TO_SLEEP_ACK 0x3154#define HCILL_WAKE_UP_IND 0x3255#define HCILL_WAKE_UP_ACK 0x3356 57/* HCILL states */58enum hcill_states_e {59 HCILL_ASLEEP,60 HCILL_ASLEEP_TO_AWAKE,61 HCILL_AWAKE,62 HCILL_AWAKE_TO_ASLEEP63};64 65struct ll_device {66 struct hci_uart hu;67 struct serdev_device *serdev;68 struct gpio_desc *enable_gpio;69 struct clk *ext_clk;70 bdaddr_t bdaddr;71};72 73struct ll_struct {74 struct sk_buff *rx_skb;75 struct sk_buff_head txq;76 spinlock_t hcill_lock; /* HCILL state lock */77 unsigned long hcill_state; /* HCILL power state */78 struct sk_buff_head tx_wait_q; /* HCILL wait queue */79};80 81/*82 * Builds and sends an HCILL command packet.83 * These are very simple packets with only 1 cmd byte84 */85static int send_hcill_cmd(u8 cmd, struct hci_uart *hu)86{87 int err = 0;88 struct sk_buff *skb = NULL;89 struct ll_struct *ll = hu->priv;90 91 BT_DBG("hu %p cmd 0x%x", hu, cmd);92 93 /* allocate packet */94 skb = bt_skb_alloc(1, GFP_ATOMIC);95 if (!skb) {96 BT_ERR("cannot allocate memory for HCILL packet");97 err = -ENOMEM;98 goto out;99 }100 101 /* prepare packet */102 skb_put_u8(skb, cmd);103 104 /* send packet */105 skb_queue_tail(&ll->txq, skb);106out:107 return err;108}109 110/* Initialize protocol */111static int ll_open(struct hci_uart *hu)112{113 struct ll_struct *ll;114 115 BT_DBG("hu %p", hu);116 117 ll = kzalloc(sizeof(*ll), GFP_KERNEL);118 if (!ll)119 return -ENOMEM;120 121 skb_queue_head_init(&ll->txq);122 skb_queue_head_init(&ll->tx_wait_q);123 spin_lock_init(&ll->hcill_lock);124 125 ll->hcill_state = HCILL_AWAKE;126 127 hu->priv = ll;128 129 if (hu->serdev) {130 struct ll_device *lldev = serdev_device_get_drvdata(hu->serdev);131 132 if (!IS_ERR(lldev->ext_clk))133 clk_prepare_enable(lldev->ext_clk);134 }135 136 return 0;137}138 139/* Flush protocol data */140static int ll_flush(struct hci_uart *hu)141{142 struct ll_struct *ll = hu->priv;143 144 BT_DBG("hu %p", hu);145 146 skb_queue_purge(&ll->tx_wait_q);147 skb_queue_purge(&ll->txq);148 149 return 0;150}151 152/* Close protocol */153static int ll_close(struct hci_uart *hu)154{155 struct ll_struct *ll = hu->priv;156 157 BT_DBG("hu %p", hu);158 159 skb_queue_purge(&ll->tx_wait_q);160 skb_queue_purge(&ll->txq);161 162 kfree_skb(ll->rx_skb);163 164 if (hu->serdev) {165 struct ll_device *lldev = serdev_device_get_drvdata(hu->serdev);166 167 gpiod_set_value_cansleep(lldev->enable_gpio, 0);168 169 clk_disable_unprepare(lldev->ext_clk);170 }171 172 hu->priv = NULL;173 174 kfree(ll);175 176 return 0;177}178 179/*180 * internal function, which does common work of the device wake up process:181 * 1. places all pending packets (waiting in tx_wait_q list) in txq list.182 * 2. changes internal state to HCILL_AWAKE.183 * Note: assumes that hcill_lock spinlock is taken,184 * shouldn't be called otherwise!185 */186static void __ll_do_awake(struct ll_struct *ll)187{188 struct sk_buff *skb = NULL;189 190 while ((skb = skb_dequeue(&ll->tx_wait_q)))191 skb_queue_tail(&ll->txq, skb);192 193 ll->hcill_state = HCILL_AWAKE;194}195 196/*197 * Called upon a wake-up-indication from the device198 */199static void ll_device_want_to_wakeup(struct hci_uart *hu)200{201 unsigned long flags;202 struct ll_struct *ll = hu->priv;203 204 BT_DBG("hu %p", hu);205 206 /* lock hcill state */207 spin_lock_irqsave(&ll->hcill_lock, flags);208 209 switch (ll->hcill_state) {210 case HCILL_ASLEEP_TO_AWAKE:211 /*212 * This state means that both the host and the BRF chip213 * have simultaneously sent a wake-up-indication packet.214 * Traditionally, in this case, receiving a wake-up-indication215 * was enough and an additional wake-up-ack wasn't needed.216 * This has changed with the BRF6350, which does require an217 * explicit wake-up-ack. Other BRF versions, which do not218 * require an explicit ack here, do accept it, thus it is219 * perfectly safe to always send one.220 */221 BT_DBG("dual wake-up-indication");222 fallthrough;223 case HCILL_ASLEEP:224 /* acknowledge device wake up */225 if (send_hcill_cmd(HCILL_WAKE_UP_ACK, hu) < 0) {226 BT_ERR("cannot acknowledge device wake up");227 goto out;228 }229 break;230 default:231 /* any other state is illegal */232 BT_ERR("received HCILL_WAKE_UP_IND in state %ld",233 ll->hcill_state);234 break;235 }236 237 /* send pending packets and change state to HCILL_AWAKE */238 __ll_do_awake(ll);239 240out:241 spin_unlock_irqrestore(&ll->hcill_lock, flags);242 243 /* actually send the packets */244 hci_uart_tx_wakeup(hu);245}246 247/*248 * Called upon a sleep-indication from the device249 */250static void ll_device_want_to_sleep(struct hci_uart *hu)251{252 unsigned long flags;253 struct ll_struct *ll = hu->priv;254 255 BT_DBG("hu %p", hu);256 257 /* lock hcill state */258 spin_lock_irqsave(&ll->hcill_lock, flags);259 260 /* sanity check */261 if (ll->hcill_state != HCILL_AWAKE)262 BT_ERR("ERR: HCILL_GO_TO_SLEEP_IND in state %ld",263 ll->hcill_state);264 265 /* acknowledge device sleep */266 if (send_hcill_cmd(HCILL_GO_TO_SLEEP_ACK, hu) < 0) {267 BT_ERR("cannot acknowledge device sleep");268 goto out;269 }270 271 /* update state */272 ll->hcill_state = HCILL_ASLEEP;273 274out:275 spin_unlock_irqrestore(&ll->hcill_lock, flags);276 277 /* actually send the sleep ack packet */278 hci_uart_tx_wakeup(hu);279}280 281/*282 * Called upon wake-up-acknowledgement from the device283 */284static void ll_device_woke_up(struct hci_uart *hu)285{286 unsigned long flags;287 struct ll_struct *ll = hu->priv;288 289 BT_DBG("hu %p", hu);290 291 /* lock hcill state */292 spin_lock_irqsave(&ll->hcill_lock, flags);293 294 /* sanity check */295 if (ll->hcill_state != HCILL_ASLEEP_TO_AWAKE)296 BT_ERR("received HCILL_WAKE_UP_ACK in state %ld",297 ll->hcill_state);298 299 /* send pending packets and change state to HCILL_AWAKE */300 __ll_do_awake(ll);301 302 spin_unlock_irqrestore(&ll->hcill_lock, flags);303 304 /* actually send the packets */305 hci_uart_tx_wakeup(hu);306}307 308/* Enqueue frame for transmittion (padding, crc, etc) */309/* may be called from two simultaneous tasklets */310static int ll_enqueue(struct hci_uart *hu, struct sk_buff *skb)311{312 unsigned long flags = 0;313 struct ll_struct *ll = hu->priv;314 315 BT_DBG("hu %p skb %p", hu, skb);316 317 /* Prepend skb with frame type */318 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);319 320 /* lock hcill state */321 spin_lock_irqsave(&ll->hcill_lock, flags);322 323 /* act according to current state */324 switch (ll->hcill_state) {325 case HCILL_AWAKE:326 BT_DBG("device awake, sending normally");327 skb_queue_tail(&ll->txq, skb);328 break;329 case HCILL_ASLEEP:330 BT_DBG("device asleep, waking up and queueing packet");331 /* save packet for later */332 skb_queue_tail(&ll->tx_wait_q, skb);333 /* awake device */334 if (send_hcill_cmd(HCILL_WAKE_UP_IND, hu) < 0) {335 BT_ERR("cannot wake up device");336 break;337 }338 ll->hcill_state = HCILL_ASLEEP_TO_AWAKE;339 break;340 case HCILL_ASLEEP_TO_AWAKE:341 BT_DBG("device waking up, queueing packet");342 /* transient state; just keep packet for later */343 skb_queue_tail(&ll->tx_wait_q, skb);344 break;345 default:346 BT_ERR("illegal hcill state: %ld (losing packet)",347 ll->hcill_state);348 dev_kfree_skb_irq(skb);349 break;350 }351 352 spin_unlock_irqrestore(&ll->hcill_lock, flags);353 354 return 0;355}356 357static int ll_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)358{359 struct hci_uart *hu = hci_get_drvdata(hdev);360 struct ll_struct *ll = hu->priv;361 362 switch (hci_skb_pkt_type(skb)) {363 case HCILL_GO_TO_SLEEP_IND:364 BT_DBG("HCILL_GO_TO_SLEEP_IND packet");365 ll_device_want_to_sleep(hu);366 break;367 case HCILL_GO_TO_SLEEP_ACK:368 /* shouldn't happen */369 bt_dev_err(hdev, "received HCILL_GO_TO_SLEEP_ACK in state %ld",370 ll->hcill_state);371 break;372 case HCILL_WAKE_UP_IND:373 BT_DBG("HCILL_WAKE_UP_IND packet");374 ll_device_want_to_wakeup(hu);375 break;376 case HCILL_WAKE_UP_ACK:377 BT_DBG("HCILL_WAKE_UP_ACK packet");378 ll_device_woke_up(hu);379 break;380 }381 382 kfree_skb(skb);383 return 0;384}385 386#define LL_RECV_SLEEP_IND \387 .type = HCILL_GO_TO_SLEEP_IND, \388 .hlen = 0, \389 .loff = 0, \390 .lsize = 0, \391 .maxlen = 0392 393#define LL_RECV_SLEEP_ACK \394 .type = HCILL_GO_TO_SLEEP_ACK, \395 .hlen = 0, \396 .loff = 0, \397 .lsize = 0, \398 .maxlen = 0399 400#define LL_RECV_WAKE_IND \401 .type = HCILL_WAKE_UP_IND, \402 .hlen = 0, \403 .loff = 0, \404 .lsize = 0, \405 .maxlen = 0406 407#define LL_RECV_WAKE_ACK \408 .type = HCILL_WAKE_UP_ACK, \409 .hlen = 0, \410 .loff = 0, \411 .lsize = 0, \412 .maxlen = 0413 414static const struct h4_recv_pkt ll_recv_pkts[] = {415 { H4_RECV_ACL, .recv = hci_recv_frame },416 { H4_RECV_SCO, .recv = hci_recv_frame },417 { H4_RECV_EVENT, .recv = hci_recv_frame },418 { LL_RECV_SLEEP_IND, .recv = ll_recv_frame },419 { LL_RECV_SLEEP_ACK, .recv = ll_recv_frame },420 { LL_RECV_WAKE_IND, .recv = ll_recv_frame },421 { LL_RECV_WAKE_ACK, .recv = ll_recv_frame },422};423 424/* Recv data */425static int ll_recv(struct hci_uart *hu, const void *data, int count)426{427 struct ll_struct *ll = hu->priv;428 429 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))430 return -EUNATCH;431 432 ll->rx_skb = h4_recv_buf(hu->hdev, ll->rx_skb, data, count,433 ll_recv_pkts, ARRAY_SIZE(ll_recv_pkts));434 if (IS_ERR(ll->rx_skb)) {435 int err = PTR_ERR(ll->rx_skb);436 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);437 ll->rx_skb = NULL;438 return err;439 }440 441 return count;442}443 444static struct sk_buff *ll_dequeue(struct hci_uart *hu)445{446 struct ll_struct *ll = hu->priv;447 448 return skb_dequeue(&ll->txq);449}450 451#if IS_ENABLED(CONFIG_SERIAL_DEV_BUS)452static int read_local_version(struct hci_dev *hdev)453{454 int err = 0;455 unsigned short version = 0;456 struct sk_buff *skb;457 struct hci_rp_read_local_version *ver;458 459 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,460 HCI_INIT_TIMEOUT);461 if (IS_ERR(skb)) {462 bt_dev_err(hdev, "Reading TI version information failed (%ld)",463 PTR_ERR(skb));464 return PTR_ERR(skb);465 }466 if (skb->len != sizeof(*ver)) {467 err = -EILSEQ;468 goto out;469 }470 471 ver = (struct hci_rp_read_local_version *)skb->data;472 if (le16_to_cpu(ver->manufacturer) != 13) {473 err = -ENODEV;474 goto out;475 }476 477 version = le16_to_cpu(ver->lmp_subver);478 479out:480 if (err)481 bt_dev_err(hdev, "Failed to read TI version info: %d", err);482 kfree_skb(skb);483 return err ? err : version;484}485 486static int send_command_from_firmware(struct ll_device *lldev,487 struct hci_command *cmd)488{489 struct sk_buff *skb;490 491 if (cmd->opcode == HCI_VS_UPDATE_UART_HCI_BAUDRATE) {492 /* ignore remote change493 * baud rate HCI VS command494 */495 bt_dev_warn(lldev->hu.hdev,496 "change remote baud rate command in firmware");497 return 0;498 }499 if (cmd->prefix != 1)500 bt_dev_dbg(lldev->hu.hdev, "command type %d", cmd->prefix);501 502 skb = __hci_cmd_sync(lldev->hu.hdev, cmd->opcode, cmd->plen,503 &cmd->speed, HCI_INIT_TIMEOUT);504 if (IS_ERR(skb)) {505 bt_dev_err(lldev->hu.hdev, "send command failed");506 return PTR_ERR(skb);507 }508 kfree_skb(skb);509 return 0;510}511 512/*513 * download_firmware -514 * internal function which parses through the .bts firmware515 * script file intreprets SEND, DELAY actions only as of now516 */517static int download_firmware(struct ll_device *lldev)518{519 unsigned short chip, min_ver, maj_ver;520 int version, err, len;521 unsigned char *ptr, *action_ptr;522 unsigned char bts_scr_name[40]; /* 40 char long bts scr name? */523 const struct firmware *fw;524 struct hci_command *cmd;525 526 version = read_local_version(lldev->hu.hdev);527 if (version < 0)528 return version;529 530 chip = (version & 0x7C00) >> 10;531 min_ver = (version & 0x007F);532 maj_ver = (version & 0x0380) >> 7;533 if (version & 0x8000)534 maj_ver |= 0x0008;535 536 snprintf(bts_scr_name, sizeof(bts_scr_name),537 "ti-connectivity/TIInit_%d.%d.%d.bts",538 chip, maj_ver, min_ver);539 540 err = request_firmware(&fw, bts_scr_name, &lldev->serdev->dev);541 if (err || !fw->data || !fw->size) {542 bt_dev_err(lldev->hu.hdev, "request_firmware failed(errno %d) for %s",543 err, bts_scr_name);544 return -EINVAL;545 }546 ptr = (void *)fw->data;547 len = fw->size;548 /* bts_header to remove out magic number and549 * version550 */551 ptr += sizeof(struct bts_header);552 len -= sizeof(struct bts_header);553 554 while (len > 0 && ptr) {555 bt_dev_dbg(lldev->hu.hdev, " action size %d, type %d ",556 ((struct bts_action *)ptr)->size,557 ((struct bts_action *)ptr)->type);558 559 action_ptr = &(((struct bts_action *)ptr)->data[0]);560 561 switch (((struct bts_action *)ptr)->type) {562 case ACTION_SEND_COMMAND: /* action send */563 bt_dev_dbg(lldev->hu.hdev, "S");564 cmd = (struct hci_command *)action_ptr;565 err = send_command_from_firmware(lldev, cmd);566 if (err)567 goto out_rel_fw;568 break;569 case ACTION_WAIT_EVENT: /* wait */570 /* no need to wait as command was synchronous */571 bt_dev_dbg(lldev->hu.hdev, "W");572 break;573 case ACTION_DELAY: /* sleep */574 bt_dev_info(lldev->hu.hdev, "sleep command in scr");575 msleep(((struct bts_action_delay *)action_ptr)->msec);576 break;577 }578 len -= (sizeof(struct bts_action) +579 ((struct bts_action *)ptr)->size);580 ptr += sizeof(struct bts_action) +581 ((struct bts_action *)ptr)->size;582 }583 584out_rel_fw:585 /* fw download complete */586 release_firmware(fw);587 return err;588}589 590static int ll_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)591{592 bdaddr_t bdaddr_swapped;593 struct sk_buff *skb;594 595 /* HCI_VS_WRITE_BD_ADDR (at least on a CC2560A chip) expects the BD596 * address to be MSB first, but bdaddr_t has the convention of being597 * LSB first.598 */599 baswap(&bdaddr_swapped, bdaddr);600 skb = __hci_cmd_sync(hdev, HCI_VS_WRITE_BD_ADDR, sizeof(bdaddr_t),601 &bdaddr_swapped, HCI_INIT_TIMEOUT);602 if (!IS_ERR(skb))603 kfree_skb(skb);604 605 return PTR_ERR_OR_ZERO(skb);606}607 608static int ll_setup(struct hci_uart *hu)609{610 int err, retry = 3;611 struct ll_device *lldev;612 struct serdev_device *serdev = hu->serdev;613 u32 speed;614 615 if (!serdev)616 return 0;617 618 lldev = serdev_device_get_drvdata(serdev);619 620 hu->hdev->set_bdaddr = ll_set_bdaddr;621 622 serdev_device_set_flow_control(serdev, true);623 624 do {625 /* Reset the Bluetooth device */626 gpiod_set_value_cansleep(lldev->enable_gpio, 0);627 msleep(5);628 gpiod_set_value_cansleep(lldev->enable_gpio, 1);629 mdelay(100);630 err = serdev_device_wait_for_cts(serdev, true, 200);631 if (err) {632 bt_dev_err(hu->hdev, "Failed to get CTS");633 return err;634 }635 636 err = download_firmware(lldev);637 if (!err)638 break;639 640 /* Toggle BT_EN and retry */641 bt_dev_err(hu->hdev, "download firmware failed, retrying...");642 } while (retry--);643 644 if (err)645 return err;646 647 /* Set BD address if one was specified at probe */648 if (!bacmp(&lldev->bdaddr, BDADDR_NONE)) {649 /* This means that there was an error getting the BD address650 * during probe, so mark the device as having a bad address.651 */652 set_bit(HCI_QUIRK_INVALID_BDADDR, &hu->hdev->quirks);653 } else if (bacmp(&lldev->bdaddr, BDADDR_ANY)) {654 err = ll_set_bdaddr(hu->hdev, &lldev->bdaddr);655 if (err)656 set_bit(HCI_QUIRK_INVALID_BDADDR, &hu->hdev->quirks);657 }658 659 /* Operational speed if any */660 if (hu->oper_speed)661 speed = hu->oper_speed;662 else if (hu->proto->oper_speed)663 speed = hu->proto->oper_speed;664 else665 speed = 0;666 667 if (speed) {668 __le32 speed_le = cpu_to_le32(speed);669 struct sk_buff *skb;670 671 skb = __hci_cmd_sync(hu->hdev, HCI_VS_UPDATE_UART_HCI_BAUDRATE,672 sizeof(speed_le), &speed_le,673 HCI_INIT_TIMEOUT);674 if (!IS_ERR(skb)) {675 kfree_skb(skb);676 serdev_device_set_baudrate(serdev, speed);677 }678 }679 680 return 0;681}682 683static const struct hci_uart_proto llp;684 685static int hci_ti_probe(struct serdev_device *serdev)686{687 struct hci_uart *hu;688 struct ll_device *lldev;689 struct nvmem_cell *bdaddr_cell;690 u32 max_speed = 3000000;691 692 lldev = devm_kzalloc(&serdev->dev, sizeof(struct ll_device), GFP_KERNEL);693 if (!lldev)694 return -ENOMEM;695 hu = &lldev->hu;696 697 serdev_device_set_drvdata(serdev, lldev);698 lldev->serdev = hu->serdev = serdev;699 700 lldev->enable_gpio = devm_gpiod_get_optional(&serdev->dev,701 "enable",702 GPIOD_OUT_LOW);703 if (IS_ERR(lldev->enable_gpio))704 return PTR_ERR(lldev->enable_gpio);705 706 lldev->ext_clk = devm_clk_get(&serdev->dev, "ext_clock");707 if (IS_ERR(lldev->ext_clk) && PTR_ERR(lldev->ext_clk) != -ENOENT)708 return PTR_ERR(lldev->ext_clk);709 710 of_property_read_u32(serdev->dev.of_node, "max-speed", &max_speed);711 hci_uart_set_speeds(hu, 115200, max_speed);712 713 /* optional BD address from nvram */714 bdaddr_cell = nvmem_cell_get(&serdev->dev, "bd-address");715 if (IS_ERR(bdaddr_cell)) {716 int err = PTR_ERR(bdaddr_cell);717 718 if (err == -EPROBE_DEFER)719 return err;720 721 /* ENOENT means there is no matching nvmem cell and ENOSYS722 * means that nvmem is not enabled in the kernel configuration.723 */724 if (err != -ENOENT && err != -ENOSYS) {725 /* If there was some other error, give userspace a726 * chance to fix the problem instead of failing to load727 * the driver. Using BDADDR_NONE as a flag that is728 * tested later in the setup function.729 */730 dev_warn(&serdev->dev,731 "Failed to get \"bd-address\" nvmem cell (%d)\n",732 err);733 bacpy(&lldev->bdaddr, BDADDR_NONE);734 }735 } else {736 bdaddr_t *bdaddr;737 size_t len;738 739 bdaddr = nvmem_cell_read(bdaddr_cell, &len);740 nvmem_cell_put(bdaddr_cell);741 if (IS_ERR(bdaddr)) {742 dev_err(&serdev->dev, "Failed to read nvmem bd-address\n");743 return PTR_ERR(bdaddr);744 }745 if (len != sizeof(bdaddr_t)) {746 dev_err(&serdev->dev, "Invalid nvmem bd-address length\n");747 kfree(bdaddr);748 return -EINVAL;749 }750 751 /* As per the device tree bindings, the value from nvmem is752 * expected to be MSB first, but in the kernel it is expected753 * that bdaddr_t is LSB first.754 */755 baswap(&lldev->bdaddr, bdaddr);756 kfree(bdaddr);757 }758 759 return hci_uart_register_device(hu, &llp);760}761 762static void hci_ti_remove(struct serdev_device *serdev)763{764 struct ll_device *lldev = serdev_device_get_drvdata(serdev);765 766 hci_uart_unregister_device(&lldev->hu);767}768 769static const struct of_device_id hci_ti_of_match[] = {770 { .compatible = "ti,cc2560" },771 { .compatible = "ti,wl1271-st" },772 { .compatible = "ti,wl1273-st" },773 { .compatible = "ti,wl1281-st" },774 { .compatible = "ti,wl1283-st" },775 { .compatible = "ti,wl1285-st" },776 { .compatible = "ti,wl1801-st" },777 { .compatible = "ti,wl1805-st" },778 { .compatible = "ti,wl1807-st" },779 { .compatible = "ti,wl1831-st" },780 { .compatible = "ti,wl1835-st" },781 { .compatible = "ti,wl1837-st" },782 {},783};784MODULE_DEVICE_TABLE(of, hci_ti_of_match);785 786static struct serdev_device_driver hci_ti_drv = {787 .driver = {788 .name = "hci-ti",789 .of_match_table = hci_ti_of_match,790 },791 .probe = hci_ti_probe,792 .remove = hci_ti_remove,793};794#else795#define ll_setup NULL796#endif797 798static const struct hci_uart_proto llp = {799 .id = HCI_UART_LL,800 .name = "LL",801 .setup = ll_setup,802 .open = ll_open,803 .close = ll_close,804 .recv = ll_recv,805 .enqueue = ll_enqueue,806 .dequeue = ll_dequeue,807 .flush = ll_flush,808};809 810int __init ll_init(void)811{812 serdev_device_driver_register(&hci_ti_drv);813 814 return hci_uart_register_proto(&llp);815}816 817int __exit ll_deinit(void)818{819 serdev_device_driver_unregister(&hci_ti_drv);820 821 return hci_uart_unregister_proto(&llp);822}823