diff options
author | Dominik Sliwa <dominik.sliwa@toradex.com> | 2017-11-21 12:59:41 +0000 |
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committer | Dominik Sliwa <dominik.sliwa@toradex.com> | 2017-12-22 09:40:23 +0000 |
commit | e34cb44ac7c08783b98a16eec70125e205e6eb12 (patch) | |
tree | 1101d23f1a73e5627ae187b07c7a0cf8826e10d1 /drivers/bluetooth/hci_ll.c |
initial commit
Generated againts 4.14 kernel source with
git backports 1d8cc151d365582b42be00af776270b834a7a37d
Diffstat (limited to 'drivers/bluetooth/hci_ll.c')
-rw-r--r-- | drivers/bluetooth/hci_ll.c | 802 |
1 files changed, 802 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_ll.c b/drivers/bluetooth/hci_ll.c new file mode 100644 index 0000000..424c15a --- /dev/null +++ b/drivers/bluetooth/hci_ll.c @@ -0,0 +1,802 @@ +/* + * Texas Instruments' Bluetooth HCILL UART protocol + * + * HCILL (HCI Low Level) is a Texas Instruments' power management + * protocol extension to H4. + * + * Copyright (C) 2007 Texas Instruments, Inc. + * + * Written by Ohad Ben-Cohen <ohad@bencohen.org> + * + * Acknowledgements: + * This file is based on hci_h4.c, which was written + * by Maxim Krasnyansky and Marcel Holtmann. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> + +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/fcntl.h> +#include <linux/firmware.h> +#include <linux/interrupt.h> +#include <linux/ptrace.h> +#include <linux/poll.h> + +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/signal.h> +#include <linux/ioctl.h> +#include <linux/of.h> +#include <linux/serdev.h> +#include <linux/skbuff.h> +#include <linux/ti_wilink_st.h> +#include <linux/clk.h> + +#include <net/bluetooth/bluetooth.h> +#include <net/bluetooth/hci_core.h> +#include <linux/gpio/consumer.h> + +#include "hci_uart.h" + +/* HCILL commands */ +#define HCILL_GO_TO_SLEEP_IND 0x30 +#define HCILL_GO_TO_SLEEP_ACK 0x31 +#define HCILL_WAKE_UP_IND 0x32 +#define HCILL_WAKE_UP_ACK 0x33 + +/* HCILL receiver States */ +#define HCILL_W4_PACKET_TYPE 0 +#define HCILL_W4_EVENT_HDR 1 +#define HCILL_W4_ACL_HDR 2 +#define HCILL_W4_SCO_HDR 3 +#define HCILL_W4_DATA 4 + +/* HCILL states */ +enum hcill_states_e { + HCILL_ASLEEP, + HCILL_ASLEEP_TO_AWAKE, + HCILL_AWAKE, + HCILL_AWAKE_TO_ASLEEP +}; + +struct hcill_cmd { + u8 cmd; +} __packed; + +struct ll_device { + struct hci_uart hu; + struct serdev_device *serdev; + struct gpio_desc *enable_gpio; + struct clk *ext_clk; +}; + +struct ll_struct { + unsigned long rx_state; + unsigned long rx_count; + struct sk_buff *rx_skb; + struct sk_buff_head txq; + spinlock_t hcill_lock; /* HCILL state lock */ + unsigned long hcill_state; /* HCILL power state */ + struct sk_buff_head tx_wait_q; /* HCILL wait queue */ +}; + +/* + * Builds and sends an HCILL command packet. + * These are very simple packets with only 1 cmd byte + */ +static int send_hcill_cmd(u8 cmd, struct hci_uart *hu) +{ + int err = 0; + struct sk_buff *skb = NULL; + struct ll_struct *ll = hu->priv; + struct hcill_cmd *hcill_packet; + + BT_DBG("hu %p cmd 0x%x", hu, cmd); + + /* allocate packet */ + skb = bt_skb_alloc(1, GFP_ATOMIC); + if (!skb) { + BT_ERR("cannot allocate memory for HCILL packet"); + err = -ENOMEM; + goto out; + } + + /* prepare packet */ + hcill_packet = skb_put(skb, 1); + hcill_packet->cmd = cmd; + + /* send packet */ + skb_queue_tail(&ll->txq, skb); +out: + return err; +} + +/* Initialize protocol */ +static int ll_open(struct hci_uart *hu) +{ + struct ll_struct *ll; + + BT_DBG("hu %p", hu); + + ll = kzalloc(sizeof(*ll), GFP_KERNEL); + if (!ll) + return -ENOMEM; + + skb_queue_head_init(&ll->txq); + skb_queue_head_init(&ll->tx_wait_q); + spin_lock_init(&ll->hcill_lock); + + ll->hcill_state = HCILL_AWAKE; + + hu->priv = ll; + + if (hu->serdev) { + struct ll_device *lldev = serdev_device_get_drvdata(hu->serdev); + serdev_device_open(hu->serdev); + if (!IS_ERR(lldev->ext_clk)) + clk_prepare_enable(lldev->ext_clk); + } + + return 0; +} + +/* Flush protocol data */ +static int ll_flush(struct hci_uart *hu) +{ + struct ll_struct *ll = hu->priv; + + BT_DBG("hu %p", hu); + + skb_queue_purge(&ll->tx_wait_q); + skb_queue_purge(&ll->txq); + + return 0; +} + +/* Close protocol */ +static int ll_close(struct hci_uart *hu) +{ + struct ll_struct *ll = hu->priv; + + BT_DBG("hu %p", hu); + + skb_queue_purge(&ll->tx_wait_q); + skb_queue_purge(&ll->txq); + + kfree_skb(ll->rx_skb); + + if (hu->serdev) { + struct ll_device *lldev = serdev_device_get_drvdata(hu->serdev); + gpiod_set_value_cansleep(lldev->enable_gpio, 0); + + clk_disable_unprepare(lldev->ext_clk); + + serdev_device_close(hu->serdev); + } + + hu->priv = NULL; + + kfree(ll); + + return 0; +} + +/* + * internal function, which does common work of the device wake up process: + * 1. places all pending packets (waiting in tx_wait_q list) in txq list. + * 2. changes internal state to HCILL_AWAKE. + * Note: assumes that hcill_lock spinlock is taken, + * shouldn't be called otherwise! + */ +static void __ll_do_awake(struct ll_struct *ll) +{ + struct sk_buff *skb = NULL; + + while ((skb = skb_dequeue(&ll->tx_wait_q))) + skb_queue_tail(&ll->txq, skb); + + ll->hcill_state = HCILL_AWAKE; +} + +/* + * Called upon a wake-up-indication from the device + */ +static void ll_device_want_to_wakeup(struct hci_uart *hu) +{ + unsigned long flags; + struct ll_struct *ll = hu->priv; + + BT_DBG("hu %p", hu); + + /* lock hcill state */ + spin_lock_irqsave(&ll->hcill_lock, flags); + + switch (ll->hcill_state) { + case HCILL_ASLEEP_TO_AWAKE: + /* + * This state means that both the host and the BRF chip + * have simultaneously sent a wake-up-indication packet. + * Traditionally, in this case, receiving a wake-up-indication + * was enough and an additional wake-up-ack wasn't needed. + * This has changed with the BRF6350, which does require an + * explicit wake-up-ack. Other BRF versions, which do not + * require an explicit ack here, do accept it, thus it is + * perfectly safe to always send one. + */ + BT_DBG("dual wake-up-indication"); + /* deliberate fall-through - do not add break */ + case HCILL_ASLEEP: + /* acknowledge device wake up */ + if (send_hcill_cmd(HCILL_WAKE_UP_ACK, hu) < 0) { + BT_ERR("cannot acknowledge device wake up"); + goto out; + } + break; + default: + /* any other state is illegal */ + BT_ERR("received HCILL_WAKE_UP_IND in state %ld", ll->hcill_state); + break; + } + + /* send pending packets and change state to HCILL_AWAKE */ + __ll_do_awake(ll); + +out: + spin_unlock_irqrestore(&ll->hcill_lock, flags); + + /* actually send the packets */ + hci_uart_tx_wakeup(hu); +} + +/* + * Called upon a sleep-indication from the device + */ +static void ll_device_want_to_sleep(struct hci_uart *hu) +{ + unsigned long flags; + struct ll_struct *ll = hu->priv; + + BT_DBG("hu %p", hu); + + /* lock hcill state */ + spin_lock_irqsave(&ll->hcill_lock, flags); + + /* sanity check */ + if (ll->hcill_state != HCILL_AWAKE) + BT_ERR("ERR: HCILL_GO_TO_SLEEP_IND in state %ld", ll->hcill_state); + + /* acknowledge device sleep */ + if (send_hcill_cmd(HCILL_GO_TO_SLEEP_ACK, hu) < 0) { + BT_ERR("cannot acknowledge device sleep"); + goto out; + } + + /* update state */ + ll->hcill_state = HCILL_ASLEEP; + +out: + spin_unlock_irqrestore(&ll->hcill_lock, flags); + + /* actually send the sleep ack packet */ + hci_uart_tx_wakeup(hu); +} + +/* + * Called upon wake-up-acknowledgement from the device + */ +static void ll_device_woke_up(struct hci_uart *hu) +{ + unsigned long flags; + struct ll_struct *ll = hu->priv; + + BT_DBG("hu %p", hu); + + /* lock hcill state */ + spin_lock_irqsave(&ll->hcill_lock, flags); + + /* sanity check */ + if (ll->hcill_state != HCILL_ASLEEP_TO_AWAKE) + BT_ERR("received HCILL_WAKE_UP_ACK in state %ld", ll->hcill_state); + + /* send pending packets and change state to HCILL_AWAKE */ + __ll_do_awake(ll); + + spin_unlock_irqrestore(&ll->hcill_lock, flags); + + /* actually send the packets */ + hci_uart_tx_wakeup(hu); +} + +/* Enqueue frame for transmittion (padding, crc, etc) */ +/* may be called from two simultaneous tasklets */ +static int ll_enqueue(struct hci_uart *hu, struct sk_buff *skb) +{ + unsigned long flags = 0; + struct ll_struct *ll = hu->priv; + + BT_DBG("hu %p skb %p", hu, skb); + + /* Prepend skb with frame type */ + memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); + + /* lock hcill state */ + spin_lock_irqsave(&ll->hcill_lock, flags); + + /* act according to current state */ + switch (ll->hcill_state) { + case HCILL_AWAKE: + BT_DBG("device awake, sending normally"); + skb_queue_tail(&ll->txq, skb); + break; + case HCILL_ASLEEP: + BT_DBG("device asleep, waking up and queueing packet"); + /* save packet for later */ + skb_queue_tail(&ll->tx_wait_q, skb); + /* awake device */ + if (send_hcill_cmd(HCILL_WAKE_UP_IND, hu) < 0) { + BT_ERR("cannot wake up device"); + break; + } + ll->hcill_state = HCILL_ASLEEP_TO_AWAKE; + break; + case HCILL_ASLEEP_TO_AWAKE: + BT_DBG("device waking up, queueing packet"); + /* transient state; just keep packet for later */ + skb_queue_tail(&ll->tx_wait_q, skb); + break; + default: + BT_ERR("illegal hcill state: %ld (losing packet)", ll->hcill_state); + kfree_skb(skb); + break; + } + + spin_unlock_irqrestore(&ll->hcill_lock, flags); + + return 0; +} + +static inline int ll_check_data_len(struct hci_dev *hdev, struct ll_struct *ll, int len) +{ + int room = skb_tailroom(ll->rx_skb); + + BT_DBG("len %d room %d", len, room); + + if (!len) { + hci_recv_frame(hdev, ll->rx_skb); + } else if (len > room) { + BT_ERR("Data length is too large"); + kfree_skb(ll->rx_skb); + } else { + ll->rx_state = HCILL_W4_DATA; + ll->rx_count = len; + return len; + } + + ll->rx_state = HCILL_W4_PACKET_TYPE; + ll->rx_skb = NULL; + ll->rx_count = 0; + + return 0; +} + +/* Recv data */ +static int ll_recv(struct hci_uart *hu, const void *data, int count) +{ + struct ll_struct *ll = hu->priv; + const char *ptr; + struct hci_event_hdr *eh; + struct hci_acl_hdr *ah; + struct hci_sco_hdr *sh; + int len, type, dlen; + + BT_DBG("hu %p count %d rx_state %ld rx_count %ld", hu, count, ll->rx_state, ll->rx_count); + + ptr = data; + while (count) { + if (ll->rx_count) { + len = min_t(unsigned int, ll->rx_count, count); + skb_put_data(ll->rx_skb, ptr, len); + ll->rx_count -= len; count -= len; ptr += len; + + if (ll->rx_count) + continue; + + switch (ll->rx_state) { + case HCILL_W4_DATA: + BT_DBG("Complete data"); + hci_recv_frame(hu->hdev, ll->rx_skb); + + ll->rx_state = HCILL_W4_PACKET_TYPE; + ll->rx_skb = NULL; + continue; + + case HCILL_W4_EVENT_HDR: + eh = hci_event_hdr(ll->rx_skb); + + BT_DBG("Event header: evt 0x%2.2x plen %d", eh->evt, eh->plen); + + ll_check_data_len(hu->hdev, ll, eh->plen); + continue; + + case HCILL_W4_ACL_HDR: + ah = hci_acl_hdr(ll->rx_skb); + dlen = __le16_to_cpu(ah->dlen); + + BT_DBG("ACL header: dlen %d", dlen); + + ll_check_data_len(hu->hdev, ll, dlen); + continue; + + case HCILL_W4_SCO_HDR: + sh = hci_sco_hdr(ll->rx_skb); + + BT_DBG("SCO header: dlen %d", sh->dlen); + + ll_check_data_len(hu->hdev, ll, sh->dlen); + continue; + } + } + + /* HCILL_W4_PACKET_TYPE */ + switch (*ptr) { + case HCI_EVENT_PKT: + BT_DBG("Event packet"); + ll->rx_state = HCILL_W4_EVENT_HDR; + ll->rx_count = HCI_EVENT_HDR_SIZE; + type = HCI_EVENT_PKT; + break; + + case HCI_ACLDATA_PKT: + BT_DBG("ACL packet"); + ll->rx_state = HCILL_W4_ACL_HDR; + ll->rx_count = HCI_ACL_HDR_SIZE; + type = HCI_ACLDATA_PKT; + break; + + case HCI_SCODATA_PKT: + BT_DBG("SCO packet"); + ll->rx_state = HCILL_W4_SCO_HDR; + ll->rx_count = HCI_SCO_HDR_SIZE; + type = HCI_SCODATA_PKT; + break; + + /* HCILL signals */ + case HCILL_GO_TO_SLEEP_IND: + BT_DBG("HCILL_GO_TO_SLEEP_IND packet"); + ll_device_want_to_sleep(hu); + ptr++; count--; + continue; + + case HCILL_GO_TO_SLEEP_ACK: + /* shouldn't happen */ + BT_ERR("received HCILL_GO_TO_SLEEP_ACK (in state %ld)", ll->hcill_state); + ptr++; count--; + continue; + + case HCILL_WAKE_UP_IND: + BT_DBG("HCILL_WAKE_UP_IND packet"); + ll_device_want_to_wakeup(hu); + ptr++; count--; + continue; + + case HCILL_WAKE_UP_ACK: + BT_DBG("HCILL_WAKE_UP_ACK packet"); + ll_device_woke_up(hu); + ptr++; count--; + continue; + + default: + BT_ERR("Unknown HCI packet type %2.2x", (__u8)*ptr); + hu->hdev->stat.err_rx++; + ptr++; count--; + continue; + } + + ptr++; count--; + + /* Allocate packet */ + ll->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC); + if (!ll->rx_skb) { + BT_ERR("Can't allocate mem for new packet"); + ll->rx_state = HCILL_W4_PACKET_TYPE; + ll->rx_count = 0; + return -ENOMEM; + } + + hci_skb_pkt_type(ll->rx_skb) = type; + } + + return count; +} + +static struct sk_buff *ll_dequeue(struct hci_uart *hu) +{ + struct ll_struct *ll = hu->priv; + return skb_dequeue(&ll->txq); +} + +#if IS_ENABLED(CONFIG_SERIAL_DEV_BUS) +static int read_local_version(struct hci_dev *hdev) +{ + int err = 0; + unsigned short version = 0; + struct sk_buff *skb; + struct hci_rp_read_local_version *ver; + + skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + bt_dev_err(hdev, "Reading TI version information failed (%ld)", + PTR_ERR(skb)); + return PTR_ERR(skb); + } + if (skb->len != sizeof(*ver)) { + err = -EILSEQ; + goto out; + } + + ver = (struct hci_rp_read_local_version *)skb->data; + if (le16_to_cpu(ver->manufacturer) != 13) { + err = -ENODEV; + goto out; + } + + version = le16_to_cpu(ver->lmp_subver); + +out: + if (err) bt_dev_err(hdev, "Failed to read TI version info: %d", err); + kfree_skb(skb); + return err ? err : version; +} + +/** + * download_firmware - + * internal function which parses through the .bts firmware + * script file intreprets SEND, DELAY actions only as of now + */ +static int download_firmware(struct ll_device *lldev) +{ + unsigned short chip, min_ver, maj_ver; + int version, err, len; + unsigned char *ptr, *action_ptr; + unsigned char bts_scr_name[40]; /* 40 char long bts scr name? */ + const struct firmware *fw; + struct sk_buff *skb; + struct hci_command *cmd; + + version = read_local_version(lldev->hu.hdev); + if (version < 0) + return version; + + chip = (version & 0x7C00) >> 10; + min_ver = (version & 0x007F); + maj_ver = (version & 0x0380) >> 7; + if (version & 0x8000) + maj_ver |= 0x0008; + + snprintf(bts_scr_name, sizeof(bts_scr_name), + "ti-connectivity/TIInit_%d.%d.%d.bts", + chip, maj_ver, min_ver); + + err = request_firmware(&fw, bts_scr_name, &lldev->serdev->dev); + if (err || !fw->data || !fw->size) { + bt_dev_err(lldev->hu.hdev, "request_firmware failed(errno %d) for %s", + err, bts_scr_name); + return -EINVAL; + } + ptr = (void *)fw->data; + len = fw->size; + /* bts_header to remove out magic number and + * version + */ + ptr += sizeof(struct bts_header); + len -= sizeof(struct bts_header); + + while (len > 0 && ptr) { + bt_dev_dbg(lldev->hu.hdev, " action size %d, type %d ", + ((struct bts_action *)ptr)->size, + ((struct bts_action *)ptr)->type); + + action_ptr = &(((struct bts_action *)ptr)->data[0]); + + switch (((struct bts_action *)ptr)->type) { + case ACTION_SEND_COMMAND: /* action send */ + bt_dev_dbg(lldev->hu.hdev, "S"); + cmd = (struct hci_command *)action_ptr; + if (cmd->opcode == 0xff36) { + /* ignore remote change + * baud rate HCI VS command + */ + bt_dev_warn(lldev->hu.hdev, "change remote baud rate command in firmware"); + break; + } + if (cmd->prefix != 1) + bt_dev_dbg(lldev->hu.hdev, "command type %d\n", cmd->prefix); + + skb = __hci_cmd_sync(lldev->hu.hdev, cmd->opcode, cmd->plen, &cmd->speed, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + bt_dev_err(lldev->hu.hdev, "send command failed\n"); + err = PTR_ERR(skb); + goto out_rel_fw; + } + kfree_skb(skb); + break; + case ACTION_WAIT_EVENT: /* wait */ + /* no need to wait as command was synchronous */ + bt_dev_dbg(lldev->hu.hdev, "W"); + break; + case ACTION_DELAY: /* sleep */ + bt_dev_info(lldev->hu.hdev, "sleep command in scr"); + mdelay(((struct bts_action_delay *)action_ptr)->msec); + break; + } + len -= (sizeof(struct bts_action) + + ((struct bts_action *)ptr)->size); + ptr += sizeof(struct bts_action) + + ((struct bts_action *)ptr)->size; + } + +out_rel_fw: + /* fw download complete */ + release_firmware(fw); + return err; +} + +static int ll_setup(struct hci_uart *hu) +{ + int err, retry = 3; + struct ll_device *lldev; + struct serdev_device *serdev = hu->serdev; + u32 speed; + + if (!serdev) + return 0; + + lldev = serdev_device_get_drvdata(serdev); + + serdev_device_set_flow_control(serdev, true); + + do { + /* Configure BT_EN to HIGH state */ + gpiod_set_value_cansleep(lldev->enable_gpio, 0); + msleep(5); + gpiod_set_value_cansleep(lldev->enable_gpio, 1); + msleep(100); + + err = download_firmware(lldev); + if (!err) + break; + + /* Toggle BT_EN and retry */ + bt_dev_err(hu->hdev, "download firmware failed, retrying..."); + } while (retry--); + + if (err) + return err; + + /* Operational speed if any */ + if (hu->oper_speed) + speed = hu->oper_speed; + else if (hu->proto->oper_speed) + speed = hu->proto->oper_speed; + else + speed = 0; + + if (speed) { + struct sk_buff *skb = __hci_cmd_sync(hu->hdev, 0xff36, sizeof(speed), &speed, HCI_INIT_TIMEOUT); + if (!IS_ERR(skb)) { + kfree_skb(skb); + serdev_device_set_baudrate(serdev, speed); + } + } + + return 0; +} + +static const struct hci_uart_proto llp; + +static int hci_ti_probe(struct serdev_device *serdev) +{ + struct hci_uart *hu; + struct ll_device *lldev; + u32 max_speed = 3000000; + + lldev = devm_kzalloc(&serdev->dev, sizeof(struct ll_device), GFP_KERNEL); + if (!lldev) + return -ENOMEM; + hu = &lldev->hu; + + serdev_device_set_drvdata(serdev, lldev); + lldev->serdev = hu->serdev = serdev; + + lldev->enable_gpio = devm_gpiod_get_optional(&serdev->dev, "enable", GPIOD_OUT_LOW); + if (IS_ERR(lldev->enable_gpio)) + return PTR_ERR(lldev->enable_gpio); + + lldev->ext_clk = devm_clk_get(&serdev->dev, "ext_clock"); + if (IS_ERR(lldev->ext_clk) && PTR_ERR(lldev->ext_clk) != -ENOENT) + return PTR_ERR(lldev->ext_clk); + + of_property_read_u32(serdev->dev.of_node, "max-speed", &max_speed); + hci_uart_set_speeds(hu, 115200, max_speed); + + return hci_uart_register_device(hu, &llp); +} + +static void hci_ti_remove(struct serdev_device *serdev) +{ + struct ll_device *lldev = serdev_device_get_drvdata(serdev); + + hci_uart_unregister_device(&lldev->hu); +} + +static const struct of_device_id hci_ti_of_match[] = { + { .compatible = "ti,wl1271-st" }, + { .compatible = "ti,wl1273-st" }, + { .compatible = "ti,wl1281-st" }, + { .compatible = "ti,wl1283-st" }, + { .compatible = "ti,wl1285-st" }, + { .compatible = "ti,wl1801-st" }, + { .compatible = "ti,wl1805-st" }, + { .compatible = "ti,wl1807-st" }, + { .compatible = "ti,wl1831-st" }, + { .compatible = "ti,wl1835-st" }, + { .compatible = "ti,wl1837-st" }, + {}, +}; +MODULE_DEVICE_TABLE(of, hci_ti_of_match); + +static struct serdev_device_driver hci_ti_drv = { + .driver = { + .name = "hci-ti", + .of_match_table = of_match_ptr(hci_ti_of_match), + }, + .probe = hci_ti_probe, + .remove = hci_ti_remove, +}; +#else +#define ll_setup NULL +#endif + +static const struct hci_uart_proto llp = { + .id = HCI_UART_LL, + .name = "LL", + .setup = ll_setup, + .open = ll_open, + .close = ll_close, + .recv = ll_recv, + .enqueue = ll_enqueue, + .dequeue = ll_dequeue, + .flush = ll_flush, +}; + +int __init ll_init(void) +{ + serdev_device_driver_register(&hci_ti_drv); + + return hci_uart_register_proto(&llp); +} + +int __exit ll_deinit(void) +{ + serdev_device_driver_unregister(&hci_ti_drv); + + return hci_uart_unregister_proto(&llp); +} |