diff options
Diffstat (limited to 'drivers/bluetooth/hci_ll.c')
| -rw-r--r-- | drivers/bluetooth/hci_ll.c | 822 |
1 files changed, 822 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_ll.c b/drivers/bluetooth/hci_ll.c new file mode 100644 index 0000000000..4a0b5c3160 --- /dev/null +++ b/drivers/bluetooth/hci_ll.c @@ -0,0 +1,822 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * 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. + */ + +#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 <linux/nvmem-consumer.h> + +#include "hci_uart.h" + +/* Vendor-specific HCI commands */ +#define HCI_VS_WRITE_BD_ADDR 0xfc06 +#define HCI_VS_UPDATE_UART_HCI_BAUDRATE 0xff36 + +/* 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 states */ +enum hcill_states_e { + HCILL_ASLEEP, + HCILL_ASLEEP_TO_AWAKE, + HCILL_AWAKE, + HCILL_AWAKE_TO_ASLEEP +}; + +struct ll_device { + struct hci_uart hu; + struct serdev_device *serdev; + struct gpio_desc *enable_gpio; + struct clk *ext_clk; + bdaddr_t bdaddr; +}; + +struct ll_struct { + 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; + + 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 */ + skb_put_u8(skb, 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); + + 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); + } + + 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"); + fallthrough; + 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); + dev_kfree_skb_irq(skb); + break; + } + + spin_unlock_irqrestore(&ll->hcill_lock, flags); + + return 0; +} + +static int ll_recv_frame(struct hci_dev *hdev, struct sk_buff *skb) +{ + struct hci_uart *hu = hci_get_drvdata(hdev); + struct ll_struct *ll = hu->priv; + + switch (hci_skb_pkt_type(skb)) { + case HCILL_GO_TO_SLEEP_IND: + BT_DBG("HCILL_GO_TO_SLEEP_IND packet"); + ll_device_want_to_sleep(hu); + break; + case HCILL_GO_TO_SLEEP_ACK: + /* shouldn't happen */ + bt_dev_err(hdev, "received HCILL_GO_TO_SLEEP_ACK in state %ld", + ll->hcill_state); + break; + case HCILL_WAKE_UP_IND: + BT_DBG("HCILL_WAKE_UP_IND packet"); + ll_device_want_to_wakeup(hu); + break; + case HCILL_WAKE_UP_ACK: + BT_DBG("HCILL_WAKE_UP_ACK packet"); + ll_device_woke_up(hu); + break; + } + + kfree_skb(skb); + return 0; +} + +#define LL_RECV_SLEEP_IND \ + .type = HCILL_GO_TO_SLEEP_IND, \ + .hlen = 0, \ + .loff = 0, \ + .lsize = 0, \ + .maxlen = 0 + +#define LL_RECV_SLEEP_ACK \ + .type = HCILL_GO_TO_SLEEP_ACK, \ + .hlen = 0, \ + .loff = 0, \ + .lsize = 0, \ + .maxlen = 0 + +#define LL_RECV_WAKE_IND \ + .type = HCILL_WAKE_UP_IND, \ + .hlen = 0, \ + .loff = 0, \ + .lsize = 0, \ + .maxlen = 0 + +#define LL_RECV_WAKE_ACK \ + .type = HCILL_WAKE_UP_ACK, \ + .hlen = 0, \ + .loff = 0, \ + .lsize = 0, \ + .maxlen = 0 + +static const struct h4_recv_pkt ll_recv_pkts[] = { + { H4_RECV_ACL, .recv = hci_recv_frame }, + { H4_RECV_SCO, .recv = hci_recv_frame }, + { H4_RECV_EVENT, .recv = hci_recv_frame }, + { LL_RECV_SLEEP_IND, .recv = ll_recv_frame }, + { LL_RECV_SLEEP_ACK, .recv = ll_recv_frame }, + { LL_RECV_WAKE_IND, .recv = ll_recv_frame }, + { LL_RECV_WAKE_ACK, .recv = ll_recv_frame }, +}; + +/* Recv data */ +static int ll_recv(struct hci_uart *hu, const void *data, int count) +{ + struct ll_struct *ll = hu->priv; + + if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) + return -EUNATCH; + + ll->rx_skb = h4_recv_buf(hu->hdev, ll->rx_skb, data, count, + ll_recv_pkts, ARRAY_SIZE(ll_recv_pkts)); + if (IS_ERR(ll->rx_skb)) { + int err = PTR_ERR(ll->rx_skb); + bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); + ll->rx_skb = NULL; + return err; + } + + 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; +} + +static int send_command_from_firmware(struct ll_device *lldev, + struct hci_command *cmd) +{ + struct sk_buff *skb; + + if (cmd->opcode == HCI_VS_UPDATE_UART_HCI_BAUDRATE) { + /* ignore remote change + * baud rate HCI VS command + */ + bt_dev_warn(lldev->hu.hdev, + "change remote baud rate command in firmware"); + return 0; + } + if (cmd->prefix != 1) + bt_dev_dbg(lldev->hu.hdev, "command type %d", 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"); + return PTR_ERR(skb); + } + kfree_skb(skb); + return 0; +} + +/* + * 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 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; + err = send_command_from_firmware(lldev, cmd); + if (err) + goto out_rel_fw; + 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"); + msleep(((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_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) +{ + bdaddr_t bdaddr_swapped; + struct sk_buff *skb; + + /* HCI_VS_WRITE_BD_ADDR (at least on a CC2560A chip) expects the BD + * address to be MSB first, but bdaddr_t has the convention of being + * LSB first. + */ + baswap(&bdaddr_swapped, bdaddr); + skb = __hci_cmd_sync(hdev, HCI_VS_WRITE_BD_ADDR, sizeof(bdaddr_t), + &bdaddr_swapped, HCI_INIT_TIMEOUT); + if (!IS_ERR(skb)) + kfree_skb(skb); + + return PTR_ERR_OR_ZERO(skb); +} + +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); + + hu->hdev->set_bdaddr = ll_set_bdaddr; + + serdev_device_set_flow_control(serdev, true); + + do { + /* Reset the Bluetooth device */ + gpiod_set_value_cansleep(lldev->enable_gpio, 0); + msleep(5); + gpiod_set_value_cansleep(lldev->enable_gpio, 1); + mdelay(100); + err = serdev_device_wait_for_cts(serdev, true, 200); + if (err) { + bt_dev_err(hu->hdev, "Failed to get CTS"); + return err; + } + + 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; + + /* Set BD address if one was specified at probe */ + if (!bacmp(&lldev->bdaddr, BDADDR_NONE)) { + /* This means that there was an error getting the BD address + * during probe, so mark the device as having a bad address. + */ + set_bit(HCI_QUIRK_INVALID_BDADDR, &hu->hdev->quirks); + } else if (bacmp(&lldev->bdaddr, BDADDR_ANY)) { + err = ll_set_bdaddr(hu->hdev, &lldev->bdaddr); + if (err) + set_bit(HCI_QUIRK_INVALID_BDADDR, &hu->hdev->quirks); + } + + /* 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) { + __le32 speed_le = cpu_to_le32(speed); + struct sk_buff *skb; + + skb = __hci_cmd_sync(hu->hdev, HCI_VS_UPDATE_UART_HCI_BAUDRATE, + sizeof(speed_le), &speed_le, + 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; + struct nvmem_cell *bdaddr_cell; + 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); + + /* optional BD address from nvram */ + bdaddr_cell = nvmem_cell_get(&serdev->dev, "bd-address"); + if (IS_ERR(bdaddr_cell)) { + int err = PTR_ERR(bdaddr_cell); + + if (err == -EPROBE_DEFER) + return err; + + /* ENOENT means there is no matching nvmem cell and ENOSYS + * means that nvmem is not enabled in the kernel configuration. + */ + if (err != -ENOENT && err != -ENOSYS) { + /* If there was some other error, give userspace a + * chance to fix the problem instead of failing to load + * the driver. Using BDADDR_NONE as a flag that is + * tested later in the setup function. + */ + dev_warn(&serdev->dev, + "Failed to get \"bd-address\" nvmem cell (%d)\n", + err); + bacpy(&lldev->bdaddr, BDADDR_NONE); + } + } else { + bdaddr_t *bdaddr; + size_t len; + + bdaddr = nvmem_cell_read(bdaddr_cell, &len); + nvmem_cell_put(bdaddr_cell); + if (IS_ERR(bdaddr)) { + dev_err(&serdev->dev, "Failed to read nvmem bd-address\n"); + return PTR_ERR(bdaddr); + } + if (len != sizeof(bdaddr_t)) { + dev_err(&serdev->dev, "Invalid nvmem bd-address length\n"); + kfree(bdaddr); + return -EINVAL; + } + + /* As per the device tree bindings, the value from nvmem is + * expected to be MSB first, but in the kernel it is expected + * that bdaddr_t is LSB first. + */ + baswap(&lldev->bdaddr, bdaddr); + kfree(bdaddr); + } + + 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,cc2560" }, + { .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 = 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); +} |