[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/bluetooth/hci_ll.c b/src/kernel/linux/v4.14/drivers/bluetooth/hci_ll.c
new file mode 100644
index 0000000..424c15a
--- /dev/null
+++ b/src/kernel/linux/v4.14/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);
+}