v4.19.13 snapshot.
diff --git a/drivers/bluetooth/hci_ll.c b/drivers/bluetooth/hci_ll.c
new file mode 100644
index 0000000..3e767f2
--- /dev/null
+++ b/drivers/bluetooth/hci_ll.c
@@ -0,0 +1,812 @@
+/*
+ * 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 <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");
+ /* fall through */
+ 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 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;
+}
+
+/**
+ * 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 == 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");
+ break;
+ }
+ 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");
+ 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");
+ 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);
+ 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 = 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);
+}