1 files changed, 793 insertions, 0 deletions

diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c
new file mode 100644
index 0000000000..9658b33c82
--- /dev/null
+++ b/drivers/bluetooth/btmrvl_main.c
@@ -0,0 +1,793 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Marvell Bluetooth driver
+ *
+ * Copyright (C) 2009, Marvell International Ltd.
+ **/
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <linux/mmc/sdio_func.h>
+
+#include "btmrvl_drv.h"
+#include "btmrvl_sdio.h"
+
+#define VERSION "1.0"
+
+/*
+ * This function is called by interface specific interrupt handler.
+ * It updates Power Save & Host Sleep states, and wakes up the main
+ * thread.
+ */
+void btmrvl_interrupt(struct btmrvl_private *priv)
+{
+	priv->adapter->ps_state = PS_AWAKE;
+
+	priv->adapter->wakeup_tries = 0;
+
+	priv->adapter->int_count++;
+
+	if (priv->adapter->hs_state == HS_ACTIVATED) {
+		BT_DBG("BT: HS DEACTIVATED in ISR!");
+		priv->adapter->hs_state = HS_DEACTIVATED;
+	}
+
+	wake_up_interruptible(&priv->main_thread.wait_q);
+}
+EXPORT_SYMBOL_GPL(btmrvl_interrupt);
+
+bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
+{
+	struct hci_event_hdr *hdr = (void *) skb->data;
+
+	if (hdr->evt == HCI_EV_CMD_COMPLETE) {
+		struct hci_ev_cmd_complete *ec;
+		u16 opcode;
+
+		ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
+		opcode = __le16_to_cpu(ec->opcode);
+
+		if (priv->btmrvl_dev.sendcmdflag) {
+			priv->btmrvl_dev.sendcmdflag = false;
+			priv->adapter->cmd_complete = true;
+			wake_up_interruptible(&priv->adapter->cmd_wait_q);
+
+			if (hci_opcode_ogf(opcode) == 0x3F) {
+				BT_DBG("vendor event skipped: opcode=%#4.4x",
+				       opcode);
+				kfree_skb(skb);
+				return false;
+			}
+		}
+	}
+
+	return true;
+}
+EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);
+
+int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb)
+{
+	struct btmrvl_adapter *adapter = priv->adapter;
+	struct btmrvl_event *event;
+	int ret = 0;
+
+	event = (struct btmrvl_event *) skb->data;
+	if (event->ec != 0xff) {
+		BT_DBG("Not Marvell Event=%x", event->ec);
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	switch (event->data[0]) {
+	case BT_EVENT_AUTO_SLEEP_MODE:
+		if (!event->data[2]) {
+			if (event->data[1] == BT_PS_ENABLE)
+				adapter->psmode = 1;
+			else
+				adapter->psmode = 0;
+			BT_DBG("PS Mode:%s",
+				(adapter->psmode) ? "Enable" : "Disable");
+		} else {
+			BT_DBG("PS Mode command failed");
+		}
+		break;
+
+	case BT_EVENT_HOST_SLEEP_CONFIG:
+		if (!event->data[3])
+			BT_DBG("gpio=%x, gap=%x", event->data[1],
+							event->data[2]);
+		else
+			BT_DBG("HSCFG command failed");
+		break;
+
+	case BT_EVENT_HOST_SLEEP_ENABLE:
+		if (!event->data[1]) {
+			adapter->hs_state = HS_ACTIVATED;
+			if (adapter->psmode)
+				adapter->ps_state = PS_SLEEP;
+			wake_up_interruptible(&adapter->event_hs_wait_q);
+			BT_DBG("HS ACTIVATED!");
+		} else {
+			BT_DBG("HS Enable failed");
+		}
+		break;
+
+	case BT_EVENT_MODULE_CFG_REQ:
+		if (priv->btmrvl_dev.sendcmdflag &&
+				event->data[1] == MODULE_BRINGUP_REQ) {
+			BT_DBG("EVENT:%s",
+				((event->data[2] == MODULE_BROUGHT_UP) ||
+				(event->data[2] == MODULE_ALREADY_UP)) ?
+				"Bring-up succeed" : "Bring-up failed");
+
+			if (event->length > 3 && event->data[3])
+				priv->btmrvl_dev.dev_type = HCI_AMP;
+			else
+				priv->btmrvl_dev.dev_type = HCI_PRIMARY;
+
+			BT_DBG("dev_type: %d", priv->btmrvl_dev.dev_type);
+		} else if (priv->btmrvl_dev.sendcmdflag &&
+				event->data[1] == MODULE_SHUTDOWN_REQ) {
+			BT_DBG("EVENT:%s", (event->data[2]) ?
+				"Shutdown failed" : "Shutdown succeed");
+		} else {
+			BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
+			ret = -EINVAL;
+		}
+		break;
+
+	case BT_EVENT_POWER_STATE:
+		if (event->data[1] == BT_PS_SLEEP)
+			adapter->ps_state = PS_SLEEP;
+		BT_DBG("EVENT:%s",
+			(adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
+		break;
+
+	default:
+		BT_DBG("Unknown Event=%d", event->data[0]);
+		ret = -EINVAL;
+		break;
+	}
+
+exit:
+	if (!ret)
+		kfree_skb(skb);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(btmrvl_process_event);
+
+static int btmrvl_send_sync_cmd(struct btmrvl_private *priv, u16 opcode,
+				const void *param, u8 len)
+{
+	struct sk_buff *skb;
+	struct hci_command_hdr *hdr;
+
+	if (priv->surprise_removed) {
+		BT_ERR("Card is removed");
+		return -EFAULT;
+	}
+
+	skb = bt_skb_alloc(HCI_COMMAND_HDR_SIZE + len, GFP_KERNEL);
+	if (!skb) {
+		BT_ERR("No free skb");
+		return -ENOMEM;
+	}
+
+	hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
+	hdr->opcode = cpu_to_le16(opcode);
+	hdr->plen = len;
+
+	if (len)
+		skb_put_data(skb, param, len);
+
+	hci_skb_pkt_type(skb) = MRVL_VENDOR_PKT;
+
+	skb_queue_head(&priv->adapter->tx_queue, skb);
+
+	priv->btmrvl_dev.sendcmdflag = true;
+
+	priv->adapter->cmd_complete = false;
+
+	wake_up_interruptible(&priv->main_thread.wait_q);
+
+	if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
+					      priv->adapter->cmd_complete ||
+					      priv->surprise_removed,
+					      WAIT_UNTIL_CMD_RESP))
+		return -ETIMEDOUT;
+
+	if (priv->surprise_removed)
+		return -EFAULT;
+
+	return 0;
+}
+
+int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, u8 subcmd)
+{
+	int ret;
+
+	ret = btmrvl_send_sync_cmd(priv, BT_CMD_MODULE_CFG_REQ, &subcmd, 1);
+	if (ret)
+		BT_ERR("module_cfg_cmd(%x) failed", subcmd);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
+
+static int btmrvl_enable_sco_routing_to_host(struct btmrvl_private *priv)
+{
+	int ret;
+	u8 subcmd = 0;
+
+	ret = btmrvl_send_sync_cmd(priv, BT_CMD_ROUTE_SCO_TO_HOST, &subcmd, 1);
+	if (ret)
+		BT_ERR("BT_CMD_ROUTE_SCO_TO_HOST command failed: %#x", ret);
+
+	return ret;
+}
+
+int btmrvl_pscan_window_reporting(struct btmrvl_private *priv, u8 subcmd)
+{
+	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
+	int ret;
+
+	if (!card->support_pscan_win_report)
+		return 0;
+
+	ret = btmrvl_send_sync_cmd(priv, BT_CMD_PSCAN_WIN_REPORT_ENABLE,
+				   &subcmd, 1);
+	if (ret)
+		BT_ERR("PSCAN_WIN_REPORT_ENABLE command failed: %#x", ret);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(btmrvl_pscan_window_reporting);
+
+int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv)
+{
+	int ret;
+	u8 param[2];
+
+	param[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
+	param[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
+
+	BT_DBG("Sending HSCFG Command, gpio=0x%x, gap=0x%x",
+	       param[0], param[1]);
+
+	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_CONFIG, param, 2);
+	if (ret)
+		BT_ERR("HSCFG command failed");
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd);
+
+int btmrvl_enable_ps(struct btmrvl_private *priv)
+{
+	int ret;
+	u8 param;
+
+	if (priv->btmrvl_dev.psmode)
+		param = BT_PS_ENABLE;
+	else
+		param = BT_PS_DISABLE;
+
+	ret = btmrvl_send_sync_cmd(priv, BT_CMD_AUTO_SLEEP_MODE, &param, 1);
+	if (ret)
+		BT_ERR("PSMODE command failed");
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btmrvl_enable_ps);
+
+int btmrvl_enable_hs(struct btmrvl_private *priv)
+{
+	struct btmrvl_adapter *adapter = priv->adapter;
+	int ret;
+
+	ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_ENABLE, NULL, 0);
+	if (ret) {
+		BT_ERR("Host sleep enable command failed");
+		return ret;
+	}
+
+	ret = wait_event_interruptible_timeout(adapter->event_hs_wait_q,
+					       adapter->hs_state ||
+					       priv->surprise_removed,
+					       WAIT_UNTIL_HS_STATE_CHANGED);
+	if (ret < 0 || priv->surprise_removed) {
+		BT_ERR("event_hs_wait_q terminated (%d): %d,%d,%d",
+		       ret, adapter->hs_state, adapter->ps_state,
+		       adapter->wakeup_tries);
+	} else if (!ret) {
+		BT_ERR("hs_enable timeout: %d,%d,%d", adapter->hs_state,
+		       adapter->ps_state, adapter->wakeup_tries);
+		ret = -ETIMEDOUT;
+	} else {
+		BT_DBG("host sleep enabled: %d,%d,%d", adapter->hs_state,
+		       adapter->ps_state, adapter->wakeup_tries);
+		ret = 0;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(btmrvl_enable_hs);
+
+int btmrvl_prepare_command(struct btmrvl_private *priv)
+{
+	int ret = 0;
+
+	if (priv->btmrvl_dev.hscfgcmd) {
+		priv->btmrvl_dev.hscfgcmd = 0;
+		btmrvl_send_hscfg_cmd(priv);
+	}
+
+	if (priv->btmrvl_dev.pscmd) {
+		priv->btmrvl_dev.pscmd = 0;
+		btmrvl_enable_ps(priv);
+	}
+
+	if (priv->btmrvl_dev.hscmd) {
+		priv->btmrvl_dev.hscmd = 0;
+
+		if (priv->btmrvl_dev.hsmode) {
+			ret = btmrvl_enable_hs(priv);
+		} else {
+			ret = priv->hw_wakeup_firmware(priv);
+			priv->adapter->hs_state = HS_DEACTIVATED;
+			BT_DBG("BT: HS DEACTIVATED due to host activity!");
+		}
+	}
+
+	return ret;
+}
+
+static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
+{
+	int ret = 0;
+
+	if (!skb || !skb->data)
+		return -EINVAL;
+
+	if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
+		BT_ERR("Tx Error: Bad skb length %d : %d",
+						skb->len, BTM_UPLD_SIZE);
+		return -EINVAL;
+	}
+
+	skb_push(skb, BTM_HEADER_LEN);
+
+	/* header type: byte[3]
+	 * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
+	 * header length: byte[2][1][0]
+	 */
+
+	skb->data[0] = (skb->len & 0x0000ff);
+	skb->data[1] = (skb->len & 0x00ff00) >> 8;
+	skb->data[2] = (skb->len & 0xff0000) >> 16;
+	skb->data[3] = hci_skb_pkt_type(skb);
+
+	if (priv->hw_host_to_card)
+		ret = priv->hw_host_to_card(priv, skb->data, skb->len);
+
+	return ret;
+}
+
+static void btmrvl_init_adapter(struct btmrvl_private *priv)
+{
+	int buf_size;
+
+	skb_queue_head_init(&priv->adapter->tx_queue);
+
+	priv->adapter->ps_state = PS_AWAKE;
+
+	buf_size = ALIGN_SZ(SDIO_BLOCK_SIZE, BTSDIO_DMA_ALIGN);
+	priv->adapter->hw_regs_buf = kzalloc(buf_size, GFP_KERNEL);
+	if (!priv->adapter->hw_regs_buf) {
+		priv->adapter->hw_regs = NULL;
+		BT_ERR("Unable to allocate buffer for hw_regs.");
+	} else {
+		priv->adapter->hw_regs =
+			(u8 *)ALIGN_ADDR(priv->adapter->hw_regs_buf,
+					 BTSDIO_DMA_ALIGN);
+		BT_DBG("hw_regs_buf=%p hw_regs=%p",
+		       priv->adapter->hw_regs_buf, priv->adapter->hw_regs);
+	}
+
+	init_waitqueue_head(&priv->adapter->cmd_wait_q);
+	init_waitqueue_head(&priv->adapter->event_hs_wait_q);
+}
+
+static void btmrvl_free_adapter(struct btmrvl_private *priv)
+{
+	skb_queue_purge(&priv->adapter->tx_queue);
+
+	kfree(priv->adapter->hw_regs_buf);
+	kfree(priv->adapter);
+
+	priv->adapter = NULL;
+}
+
+static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct btmrvl_private *priv = hci_get_drvdata(hdev);
+
+	BT_DBG("type=%d, len=%d", hci_skb_pkt_type(skb), skb->len);
+
+	if (priv->adapter->is_suspending || priv->adapter->is_suspended) {
+		BT_ERR("%s: Device is suspending or suspended", __func__);
+		return -EBUSY;
+	}
+
+	switch (hci_skb_pkt_type(skb)) {
+	case HCI_COMMAND_PKT:
+		hdev->stat.cmd_tx++;
+		break;
+
+	case HCI_ACLDATA_PKT:
+		hdev->stat.acl_tx++;
+		break;
+
+	case HCI_SCODATA_PKT:
+		hdev->stat.sco_tx++;
+		break;
+	}
+
+	skb_queue_tail(&priv->adapter->tx_queue, skb);
+
+	if (!priv->adapter->is_suspended)
+		wake_up_interruptible(&priv->main_thread.wait_q);
+
+	return 0;
+}
+
+static int btmrvl_flush(struct hci_dev *hdev)
+{
+	struct btmrvl_private *priv = hci_get_drvdata(hdev);
+
+	skb_queue_purge(&priv->adapter->tx_queue);
+
+	return 0;
+}
+
+static int btmrvl_close(struct hci_dev *hdev)
+{
+	struct btmrvl_private *priv = hci_get_drvdata(hdev);
+
+	skb_queue_purge(&priv->adapter->tx_queue);
+
+	return 0;
+}
+
+static int btmrvl_open(struct hci_dev *hdev)
+{
+	return 0;
+}
+
+static int btmrvl_download_cal_data(struct btmrvl_private *priv,
+				    u8 *data, int len)
+{
+	int ret;
+
+	data[0] = 0x00;
+	data[1] = 0x00;
+	data[2] = 0x00;
+	data[3] = len;
+
+	print_hex_dump_bytes("Calibration data: ",
+			     DUMP_PREFIX_OFFSET, data, BT_CAL_HDR_LEN + len);
+
+	ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data,
+				   BT_CAL_HDR_LEN + len);
+	if (ret)
+		BT_ERR("Failed to download calibration data");
+
+	return 0;
+}
+
+static int btmrvl_check_device_tree(struct btmrvl_private *priv)
+{
+	struct device_node *dt_node;
+	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
+	u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE];
+	int ret = 0;
+	u16 gpio, gap;
+
+	if (card->plt_of_node) {
+		dt_node = card->plt_of_node;
+		ret = of_property_read_u16(dt_node, "marvell,wakeup-pin",
+					   &gpio);
+		if (ret)
+			gpio = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
+
+		ret = of_property_read_u16(dt_node, "marvell,wakeup-gap-ms",
+					   &gap);
+		if (ret)
+			gap = (u8)(priv->btmrvl_dev.gpio_gap & 0x00ff);
+
+		priv->btmrvl_dev.gpio_gap = (gpio << 8) + gap;
+
+		ret = of_property_read_u8_array(dt_node, "marvell,cal-data",
+						cal_data + BT_CAL_HDR_LEN,
+						BT_CAL_DATA_SIZE);
+		if (ret)
+			return ret;
+
+		BT_DBG("Use cal data from device tree");
+		ret = btmrvl_download_cal_data(priv, cal_data,
+					       BT_CAL_DATA_SIZE);
+		if (ret)
+			BT_ERR("Fail to download calibrate data");
+	}
+
+	return ret;
+}
+
+static int btmrvl_setup(struct hci_dev *hdev)
+{
+	struct btmrvl_private *priv = hci_get_drvdata(hdev);
+	int ret;
+
+	ret = btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
+	if (ret)
+		return ret;
+
+	priv->btmrvl_dev.gpio_gap = 0xfffe;
+
+	btmrvl_check_device_tree(priv);
+
+	btmrvl_enable_sco_routing_to_host(priv);
+
+	btmrvl_pscan_window_reporting(priv, 0x01);
+
+	priv->btmrvl_dev.psmode = 1;
+	btmrvl_enable_ps(priv);
+
+	btmrvl_send_hscfg_cmd(priv);
+
+	return 0;
+}
+
+static int btmrvl_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
+{
+	struct sk_buff *skb;
+	long ret;
+	u8 buf[8];
+
+	buf[0] = MRVL_VENDOR_PKT;
+	buf[1] = sizeof(bdaddr_t);
+	memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
+
+	skb = __hci_cmd_sync(hdev, BT_CMD_SET_BDADDR, sizeof(buf), buf,
+			     HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		ret = PTR_ERR(skb);
+		BT_ERR("%s: changing btmrvl device address failed (%ld)",
+		       hdev->name, ret);
+		return ret;
+	}
+	kfree_skb(skb);
+
+	return 0;
+}
+
+static bool btmrvl_wakeup(struct hci_dev *hdev)
+{
+	struct btmrvl_private *priv = hci_get_drvdata(hdev);
+	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
+
+	return device_may_wakeup(&card->func->dev);
+}
+
+/*
+ * This function handles the event generated by firmware, rx data
+ * received from firmware, and tx data sent from kernel.
+ */
+static int btmrvl_service_main_thread(void *data)
+{
+	struct btmrvl_thread *thread = data;
+	struct btmrvl_private *priv = thread->priv;
+	struct btmrvl_adapter *adapter = priv->adapter;
+	wait_queue_entry_t wait;
+	struct sk_buff *skb;
+	ulong flags;
+
+	init_waitqueue_entry(&wait, current);
+
+	for (;;) {
+		add_wait_queue(&thread->wait_q, &wait);
+
+		set_current_state(TASK_INTERRUPTIBLE);
+		if (kthread_should_stop() || priv->surprise_removed) {
+			BT_DBG("main_thread: break from main thread");
+			break;
+		}
+
+		if (adapter->wakeup_tries ||
+				((!adapter->int_count) &&
+				(!priv->btmrvl_dev.tx_dnld_rdy ||
+				skb_queue_empty(&adapter->tx_queue)))) {
+			BT_DBG("main_thread is sleeping...");
+			schedule();
+		}
+
+		set_current_state(TASK_RUNNING);
+
+		remove_wait_queue(&thread->wait_q, &wait);
+
+		BT_DBG("main_thread woke up");
+
+		if (kthread_should_stop() || priv->surprise_removed) {
+			BT_DBG("main_thread: break from main thread");
+			break;
+		}
+
+		spin_lock_irqsave(&priv->driver_lock, flags);
+		if (adapter->int_count) {
+			adapter->int_count = 0;
+			spin_unlock_irqrestore(&priv->driver_lock, flags);
+			priv->hw_process_int_status(priv);
+		} else if (adapter->ps_state == PS_SLEEP &&
+					!skb_queue_empty(&adapter->tx_queue)) {
+			spin_unlock_irqrestore(&priv->driver_lock, flags);
+			adapter->wakeup_tries++;
+			priv->hw_wakeup_firmware(priv);
+			continue;
+		} else {
+			spin_unlock_irqrestore(&priv->driver_lock, flags);
+		}
+
+		if (adapter->ps_state == PS_SLEEP)
+			continue;
+
+		if (!priv->btmrvl_dev.tx_dnld_rdy ||
+		    priv->adapter->is_suspended)
+			continue;
+
+		skb = skb_dequeue(&adapter->tx_queue);
+		if (skb) {
+			if (btmrvl_tx_pkt(priv, skb))
+				priv->btmrvl_dev.hcidev->stat.err_tx++;
+			else
+				priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
+
+			kfree_skb(skb);
+		}
+	}
+
+	return 0;
+}
+
+int btmrvl_register_hdev(struct btmrvl_private *priv)
+{
+	struct hci_dev *hdev = NULL;
+	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
+	int ret;
+
+	hdev = hci_alloc_dev();
+	if (!hdev) {
+		BT_ERR("Can not allocate HCI device");
+		goto err_hdev;
+	}
+
+	priv->btmrvl_dev.hcidev = hdev;
+	hci_set_drvdata(hdev, priv);
+
+	hdev->bus   = HCI_SDIO;
+	hdev->open  = btmrvl_open;
+	hdev->close = btmrvl_close;
+	hdev->flush = btmrvl_flush;
+	hdev->send  = btmrvl_send_frame;
+	hdev->setup = btmrvl_setup;
+	hdev->set_bdaddr = btmrvl_set_bdaddr;
+	hdev->wakeup = btmrvl_wakeup;
+	SET_HCIDEV_DEV(hdev, &card->func->dev);
+
+	hdev->dev_type = priv->btmrvl_dev.dev_type;
+
+	ret = hci_register_dev(hdev);
+	if (ret < 0) {
+		BT_ERR("Can not register HCI device");
+		goto err_hci_register_dev;
+	}
+
+#ifdef CONFIG_DEBUG_FS
+	btmrvl_debugfs_init(hdev);
+#endif
+
+	return 0;
+
+err_hci_register_dev:
+	hci_free_dev(hdev);
+
+err_hdev:
+	/* Stop the thread servicing the interrupts */
+	kthread_stop(priv->main_thread.task);
+
+	btmrvl_free_adapter(priv);
+	kfree(priv);
+
+	return -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
+
+struct btmrvl_private *btmrvl_add_card(void *card)
+{
+	struct btmrvl_private *priv;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv) {
+		BT_ERR("Can not allocate priv");
+		goto err_priv;
+	}
+
+	priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
+	if (!priv->adapter) {
+		BT_ERR("Allocate buffer for btmrvl_adapter failed!");
+		goto err_adapter;
+	}
+
+	btmrvl_init_adapter(priv);
+
+	BT_DBG("Starting kthread...");
+	priv->main_thread.priv = priv;
+	spin_lock_init(&priv->driver_lock);
+
+	init_waitqueue_head(&priv->main_thread.wait_q);
+	priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
+				&priv->main_thread, "btmrvl_main_service");
+	if (IS_ERR(priv->main_thread.task))
+		goto err_thread;
+
+	priv->btmrvl_dev.card = card;
+	priv->btmrvl_dev.tx_dnld_rdy = true;
+
+	return priv;
+
+err_thread:
+	btmrvl_free_adapter(priv);
+
+err_adapter:
+	kfree(priv);
+
+err_priv:
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(btmrvl_add_card);
+
+int btmrvl_remove_card(struct btmrvl_private *priv)
+{
+	struct hci_dev *hdev;
+
+	hdev = priv->btmrvl_dev.hcidev;
+
+	wake_up_interruptible(&priv->adapter->cmd_wait_q);
+	wake_up_interruptible(&priv->adapter->event_hs_wait_q);
+
+	kthread_stop(priv->main_thread.task);
+
+#ifdef CONFIG_DEBUG_FS
+	btmrvl_debugfs_remove(hdev);
+#endif
+
+	hci_unregister_dev(hdev);
+
+	hci_free_dev(hdev);
+
+	priv->btmrvl_dev.hcidev = NULL;
+
+	btmrvl_free_adapter(priv);
+
+	kfree(priv);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btmrvl_remove_card);
+
+MODULE_AUTHOR("Marvell International Ltd.");
+MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL v2");