feat: enable BT_RTKBT as module

Signed-off-by: Han Gao/Revy/Rabenda <gaohan@iscas.ac.cn>

arch/riscv/configs/beaglev_defconfig

@@ -1319,7 +1319,6 @@ CONFIG_BT_DEBUGFS=y
 # CONFIG_BT_HCIBTSDIO is not set
 CONFIG_BT_HCIUART=y
 CONFIG_BT_HCIUART_H4=y
-CONFIG_BT_HCIUART_RTL3WIRE=y
 # CONFIG_BT_HCIUART_BCSP is not set
 # CONFIG_BT_HCIUART_ATH3K is not set
 # CONFIG_BT_HCIUART_INTEL is not set

drivers/bluetooth/Kconfig

@@ -115,14 +115,6 @@ config BT_HCIUART_H4
 
 	  Say Y here to compile support for HCI UART (H4) protocol.
 
-config BT_HCIUART_RTL3WIRE
-	bool "Realtek Three-wire UART (H5) protocol support"
-	depends on BT_HCIUART
-	help
-		Realtek Three-wire UART (H5) transport layer makes it possible
-		to use Realtek Bluetooth controller with Three-wire UART.
-		Say Y here to compile support for Realtek Three-wire UART.
-
 config BT_HCIUART_NOKIA
 	tristate "UART Nokia H4+ protocol support"
 	depends on BT_HCIUART
@@ -433,4 +425,6 @@ config BT_HCIRSI
 	  Say Y here to compile support for HCI over Redpine into the
 	  kernel or say M to compile as a module.
 
+source "drivers/bluetooth/rtkbt/Kconfig"
+
 endmenu

drivers/bluetooth/Makefile

@@ -45,6 +45,6 @@ hci_uart-$(CONFIG_BT_HCIUART_BCM)	+= hci_bcm.o
 hci_uart-$(CONFIG_BT_HCIUART_QCA)	+= hci_qca.o
 hci_uart-$(CONFIG_BT_HCIUART_AG6XX)	+= hci_ag6xx.o
 hci_uart-$(CONFIG_BT_HCIUART_MRVL)	+= hci_mrvl.o
-hci_uart-y += rtk_coex.o
-hci_uart-$(CONFIG_BT_HCIUART_RTL3WIRE) += hci_rtk_h5.o
 hci_uart-objs				:= $(hci_uart-y)
+
+obj-$(CONFIG_BT_RTKBT) += rtkbt/

drivers/bluetooth/hci_bcm.c

@@ -654,7 +654,6 @@ static const struct h4_recv_pkt bcm_recv_pkts[] = {
 	{ H4_RECV_ACL,      .recv = hci_recv_frame },
 	{ H4_RECV_SCO,      .recv = hci_recv_frame },
 	{ H4_RECV_EVENT,    .recv = hci_recv_frame },
-	{ H4_RECV_ISO,      .recv = hci_recv_frame },
 	{ BCM_RECV_LM_DIAG, .recv = hci_recv_diag  },
 	{ BCM_RECV_NULL,    .recv = hci_recv_diag  },
 	{ BCM_RECV_TYPE49,  .recv = hci_recv_diag  },

drivers/bluetooth/hci_h4.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *
  *  Bluetooth HCI UART driver
@@ -5,25 +6,10 @@
  *  Copyright (C) 2000-2001  Qualcomm Incorporated
  *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
  *  Copyright (C) 2004-2005  Marcel Holtmann <marcel@holtmann.org>
- *
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  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/types.h>
@@ -31,6 +17,7 @@
 #include <linux/interrupt.h>
 #include <linux/ptrace.h>
 #include <linux/poll.h>
+
 #include <linux/slab.h>
 #include <linux/tty.h>
 #include <linux/errno.h>
@@ -38,32 +25,18 @@
 #include <linux/signal.h>
 #include <linux/ioctl.h>
 #include <linux/skbuff.h>
+#include <asm/unaligned.h>
+
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
-#include <linux/version.h>
 
 #include "hci_uart.h"
 
-#ifdef BTCOEX
-#include "rtk_coex.h"
-#endif
-
-//#define VERSION "1.2"
-
 struct h4_struct {
-	unsigned long rx_state;
-	unsigned long rx_count;
 	struct sk_buff *rx_skb;
 	struct sk_buff_head txq;
 };
 
-/* H4 receiver States */
-#define H4_W4_PACKET_TYPE	0
-#define H4_W4_EVENT_HDR		1
-#define H4_W4_ACL_HDR		2
-#define H4_W4_SCO_HDR		3
-#define H4_W4_DATA		4
-
 /* Initialize protocol */
 static int h4_open(struct hci_uart *hu)
 {
@@ -71,7 +44,7 @@ static int h4_open(struct hci_uart *hu)
 
 	BT_DBG("hu %p", hu);
 
-	h4 = kzalloc(sizeof(*h4), GFP_ATOMIC);
+	h4 = kzalloc(sizeof(*h4), GFP_KERNEL);
 	if (!h4)
 		return -ENOMEM;
 
@@ -98,8 +71,6 @@ static int h4_close(struct hci_uart *hu)
 {
 	struct h4_struct *h4 = hu->priv;
 
-	hu->priv = NULL;
-
 	BT_DBG("hu %p", hu);
 
 	skb_queue_purge(&h4->txq);
@@ -112,7 +83,7 @@ static int h4_close(struct hci_uart *hu)
 	return 0;
 }
 
-/* Enqueue frame for transmittion (padding, crc, etc) */
+/* Enqueue frame for transmission (padding, crc, etc) */
 static int h4_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 {
 	struct h4_struct *h4 = hu->priv;
@@ -120,174 +91,34 @@ static int h4_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 	BT_DBG("hu %p skb %p", hu, skb);
 
 	/* Prepend skb with frame type */
-	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
+	memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
 	skb_queue_tail(&h4->txq, skb);
 
 	return 0;
 }
 
-#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
-static inline int h4_check_data_len(struct h4_struct *h4, int len)
-#else
-static inline int h4_check_data_len(struct hci_dev *hdev, struct h4_struct *h4, int len)
-#endif
-{
-	register int room = skb_tailroom(h4->rx_skb);
-
-	BT_DBG("len %d room %d", len, room);
-
-	if (!len) {
-#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
-		hci_recv_frame(h4->rx_skb);
-#else
-		hci_recv_frame(hdev, h4->rx_skb);
-#endif
-	} else if (len > room) {
-		BT_ERR("Data length is too large");
-		kfree_skb(h4->rx_skb);
-	} else {
-		h4->rx_state = H4_W4_DATA;
-		h4->rx_count = len;
-		return len;
-	}
-
-	h4->rx_state = H4_W4_PACKET_TYPE;
-	h4->rx_skb   = NULL;
-	h4->rx_count = 0;
-
-	return 0;
-}
+static const struct h4_recv_pkt h4_recv_pkts[] = {
+	{ H4_RECV_ACL,   .recv = hci_recv_frame },
+	{ H4_RECV_SCO,   .recv = hci_recv_frame },
+	{ H4_RECV_EVENT, .recv = hci_recv_frame },
+	{ H4_RECV_ISO,   .recv = hci_recv_frame },
+};
 
 /* Recv data */
-static int h4_recv(struct hci_uart *hu, void *data, int count)
+static int h4_recv(struct hci_uart *hu, const void *data, int count)
 {
 	struct h4_struct *h4 = hu->priv;
-	register char *ptr;
-	struct hci_event_hdr *eh;
-	struct hci_acl_hdr   *ah;
-	struct hci_sco_hdr   *sh;
-	register int len, type, dlen;
 
-	BT_DBG("hu %p count %d rx_state %ld rx_count %ld", 
-			hu, count, h4->rx_state, h4->rx_count);
+	if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
+		return -EUNATCH;
 
-	ptr = data;
-	while (count) {
-		if (h4->rx_count) {
-			len = min_t(unsigned int, h4->rx_count, count);
-			memcpy(skb_put(h4->rx_skb, len), ptr, len);
-			h4->rx_count -= len; count -= len; ptr += len;
-
-			if (h4->rx_count)
-				continue;
-
-			switch (h4->rx_state) {
-			case H4_W4_DATA:
-				BT_DBG("Complete data");
-#ifdef BTCOEX
-				if(bt_cb(h4->rx_skb)->pkt_type == HCI_EVENT_PKT)
-					rtk_btcoex_parse_event(
-							h4->rx_skb->data,
-							h4->rx_skb->len);
-
-				if(bt_cb(h4->rx_skb)->pkt_type == HCI_ACLDATA_PKT)
-					rtk_btcoex_parse_l2cap_data_rx(
-							h4->rx_skb->data,
-							h4->rx_skb->len);
-#endif
-
-#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
-				hci_recv_frame(h4->rx_skb);
-#else
-				hci_recv_frame(hu->hdev, h4->rx_skb);
-#endif
-
-				h4->rx_state = H4_W4_PACKET_TYPE;
-				h4->rx_skb = NULL;
-				continue;
-
-			case H4_W4_EVENT_HDR:
-				eh = hci_event_hdr(h4->rx_skb);
-
-				BT_DBG("Event header: evt 0x%2.2x plen %d", eh->evt, eh->plen);
-
-#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
-				h4_check_data_len(h4, eh->plen);
-#else
-				h4_check_data_len(hu->hdev, h4, eh->plen);
-#endif
-				continue;
-
-			case H4_W4_ACL_HDR:
-				ah = hci_acl_hdr(h4->rx_skb);
-				dlen = __le16_to_cpu(ah->dlen);
-
-				BT_DBG("ACL header: dlen %d", dlen);
-
-#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
-				h4_check_data_len(h4, dlen);
-#else
-				h4_check_data_len(hu->hdev, h4, dlen);
-#endif
-				continue;
-
-			case H4_W4_SCO_HDR:
-				sh = hci_sco_hdr(h4->rx_skb);
-
-				BT_DBG("SCO header: dlen %d", sh->dlen);
-
-#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
-				h4_check_data_len(h4, sh->dlen);
-#else
-				h4_check_data_len(hu->hdev, h4, sh->dlen);
-#endif
-				continue;
-			}
-		}
-
-		/* H4_W4_PACKET_TYPE */
-		switch (*ptr) {
-		case HCI_EVENT_PKT:
-			BT_DBG("Event packet");
-			h4->rx_state = H4_W4_EVENT_HDR;
-			h4->rx_count = HCI_EVENT_HDR_SIZE;
-			type = HCI_EVENT_PKT;
-			break;
-
-		case HCI_ACLDATA_PKT:
-			BT_DBG("ACL packet");
-			h4->rx_state = H4_W4_ACL_HDR;
-			h4->rx_count = HCI_ACL_HDR_SIZE;
-			type = HCI_ACLDATA_PKT;
-			break;
-
-		case HCI_SCODATA_PKT:
-			BT_DBG("SCO packet");
-			h4->rx_state = H4_W4_SCO_HDR;
-			h4->rx_count = HCI_SCO_HDR_SIZE;
-			type = HCI_SCODATA_PKT;
-			break;
-
-		default:
-			BT_ERR("Unknown HCI packet type %2.2x", (__u8)*ptr);
-			hu->hdev->stat.err_rx++;
-			ptr++; count--;
-			continue;
-		};
-
-		ptr++; count--;
-
-		/* Allocate packet */
-		h4->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
-		if (!h4->rx_skb) {
-			BT_ERR("Can't allocate mem for new packet");
-			h4->rx_state = H4_W4_PACKET_TYPE;
-			h4->rx_count = 0;
-			return -ENOMEM;
-		}
-
-		h4->rx_skb->dev = (void *) hu->hdev;
-		bt_cb(h4->rx_skb)->pkt_type = type;
+	h4->rx_skb = h4_recv_buf(hu->hdev, h4->rx_skb, data, count,
+				 h4_recv_pkts, ARRAY_SIZE(h4_recv_pkts));
+	if (IS_ERR(h4->rx_skb)) {
+		int err = PTR_ERR(h4->rx_skb);
+		bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
+		h4->rx_skb = NULL;
+		return err;
 	}
 
 	return count;
@@ -299,8 +130,9 @@ static struct sk_buff *h4_dequeue(struct hci_uart *hu)
 	return skb_dequeue(&h4->txq);
 }
 
-static struct hci_uart_proto h4p = {
+static const struct hci_uart_proto h4p = {
 	.id		= HCI_UART_H4,
+	.name		= "H4",
 	.open		= h4_open,
 	.close		= h4_close,
 	.recv		= h4_recv,
@@ -311,17 +143,132 @@ static struct hci_uart_proto h4p = {
 
 int __init h4_init(void)
 {
-	int err = hci_uart_register_proto(&h4p);
-
-	if (!err)
-		BT_INFO("HCI H4 protocol initialized");
-	else
-		BT_ERR("HCI H4 protocol registration failed");
-
-	return err;
+	return hci_uart_register_proto(&h4p);
 }
 
 int __exit h4_deinit(void)
 {
 	return hci_uart_unregister_proto(&h4p);
 }
+
+struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
+			    const unsigned char *buffer, int count,
+			    const struct h4_recv_pkt *pkts, int pkts_count)
+{
+	struct hci_uart *hu = hci_get_drvdata(hdev);
+	u8 alignment = hu->alignment ? hu->alignment : 1;
+
+	/* Check for error from previous call */
+	if (IS_ERR(skb))
+		skb = NULL;
+
+	while (count) {
+		int i, len;
+
+		/* remove padding bytes from buffer */
+		for (; hu->padding && count > 0; hu->padding--) {
+			count--;
+			buffer++;
+		}
+		if (!count)
+			break;
+
+		if (!skb) {
+			for (i = 0; i < pkts_count; i++) {
+				if (buffer[0] != (&pkts[i])->type)
+					continue;
+
+				skb = bt_skb_alloc((&pkts[i])->maxlen,
+						   GFP_ATOMIC);
+				if (!skb)
+					return ERR_PTR(-ENOMEM);
+
+				hci_skb_pkt_type(skb) = (&pkts[i])->type;
+				hci_skb_expect(skb) = (&pkts[i])->hlen;
+				break;
+			}
+
+			/* Check for invalid packet type */
+			if (!skb)
+				return ERR_PTR(-EILSEQ);
+
+			count -= 1;
+			buffer += 1;
+		}
+
+		len = min_t(uint, hci_skb_expect(skb) - skb->len, count);
+		skb_put_data(skb, buffer, len);
+
+		count -= len;
+		buffer += len;
+
+		/* Check for partial packet */
+		if (skb->len < hci_skb_expect(skb))
+			continue;
+
+		for (i = 0; i < pkts_count; i++) {
+			if (hci_skb_pkt_type(skb) == (&pkts[i])->type)
+				break;
+		}
+
+		if (i >= pkts_count) {
+			kfree_skb(skb);
+			return ERR_PTR(-EILSEQ);
+		}
+
+		if (skb->len == (&pkts[i])->hlen) {
+			u16 dlen;
+
+			switch ((&pkts[i])->lsize) {
+			case 0:
+				/* No variable data length */
+				dlen = 0;
+				break;
+			case 1:
+				/* Single octet variable length */
+				dlen = skb->data[(&pkts[i])->loff];
+				hci_skb_expect(skb) += dlen;
+
+				if (skb_tailroom(skb) < dlen) {
+					kfree_skb(skb);
+					return ERR_PTR(-EMSGSIZE);
+				}
+				break;
+			case 2:
+				/* Double octet variable length */
+				dlen = get_unaligned_le16(skb->data +
+							  (&pkts[i])->loff);
+				hci_skb_expect(skb) += dlen;
+
+				if (skb_tailroom(skb) < dlen) {
+					kfree_skb(skb);
+					return ERR_PTR(-EMSGSIZE);
+				}
+				break;
+			default:
+				/* Unsupported variable length */
+				kfree_skb(skb);
+				return ERR_PTR(-EILSEQ);
+			}
+
+			if (!dlen) {
+				hu->padding = (skb->len - 1) % alignment;
+				hu->padding = (alignment - hu->padding) % alignment;
+
+				/* No more data, complete frame */
+				(&pkts[i])->recv(hdev, skb);
+				skb = NULL;
+			}
+		} else {
+			hu->padding = (skb->len - 1) % alignment;
+			hu->padding = (alignment - hu->padding) % alignment;
+
+			/* Complete frame */
+			(&pkts[i])->recv(hdev, skb);
+			skb = NULL;
+		}
+	}
+
+	return skb;
+}
+EXPORT_SYMBOL_GPL(h4_recv_buf);

drivers/bluetooth/hci_uart.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *
  *  Bluetooth HCI UART driver
@@ -5,50 +6,12 @@
  *  Copyright (C) 2000-2001  Qualcomm Incorporated
  *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
  *  Copyright (C) 2004-2005  Marcel Holtmann <marcel@holtmann.org>
- *
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  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/version.h>
-#include <net/bluetooth/bluetooth.h>
-#include <net/bluetooth/hci_core.h>
-
-/* #define HCI_VERSION_CODE KERNEL_VERSION(3, 14, 41) */
-#define HCI_VERSION_CODE LINUX_VERSION_CODE
 
 #ifndef N_HCI
 #define N_HCI	15
 #endif
 
-#ifndef CONFIG_BT_HCIUART_H4
-#define CONFIG_BT_HCIUART_H4
-#endif
-
-#define BTCOEX
-
-/* Send host sleep notification to Controller */
-#define WOBT_NOTIFY		0	/* 1  enable; 0  disable */
-
-/* Send LE whitelist only for Background scan parameters */
-#define WOBT_NOTIFY_BG_SCAN_LE_WHITELIST_ONLY	(0 * WOBT_NOTIFY)	/* 1  enable; 0  disable */
-
-/* RTKBT Power-on Whitelist for sideband wake-up by LE Advertising from Remote.
-* Note that it's necessary to apply TV FW Patch. */
-#define RTKBT_TV_POWERON_WHITELIST	(0 * WOBT_NOTIFY)	/* 1  enable; 0  disable */
-
 /* Ioctls */
 #define HCIUARTSETPROTO		_IOW('U', 200, int)
 #define HCIUARTGETPROTO		_IOR('U', 201, int)
@@ -57,7 +20,7 @@
 #define HCIUARTGETFLAGS		_IOR('U', 204, int)
 
 /* UART protocols */
-#define HCI_UART_MAX_PROTO	6
+#define HCI_UART_MAX_PROTO	12
 
 #define HCI_UART_H4	0
 #define HCI_UART_BCSP	1
@@ -65,6 +28,12 @@
 #define HCI_UART_H4DS	3
 #define HCI_UART_LL	4
 #define HCI_UART_ATH3K	5
+#define HCI_UART_INTEL	6
+#define HCI_UART_BCM	7
+#define HCI_UART_QCA	8
+#define HCI_UART_AG6XX	9
+#define HCI_UART_NOKIA	10
+#define HCI_UART_MRVL	11
 
 #define HCI_UART_RAW_DEVICE	0
 #define HCI_UART_RESET_ON_INIT	1
@@ -74,42 +43,46 @@
 #define HCI_UART_VND_DETECT	5
 
 struct hci_uart;
+struct serdev_device;
 
 struct hci_uart_proto {
 	unsigned int id;
+	const char *name;
+	unsigned int manufacturer;
+	unsigned int init_speed;
+	unsigned int oper_speed;
 	int (*open)(struct hci_uart *hu);
 	int (*close)(struct hci_uart *hu);
 	int (*flush)(struct hci_uart *hu);
-	int (*recv)(struct hci_uart *hu, void *data, int len);
+	int (*setup)(struct hci_uart *hu);
+	int (*set_baudrate)(struct hci_uart *hu, unsigned int speed);
+	int (*recv)(struct hci_uart *hu, const void *data, int len);
 	int (*enqueue)(struct hci_uart *hu, struct sk_buff *skb);
 	struct sk_buff *(*dequeue)(struct hci_uart *hu);
 };
 
 struct hci_uart {
 	struct tty_struct	*tty;
+	struct serdev_device	*serdev;
 	struct hci_dev		*hdev;
 	unsigned long		flags;
 	unsigned long		hdev_flags;
 
+	struct work_struct	init_ready;
 	struct work_struct	write_work;
-	struct workqueue_struct *hci_uart_wq;
 
-	struct hci_uart_proto	*proto;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)
-	struct percpu_rw_semaphore proto_lock; /* Stop work for proto close */
-#else
-	struct rw_semaphore proto_lock;
-#endif
+	const struct hci_uart_proto *proto;
+	struct percpu_rw_semaphore proto_lock;	/* Stop work for proto close */
 	void			*priv;
 
-	struct semaphore tx_sem;	/* semaphore for tx */
-
 	struct sk_buff		*tx_skb;
 	unsigned long		tx_state;
 
-#if WOBT_NOTIFY
-	struct notifier_block pm_notify_block;
-#endif
+	unsigned int init_speed;
+	unsigned int oper_speed;
+
+	u8			alignment;
+	u8			padding;
 };
 
 /* HCI_UART proto flag bits */
@@ -121,20 +94,108 @@ struct hci_uart {
 #define HCI_UART_SENDING	1
 #define HCI_UART_TX_WAKEUP	2
 
-extern int hci_uart_register_proto(struct hci_uart_proto *p);
-extern int hci_uart_unregister_proto(struct hci_uart_proto *p);
-extern int hci_uart_tx_wakeup(struct hci_uart *hu);
+int hci_uart_register_proto(const struct hci_uart_proto *p);
+int hci_uart_unregister_proto(const struct hci_uart_proto *p);
+int hci_uart_register_device(struct hci_uart *hu, const struct hci_uart_proto *p);
+void hci_uart_unregister_device(struct hci_uart *hu);
+
+int hci_uart_tx_wakeup(struct hci_uart *hu);
+int hci_uart_wait_until_sent(struct hci_uart *hu);
+int hci_uart_init_ready(struct hci_uart *hu);
+void hci_uart_init_work(struct work_struct *work);
+void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed);
+bool hci_uart_has_flow_control(struct hci_uart *hu);
+void hci_uart_set_flow_control(struct hci_uart *hu, bool enable);
+void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed,
+			 unsigned int oper_speed);
 
 #ifdef CONFIG_BT_HCIUART_H4
-extern int h4_init(void);
-extern int h4_deinit(void);
+int h4_init(void);
+int h4_deinit(void);
+
+struct h4_recv_pkt {
+	u8  type;	/* Packet type */
+	u8  hlen;	/* Header length */
+	u8  loff;	/* Data length offset in header */
+	u8  lsize;	/* Data length field size */
+	u16 maxlen;	/* Max overall packet length */
+	int (*recv)(struct hci_dev *hdev, struct sk_buff *skb);
+};
+
+#define H4_RECV_ACL \
+	.type = HCI_ACLDATA_PKT, \
+	.hlen = HCI_ACL_HDR_SIZE, \
+	.loff = 2, \
+	.lsize = 2, \
+	.maxlen = HCI_MAX_FRAME_SIZE \
+
+#define H4_RECV_SCO \
+	.type = HCI_SCODATA_PKT, \
+	.hlen = HCI_SCO_HDR_SIZE, \
+	.loff = 2, \
+	.lsize = 1, \
+	.maxlen = HCI_MAX_SCO_SIZE
+
+#define H4_RECV_EVENT \
+	.type = HCI_EVENT_PKT, \
+	.hlen = HCI_EVENT_HDR_SIZE, \
+	.loff = 1, \
+	.lsize = 1, \
+	.maxlen = HCI_MAX_EVENT_SIZE
+
+#define H4_RECV_ISO \
+	.type = HCI_ISODATA_PKT, \
+	.hlen = HCI_ISO_HDR_SIZE, \
+	.loff = 2, \
+	.lsize = 2, \
+	.maxlen = HCI_MAX_FRAME_SIZE \
+
+struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
+			    const unsigned char *buffer, int count,
+			    const struct h4_recv_pkt *pkts, int pkts_count);
 #endif
 
-extern int h5_init(void);
-extern int h5_deinit(void);
-
-#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
-extern int hci_uart_send_frame(struct sk_buff *skb);
-#else
-extern int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb);
+#ifdef CONFIG_BT_HCIUART_BCSP
+int bcsp_init(void);
+int bcsp_deinit(void);
+#endif
+
+#ifdef CONFIG_BT_HCIUART_LL
+int ll_init(void);
+int ll_deinit(void);
+#endif
+
+#ifdef CONFIG_BT_HCIUART_ATH3K
+int ath_init(void);
+int ath_deinit(void);
+#endif
+
+#ifdef CONFIG_BT_HCIUART_3WIRE
+int h5_init(void);
+int h5_deinit(void);
+#endif
+
+#ifdef CONFIG_BT_HCIUART_INTEL
+int intel_init(void);
+int intel_deinit(void);
+#endif
+
+#ifdef CONFIG_BT_HCIUART_BCM
+int bcm_init(void);
+int bcm_deinit(void);
+#endif
+
+#ifdef CONFIG_BT_HCIUART_QCA
+int qca_init(void);
+int qca_deinit(void);
+#endif
+
+#ifdef CONFIG_BT_HCIUART_AG6XX
+int ag6xx_init(void);
+int ag6xx_deinit(void);
+#endif
+
+#ifdef CONFIG_BT_HCIUART_MRVL
+int mrvl_init(void);
+int mrvl_deinit(void);
 #endif

drivers/bluetooth/rtkbt/Kconfig

@@ -0,0 +1,5 @@
+config BT_RTKBT
+	tristate "BT_RTKBT"
+	default n
+	help
+	  Help message of RTKBT

drivers/bluetooth/rtkbt/Makefile

@@ -0,0 +1,2 @@
+obj-$(CONFIG_BT_RTKBT)			:= rtkbt.o
+rtkbt-objs		:= hci_ldisc.o hci_h4.o hci_rtk_h5.o rtk_coex.o

drivers/bluetooth/rtkbt/hci_h4.c

@@ -0,0 +1,327 @@
+/*
+ *
+ *  Bluetooth HCI UART driver
+ *
+ *  Copyright (C) 2000-2001  Qualcomm Incorporated
+ *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
+ *  Copyright (C) 2004-2005  Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/poll.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/signal.h>
+#include <linux/ioctl.h>
+#include <linux/skbuff.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <linux/version.h>
+
+#include "hci_uart.h"
+
+#ifdef BTCOEX
+#include "rtk_coex.h"
+#endif
+
+//#define VERSION "1.2"
+
+struct h4_struct {
+	unsigned long rx_state;
+	unsigned long rx_count;
+	struct sk_buff *rx_skb;
+	struct sk_buff_head txq;
+};
+
+/* H4 receiver States */
+#define H4_W4_PACKET_TYPE	0
+#define H4_W4_EVENT_HDR		1
+#define H4_W4_ACL_HDR		2
+#define H4_W4_SCO_HDR		3
+#define H4_W4_DATA		4
+
+/* Initialize protocol */
+static int h4_open(struct hci_uart *hu)
+{
+	struct h4_struct *h4;
+
+	BT_DBG("hu %p", hu);
+
+	h4 = kzalloc(sizeof(*h4), GFP_ATOMIC);
+	if (!h4)
+		return -ENOMEM;
+
+	skb_queue_head_init(&h4->txq);
+
+	hu->priv = h4;
+	return 0;
+}
+
+/* Flush protocol data */
+static int h4_flush(struct hci_uart *hu)
+{
+	struct h4_struct *h4 = hu->priv;
+
+	BT_DBG("hu %p", hu);
+
+	skb_queue_purge(&h4->txq);
+
+	return 0;
+}
+
+/* Close protocol */
+static int h4_close(struct hci_uart *hu)
+{
+	struct h4_struct *h4 = hu->priv;
+
+	hu->priv = NULL;
+
+	BT_DBG("hu %p", hu);
+
+	skb_queue_purge(&h4->txq);
+
+	kfree_skb(h4->rx_skb);
+
+	hu->priv = NULL;
+	kfree(h4);
+
+	return 0;
+}
+
+/* Enqueue frame for transmittion (padding, crc, etc) */
+static int h4_enqueue(struct hci_uart *hu, struct sk_buff *skb)
+{
+	struct h4_struct *h4 = hu->priv;
+
+	BT_DBG("hu %p skb %p", hu, skb);
+
+	/* Prepend skb with frame type */
+	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
+	skb_queue_tail(&h4->txq, skb);
+
+	return 0;
+}
+
+#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+static inline int h4_check_data_len(struct h4_struct *h4, int len)
+#else
+static inline int h4_check_data_len(struct hci_dev *hdev, struct h4_struct *h4, int len)
+#endif
+{
+	register int room = skb_tailroom(h4->rx_skb);
+
+	BT_DBG("len %d room %d", len, room);
+
+	if (!len) {
+#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+		hci_recv_frame(h4->rx_skb);
+#else
+		hci_recv_frame(hdev, h4->rx_skb);
+#endif
+	} else if (len > room) {
+		BT_ERR("Data length is too large");
+		kfree_skb(h4->rx_skb);
+	} else {
+		h4->rx_state = H4_W4_DATA;
+		h4->rx_count = len;
+		return len;
+	}
+
+	h4->rx_state = H4_W4_PACKET_TYPE;
+	h4->rx_skb   = NULL;
+	h4->rx_count = 0;
+
+	return 0;
+}
+
+/* Recv data */
+static int h4_recv(struct hci_uart *hu, void *data, int count)
+{
+	struct h4_struct *h4 = hu->priv;
+	register char *ptr;
+	struct hci_event_hdr *eh;
+	struct hci_acl_hdr   *ah;
+	struct hci_sco_hdr   *sh;
+	register int len, type, dlen;
+
+	BT_DBG("hu %p count %d rx_state %ld rx_count %ld", 
+			hu, count, h4->rx_state, h4->rx_count);
+
+	ptr = data;
+	while (count) {
+		if (h4->rx_count) {
+			len = min_t(unsigned int, h4->rx_count, count);
+			memcpy(skb_put(h4->rx_skb, len), ptr, len);
+			h4->rx_count -= len; count -= len; ptr += len;
+
+			if (h4->rx_count)
+				continue;
+
+			switch (h4->rx_state) {
+			case H4_W4_DATA:
+				BT_DBG("Complete data");
+#ifdef BTCOEX
+				if(bt_cb(h4->rx_skb)->pkt_type == HCI_EVENT_PKT)
+					rtk_btcoex_parse_event(
+							h4->rx_skb->data,
+							h4->rx_skb->len);
+
+				if(bt_cb(h4->rx_skb)->pkt_type == HCI_ACLDATA_PKT)
+					rtk_btcoex_parse_l2cap_data_rx(
+							h4->rx_skb->data,
+							h4->rx_skb->len);
+#endif
+
+#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+				hci_recv_frame(h4->rx_skb);
+#else
+				hci_recv_frame(hu->hdev, h4->rx_skb);
+#endif
+
+				h4->rx_state = H4_W4_PACKET_TYPE;
+				h4->rx_skb = NULL;
+				continue;
+
+			case H4_W4_EVENT_HDR:
+				eh = hci_event_hdr(h4->rx_skb);
+
+				BT_DBG("Event header: evt 0x%2.2x plen %d", eh->evt, eh->plen);
+
+#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+				h4_check_data_len(h4, eh->plen);
+#else
+				h4_check_data_len(hu->hdev, h4, eh->plen);
+#endif
+				continue;
+
+			case H4_W4_ACL_HDR:
+				ah = hci_acl_hdr(h4->rx_skb);
+				dlen = __le16_to_cpu(ah->dlen);
+
+				BT_DBG("ACL header: dlen %d", dlen);
+
+#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+				h4_check_data_len(h4, dlen);
+#else
+				h4_check_data_len(hu->hdev, h4, dlen);
+#endif
+				continue;
+
+			case H4_W4_SCO_HDR:
+				sh = hci_sco_hdr(h4->rx_skb);
+
+				BT_DBG("SCO header: dlen %d", sh->dlen);
+
+#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+				h4_check_data_len(h4, sh->dlen);
+#else
+				h4_check_data_len(hu->hdev, h4, sh->dlen);
+#endif
+				continue;
+			}
+		}
+
+		/* H4_W4_PACKET_TYPE */
+		switch (*ptr) {
+		case HCI_EVENT_PKT:
+			BT_DBG("Event packet");
+			h4->rx_state = H4_W4_EVENT_HDR;
+			h4->rx_count = HCI_EVENT_HDR_SIZE;
+			type = HCI_EVENT_PKT;
+			break;
+
+		case HCI_ACLDATA_PKT:
+			BT_DBG("ACL packet");
+			h4->rx_state = H4_W4_ACL_HDR;
+			h4->rx_count = HCI_ACL_HDR_SIZE;
+			type = HCI_ACLDATA_PKT;
+			break;
+
+		case HCI_SCODATA_PKT:
+			BT_DBG("SCO packet");
+			h4->rx_state = H4_W4_SCO_HDR;
+			h4->rx_count = HCI_SCO_HDR_SIZE;
+			type = HCI_SCODATA_PKT;
+			break;
+
+		default:
+			BT_ERR("Unknown HCI packet type %2.2x", (__u8)*ptr);
+			hu->hdev->stat.err_rx++;
+			ptr++; count--;
+			continue;
+		};
+
+		ptr++; count--;
+
+		/* Allocate packet */
+		h4->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
+		if (!h4->rx_skb) {
+			BT_ERR("Can't allocate mem for new packet");
+			h4->rx_state = H4_W4_PACKET_TYPE;
+			h4->rx_count = 0;
+			return -ENOMEM;
+		}
+
+		h4->rx_skb->dev = (void *) hu->hdev;
+		bt_cb(h4->rx_skb)->pkt_type = type;
+	}
+
+	return count;
+}
+
+static struct sk_buff *h4_dequeue(struct hci_uart *hu)
+{
+	struct h4_struct *h4 = hu->priv;
+	return skb_dequeue(&h4->txq);
+}
+
+static struct hci_uart_proto h4p = {
+	.id		= HCI_UART_H4,
+	.open		= h4_open,
+	.close		= h4_close,
+	.recv		= h4_recv,
+	.enqueue	= h4_enqueue,
+	.dequeue	= h4_dequeue,
+	.flush		= h4_flush,
+};
+
+int __init h4_init(void)
+{
+	int err = hci_uart_register_proto(&h4p);
+
+	if (!err)
+		BT_INFO("HCI H4 protocol initialized");
+	else
+		BT_ERR("HCI H4 protocol registration failed");
+
+	return err;
+}
+
+int __exit h4_deinit(void)
+{
+	return hci_uart_unregister_proto(&h4p);
+}

drivers/bluetooth/rtkbt/hci_uart.h

@@ -0,0 +1,145 @@
+/*
+ *
+ *  Bluetooth HCI UART driver
+ *
+ *  Copyright (C) 2000-2001  Qualcomm Incorporated
+ *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
+ *  Copyright (C) 2004-2005  Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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/version.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+/* #define HCI_VERSION_CODE KERNEL_VERSION(3, 14, 41) */
+#define HCI_VERSION_CODE LINUX_VERSION_CODE
+
+#ifndef N_HCI
+#define N_HCI	15
+#endif
+
+#ifndef CONFIG_BT_HCIUART_H4
+#define CONFIG_BT_HCIUART_H4
+#endif
+
+#define BTCOEX
+
+/* Send host sleep notification to Controller */
+#define WOBT_NOTIFY		0	/* 1  enable; 0  disable */
+
+/* Send LE whitelist only for Background scan parameters */
+#define WOBT_NOTIFY_BG_SCAN_LE_WHITELIST_ONLY	(0 * WOBT_NOTIFY)	/* 1  enable; 0  disable */
+
+/* RTKBT Power-on Whitelist for sideband wake-up by LE Advertising from Remote.
+* Note that it's necessary to apply TV FW Patch. */
+#define RTKBT_TV_POWERON_WHITELIST	(0 * WOBT_NOTIFY)	/* 1  enable; 0  disable */
+
+/* RTKBT Power-on Data Filter for Manufacturer field */
+/* Note that please edit the datafilter in
+ *   rtkbt_set_le_device_poweron_data_filter() of hci_ldisc.c */
+#define RTKBT_TV_POWERON_DATA_FILTER	(0 * WOBT_NOTIFY)	/* 1  enable; 0  disable */
+
+/* Ioctls */
+#define HCIUARTSETPROTO		_IOW('U', 200, int)
+#define HCIUARTGETPROTO		_IOR('U', 201, int)
+#define HCIUARTGETDEVICE	_IOR('U', 202, int)
+#define HCIUARTSETFLAGS		_IOW('U', 203, int)
+#define HCIUARTGETFLAGS		_IOR('U', 204, int)
+
+/* UART protocols */
+#define HCI_UART_MAX_PROTO	6
+
+#define HCI_UART_H4	0
+#define HCI_UART_BCSP	1
+#define HCI_UART_3WIRE	2
+#define HCI_UART_H4DS	3
+#define HCI_UART_LL	4
+#define HCI_UART_ATH3K	5
+
+#define HCI_UART_RAW_DEVICE	0
+#define HCI_UART_RESET_ON_INIT	1
+#define HCI_UART_CREATE_AMP	2
+#define HCI_UART_INIT_PENDING	3
+#define HCI_UART_EXT_CONFIG	4
+#define HCI_UART_VND_DETECT	5
+
+struct hci_uart;
+
+struct hci_uart_proto {
+	unsigned int id;
+	int (*open)(struct hci_uart *hu);
+	int (*close)(struct hci_uart *hu);
+	int (*flush)(struct hci_uart *hu);
+	int (*recv)(struct hci_uart *hu, void *data, int len);
+	int (*enqueue)(struct hci_uart *hu, struct sk_buff *skb);
+	struct sk_buff *(*dequeue)(struct hci_uart *hu);
+};
+
+struct hci_uart {
+	struct tty_struct	*tty;
+	struct hci_dev		*hdev;
+	unsigned long		flags;
+	unsigned long		hdev_flags;
+
+	struct work_struct	write_work;
+	struct workqueue_struct *hci_uart_wq;
+
+	struct hci_uart_proto	*proto;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)
+	struct percpu_rw_semaphore proto_lock; /* Stop work for proto close */
+#else
+	struct rw_semaphore proto_lock;
+#endif
+	void			*priv;
+
+	struct semaphore tx_sem;	/* semaphore for tx */
+
+	struct sk_buff		*tx_skb;
+	unsigned long		tx_state;
+
+#if WOBT_NOTIFY
+	struct notifier_block pm_notify_block;
+#endif
+};
+
+/* HCI_UART proto flag bits */
+#define HCI_UART_PROTO_SET	0
+#define HCI_UART_REGISTERED	1
+#define HCI_UART_PROTO_READY	2
+
+/* TX states  */
+#define HCI_UART_SENDING	1
+#define HCI_UART_TX_WAKEUP	2
+
+extern int hci_uart_register_proto(struct hci_uart_proto *p);
+extern int hci_uart_unregister_proto(struct hci_uart_proto *p);
+extern int hci_uart_tx_wakeup(struct hci_uart *hu);
+
+#ifdef CONFIG_BT_HCIUART_H4
+extern int h4_init(void);
+extern int h4_deinit(void);
+#endif
+
+extern int h5_init(void);
+extern int h5_deinit(void);
+
+#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+extern int hci_uart_send_frame(struct sk_buff *skb);
+#else
+extern int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb);
+#endif