Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/holtmann/bluetooth-next-2.6

Documentation/00-INDEX

···
 	- info on the Block I/O (BIO) layer.
 blockdev/
 	- info on block devices & drivers
+btmrvl.txt
+	- info on Marvell Bluetooth driver usage.
 cachetlb.txt
 	- describes the cache/TLB flushing interfaces Linux uses.
 cdrom/

Documentation/btmrvl.txt

···
+=======================================================================
+		README for btmrvl driver
+=======================================================================
+
+
+All commands are used via debugfs interface.
+
+=====================
+Set/get driver configurations:
+
+Path:	/debug/btmrvl/config/
+
+gpiogap=[n]
+hscfgcmd
+	These commands are used to configure the host sleep parameters.
+	bit 8:0  -- Gap
+	bit 16:8 -- GPIO
+
+	where GPIO is the pin number of GPIO used to wake up the host.
+	It could be any valid GPIO pin# (e.g. 0-7) or 0xff (SDIO interface
+	wakeup will be used instead).
+
+	where Gap is the gap in milli seconds between wakeup signal and
+	wakeup event, or 0xff for special host sleep setting.
+
+	Usage:
+		# Use SDIO interface to wake up the host and set GAP to 0x80:
+		echo 0xff80 > /debug/btmrvl/config/gpiogap
+		echo 1 > /debug/btmrvl/config/hscfgcmd
+
+		# Use GPIO pin #3 to wake up the host and set GAP to 0xff:
+		echo 0x03ff >  /debug/btmrvl/config/gpiogap
+		echo 1 > /debug/btmrvl/config/hscfgcmd
+
+psmode=[n]
+pscmd
+	These commands are used to enable/disable auto sleep mode
+
+	where the option is:
+			1 	-- Enable auto sleep mode
+			0 	-- Disable auto sleep mode
+
+	Usage:
+		# Enable auto sleep mode
+		echo 1 > /debug/btmrvl/config/psmode
+		echo 1 > /debug/btmrvl/config/pscmd
+
+		# Disable auto sleep mode
+		echo 0 > /debug/btmrvl/config/psmode
+		echo 1 > /debug/btmrvl/config/pscmd
+
+
+hsmode=[n]
+hscmd
+	These commands are used to enable host sleep or wake up firmware
+
+	where the option is:
+			1	-- Enable host sleep
+			0	-- Wake up firmware
+
+	Usage:
+		# Enable host sleep
+		echo 1 > /debug/btmrvl/config/hsmode
+		echo 1 > /debug/btmrvl/config/hscmd
+
+		# Wake up firmware
+		echo 0 > /debug/btmrvl/config/hsmode
+		echo 1 > /debug/btmrvl/config/hscmd
+
+
+======================
+Get driver status:
+
+Path:	/debug/btmrvl/status/
+
+Usage:
+	cat /debug/btmrvl/status/<args>
+
+where the args are:
+
+curpsmode
+	This command displays current auto sleep status.
+
+psstate
+	This command display the power save state.
+
+hsstate
+	This command display the host sleep state.
+
+txdnldrdy
+	This command displays the value of Tx download ready flag.
+
+
+=====================
+
+Use hcitool to issue raw hci command, refer to hcitool manual
+
+	Usage: Hcitool cmd <ogf> <ocf> [Parameters]
+
+	Interface Control Command
+	hcitool cmd 0x3f 0x5b 0xf5 0x01 0x00    --Enable All interface
+	hcitool cmd 0x3f 0x5b 0xf5 0x01 0x01    --Enable Wlan interface
+	hcitool cmd 0x3f 0x5b 0xf5 0x01 0x02    --Enable BT interface
+	hcitool cmd 0x3f 0x5b 0xf5 0x00 0x00    --Disable All interface
+	hcitool cmd 0x3f 0x5b 0xf5 0x00 0x01    --Disable Wlan interface
+	hcitool cmd 0x3f 0x5b 0xf5 0x00 0x02    --Disable BT interface
+
+=======================================================================
+
+
+SD8688 firmware:
+
+/lib/firmware/sd8688_helper.bin
+/lib/firmware/sd8688.bin
+
+
+The images can be downloaded from:
+
+git.infradead.org/users/dwmw2/linux-firmware.git/libertas/

drivers/bluetooth/Kconfig

···
 	  Say Y here to compile support for virtual HCI devices into the
 	  kernel or say M to compile it as module (hci_vhci).
 
+config BT_MRVL
+	tristate "Marvell Bluetooth driver support"
+	help
+	  The core driver to support Marvell Bluetooth devices.
+
+	  This driver is required if you want to support
+	  Marvell Bluetooth devices, such as 8688.
+
+	  Say Y here to compile Marvell Bluetooth driver
+	  into the kernel or say M to compile it as module.
+
+config BT_MRVL_SDIO
+	tristate "Marvell BT-over-SDIO driver"
+	depends on BT_MRVL && MMC
+	select FW_LOADER
+	help
+	  The driver for Marvell Bluetooth chipsets with SDIO interface.
+
+	  This driver is required if you want to use Marvell Bluetooth
+	  devices with SDIO interface. Currently only SD8688 chipset is
+	  supported.
+
+	  Say Y here to compile support for Marvell BT-over-SDIO driver
+	  into the kernel or say M to compile it as module.
+
 endmenu
 

drivers/bluetooth/Makefile

···
 obj-$(CONFIG_BT_HCIBTUSB)	+= btusb.o
 obj-$(CONFIG_BT_HCIBTSDIO)	+= btsdio.o
 
+obj-$(CONFIG_BT_MRVL)		+= btmrvl.o
+obj-$(CONFIG_BT_MRVL_SDIO)	+= btmrvl_sdio.o
+
+btmrvl-y			:= btmrvl_main.o
+btmrvl-$(CONFIG_DEBUG_FS)	+= btmrvl_debugfs.o
+
 hci_uart-y				:= hci_ldisc.o
 hci_uart-$(CONFIG_BT_HCIUART_H4)	+= hci_h4.o
 hci_uart-$(CONFIG_BT_HCIUART_BCSP)	+= hci_bcsp.o

drivers/bluetooth/btmrvl_debugfs.c

···
+/**
+ * Marvell Bluetooth driver: debugfs related functions
+ *
+ * Copyright (C) 2009, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ **/
+
+#include <linux/debugfs.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "btmrvl_drv.h"
+
+struct btmrvl_debugfs_data {
+	struct dentry *root_dir, *config_dir, *status_dir;
+
+	/* config */
+	struct dentry *drvdbg;
+	struct dentry *psmode;
+	struct dentry *pscmd;
+	struct dentry *hsmode;
+	struct dentry *hscmd;
+	struct dentry *gpiogap;
+	struct dentry *hscfgcmd;
+
+	/* status */
+	struct dentry *curpsmode;
+	struct dentry *hsstate;
+	struct dentry *psstate;
+	struct dentry *txdnldready;
+};
+
+static int btmrvl_open_generic(struct inode *inode, struct file *file)
+{
+	file->private_data = inode->i_private;
+	return 0;
+}
+
+static ssize_t btmrvl_hscfgcmd_write(struct file *file,
+			const char __user *ubuf, size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	long result, ret;
+
+	memset(buf, 0, sizeof(buf));
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	ret = strict_strtol(buf, 10, &result);
+
+	priv->btmrvl_dev.hscfgcmd = result;
+
+	if (priv->btmrvl_dev.hscfgcmd) {
+		btmrvl_prepare_command(priv);
+		wake_up_interruptible(&priv->main_thread.wait_q);
+	}
+
+	return count;
+}
+
+static ssize_t btmrvl_hscfgcmd_read(struct file *file, char __user *userbuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	int ret;
+
+	ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
+						priv->btmrvl_dev.hscfgcmd);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
+}
+
+static const struct file_operations btmrvl_hscfgcmd_fops = {
+	.read	= btmrvl_hscfgcmd_read,
+	.write	= btmrvl_hscfgcmd_write,
+	.open	= btmrvl_open_generic,
+};
+
+static ssize_t btmrvl_psmode_write(struct file *file, const char __user *ubuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	long result, ret;
+
+	memset(buf, 0, sizeof(buf));
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	ret = strict_strtol(buf, 10, &result);
+
+	priv->btmrvl_dev.psmode = result;
+
+	return count;
+}
+
+static ssize_t btmrvl_psmode_read(struct file *file, char __user *userbuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	int ret;
+
+	ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
+						priv->btmrvl_dev.psmode);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
+}
+
+static const struct file_operations btmrvl_psmode_fops = {
+	.read	= btmrvl_psmode_read,
+	.write	= btmrvl_psmode_write,
+	.open	= btmrvl_open_generic,
+};
+
+static ssize_t btmrvl_pscmd_write(struct file *file, const char __user *ubuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	long result, ret;
+
+	memset(buf, 0, sizeof(buf));
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	ret = strict_strtol(buf, 10, &result);
+
+	priv->btmrvl_dev.pscmd = result;
+
+	if (priv->btmrvl_dev.pscmd) {
+		btmrvl_prepare_command(priv);
+		wake_up_interruptible(&priv->main_thread.wait_q);
+	}
+
+	return count;
+
+}
+
+static ssize_t btmrvl_pscmd_read(struct file *file, char __user *userbuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	int ret;
+
+	ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.pscmd);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
+}
+
+static const struct file_operations btmrvl_pscmd_fops = {
+	.read = btmrvl_pscmd_read,
+	.write = btmrvl_pscmd_write,
+	.open = btmrvl_open_generic,
+};
+
+static ssize_t btmrvl_gpiogap_write(struct file *file, const char __user *ubuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	long result, ret;
+
+	memset(buf, 0, sizeof(buf));
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	ret = strict_strtol(buf, 16, &result);
+
+	priv->btmrvl_dev.gpio_gap = result;
+
+	return count;
+}
+
+static ssize_t btmrvl_gpiogap_read(struct file *file, char __user *userbuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	int ret;
+
+	ret = snprintf(buf, sizeof(buf) - 1, "0x%x\n",
+						priv->btmrvl_dev.gpio_gap);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
+}
+
+static const struct file_operations btmrvl_gpiogap_fops = {
+	.read	= btmrvl_gpiogap_read,
+	.write	= btmrvl_gpiogap_write,
+	.open	= btmrvl_open_generic,
+};
+
+static ssize_t btmrvl_hscmd_write(struct file *file, const char __user *ubuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = (struct btmrvl_private *) file->private_data;
+	char buf[16];
+	long result, ret;
+
+	memset(buf, 0, sizeof(buf));
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	ret = strict_strtol(buf, 10, &result);
+
+	priv->btmrvl_dev.hscmd = result;
+	if (priv->btmrvl_dev.hscmd) {
+		btmrvl_prepare_command(priv);
+		wake_up_interruptible(&priv->main_thread.wait_q);
+	}
+
+	return count;
+}
+
+static ssize_t btmrvl_hscmd_read(struct file *file, char __user *userbuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	int ret;
+
+	ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.hscmd);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
+}
+
+static const struct file_operations btmrvl_hscmd_fops = {
+	.read	= btmrvl_hscmd_read,
+	.write	= btmrvl_hscmd_write,
+	.open	= btmrvl_open_generic,
+};
+
+static ssize_t btmrvl_hsmode_write(struct file *file, const char __user *ubuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	long result, ret;
+
+	memset(buf, 0, sizeof(buf));
+
+	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+		return -EFAULT;
+
+	ret = strict_strtol(buf, 10, &result);
+
+	priv->btmrvl_dev.hsmode = result;
+
+	return count;
+}
+
+static ssize_t btmrvl_hsmode_read(struct file *file, char __user * userbuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	int ret;
+
+	ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.hsmode);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
+}
+
+static const struct file_operations btmrvl_hsmode_fops = {
+	.read	= btmrvl_hsmode_read,
+	.write	= btmrvl_hsmode_write,
+	.open	= btmrvl_open_generic,
+};
+
+static ssize_t btmrvl_curpsmode_read(struct file *file, char __user *userbuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	int ret;
+
+	ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->adapter->psmode);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
+}
+
+static const struct file_operations btmrvl_curpsmode_fops = {
+	.read	= btmrvl_curpsmode_read,
+	.open	= btmrvl_open_generic,
+};
+
+static ssize_t btmrvl_psstate_read(struct file *file, char __user * userbuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	int ret;
+
+	ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->adapter->ps_state);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
+}
+
+static const struct file_operations btmrvl_psstate_fops = {
+	.read	= btmrvl_psstate_read,
+	.open	= btmrvl_open_generic,
+};
+
+static ssize_t btmrvl_hsstate_read(struct file *file, char __user *userbuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	int ret;
+
+	ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->adapter->hs_state);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
+}
+
+static const struct file_operations btmrvl_hsstate_fops = {
+	.read	= btmrvl_hsstate_read,
+	.open	= btmrvl_open_generic,
+};
+
+static ssize_t btmrvl_txdnldready_read(struct file *file, char __user *userbuf,
+						size_t count, loff_t *ppos)
+{
+	struct btmrvl_private *priv = file->private_data;
+	char buf[16];
+	int ret;
+
+	ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
+					priv->btmrvl_dev.tx_dnld_rdy);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
+}
+
+static const struct file_operations btmrvl_txdnldready_fops = {
+	.read	= btmrvl_txdnldready_read,
+	.open	= btmrvl_open_generic,
+};
+
+void btmrvl_debugfs_init(struct hci_dev *hdev)
+{
+	struct btmrvl_private *priv = hdev->driver_data;
+	struct btmrvl_debugfs_data *dbg;
+
+	dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
+	priv->debugfs_data = dbg;
+
+	if (!dbg) {
+		BT_ERR("Can not allocate memory for btmrvl_debugfs_data.");
+		return;
+	}
+
+	dbg->root_dir = debugfs_create_dir("btmrvl", NULL);
+
+	dbg->config_dir = debugfs_create_dir("config", dbg->root_dir);
+
+	dbg->psmode = debugfs_create_file("psmode", 0644, dbg->config_dir,
+				hdev->driver_data, &btmrvl_psmode_fops);
+	dbg->pscmd = debugfs_create_file("pscmd", 0644, dbg->config_dir,
+				hdev->driver_data, &btmrvl_pscmd_fops);
+	dbg->gpiogap = debugfs_create_file("gpiogap", 0644, dbg->config_dir,
+				hdev->driver_data, &btmrvl_gpiogap_fops);
+	dbg->hsmode =  debugfs_create_file("hsmode", 0644, dbg->config_dir,
+				hdev->driver_data, &btmrvl_hsmode_fops);
+	dbg->hscmd = debugfs_create_file("hscmd", 0644, dbg->config_dir,
+				hdev->driver_data, &btmrvl_hscmd_fops);
+	dbg->hscfgcmd = debugfs_create_file("hscfgcmd", 0644, dbg->config_dir,
+				hdev->driver_data, &btmrvl_hscfgcmd_fops);
+
+	dbg->status_dir = debugfs_create_dir("status", dbg->root_dir);
+	dbg->curpsmode = debugfs_create_file("curpsmode", 0444,
+						dbg->status_dir,
+						hdev->driver_data,
+						&btmrvl_curpsmode_fops);
+	dbg->psstate = debugfs_create_file("psstate", 0444, dbg->status_dir,
+				hdev->driver_data, &btmrvl_psstate_fops);
+	dbg->hsstate = debugfs_create_file("hsstate", 0444, dbg->status_dir,
+				hdev->driver_data, &btmrvl_hsstate_fops);
+	dbg->txdnldready = debugfs_create_file("txdnldready", 0444,
+						dbg->status_dir,
+						hdev->driver_data,
+						&btmrvl_txdnldready_fops);
+}
+
+void btmrvl_debugfs_remove(struct hci_dev *hdev)
+{
+	struct btmrvl_private *priv = hdev->driver_data;
+	struct btmrvl_debugfs_data *dbg = priv->debugfs_data;
+
+	if (!dbg)
+		return;
+
+	debugfs_remove(dbg->psmode);
+	debugfs_remove(dbg->pscmd);
+	debugfs_remove(dbg->gpiogap);
+	debugfs_remove(dbg->hsmode);
+	debugfs_remove(dbg->hscmd);
+	debugfs_remove(dbg->hscfgcmd);
+	debugfs_remove(dbg->config_dir);
+
+	debugfs_remove(dbg->curpsmode);
+	debugfs_remove(dbg->psstate);
+	debugfs_remove(dbg->hsstate);
+	debugfs_remove(dbg->txdnldready);
+	debugfs_remove(dbg->status_dir);
+
+	debugfs_remove(dbg->root_dir);
+
+	kfree(dbg);
+}

drivers/bluetooth/btmrvl_drv.h

···
+/*
+ * Marvell Bluetooth driver: global definitions & declarations
+ *
+ * Copyright (C) 2009, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ *
+ */
+
+#include <linux/kthread.h>
+#include <linux/bitops.h>
+#include <net/bluetooth/bluetooth.h>
+
+#define BTM_HEADER_LEN			4
+#define BTM_UPLD_SIZE			2312
+
+/* Time to wait until Host Sleep state change in millisecond */
+#define WAIT_UNTIL_HS_STATE_CHANGED	5000
+/* Time to wait for command response in millisecond */
+#define WAIT_UNTIL_CMD_RESP		5000
+
+struct btmrvl_thread {
+	struct task_struct *task;
+	wait_queue_head_t wait_q;
+	void *priv;
+};
+
+struct btmrvl_device {
+	void *card;
+	struct hci_dev *hcidev;
+
+	u8 tx_dnld_rdy;
+
+	u8 psmode;
+	u8 pscmd;
+	u8 hsmode;
+	u8 hscmd;
+
+	/* Low byte is gap, high byte is GPIO */
+	u16 gpio_gap;
+
+	u8 hscfgcmd;
+	u8 sendcmdflag;
+};
+
+struct btmrvl_adapter {
+	u32 int_count;
+	struct sk_buff_head tx_queue;
+	u8 psmode;
+	u8 ps_state;
+	u8 hs_state;
+	u8 wakeup_tries;
+	wait_queue_head_t cmd_wait_q;
+	u8 cmd_complete;
+};
+
+struct btmrvl_private {
+	struct btmrvl_device btmrvl_dev;
+	struct btmrvl_adapter *adapter;
+	struct btmrvl_thread main_thread;
+	int (*hw_host_to_card) (struct btmrvl_private *priv,
+				u8 *payload, u16 nb);
+	int (*hw_wakeup_firmware) (struct btmrvl_private *priv);
+	spinlock_t driver_lock;		/* spinlock used by driver */
+#ifdef CONFIG_DEBUG_FS
+	void *debugfs_data;
+#endif
+};
+
+#define MRVL_VENDOR_PKT			0xFE
+
+/* Bluetooth commands  */
+#define BT_CMD_AUTO_SLEEP_MODE		0x23
+#define BT_CMD_HOST_SLEEP_CONFIG	0x59
+#define BT_CMD_HOST_SLEEP_ENABLE	0x5A
+#define BT_CMD_MODULE_CFG_REQ		0x5B
+
+/* Sub-commands: Module Bringup/Shutdown Request */
+#define MODULE_BRINGUP_REQ		0xF1
+#define MODULE_SHUTDOWN_REQ		0xF2
+
+#define BT_EVENT_POWER_STATE		0x20
+
+/* Bluetooth Power States */
+#define BT_PS_ENABLE			0x02
+#define BT_PS_DISABLE			0x03
+#define BT_PS_SLEEP			0x01
+
+#define OGF				0x3F
+
+/* Host Sleep states */
+#define HS_ACTIVATED			0x01
+#define HS_DEACTIVATED			0x00
+
+/* Power Save modes */
+#define PS_SLEEP			0x01
+#define PS_AWAKE			0x00
+
+struct btmrvl_cmd {
+	__le16 ocf_ogf;
+	u8 length;
+	u8 data[4];
+} __attribute__ ((packed));
+
+struct btmrvl_event {
+	u8 ec;		/* event counter */
+	u8 length;
+	u8 data[4];
+} __attribute__ ((packed));
+
+/* Prototype of global function */
+
+struct btmrvl_private *btmrvl_add_card(void *card);
+int btmrvl_remove_card(struct btmrvl_private *priv);
+
+void btmrvl_interrupt(struct btmrvl_private *priv);
+
+void btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb);
+int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb);
+
+int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd);
+int btmrvl_prepare_command(struct btmrvl_private *priv);
+
+#ifdef CONFIG_DEBUG_FS
+void btmrvl_debugfs_init(struct hci_dev *hdev);
+void btmrvl_debugfs_remove(struct hci_dev *hdev);
+#endif

drivers/bluetooth/btmrvl_main.c

···
+/**
+ * Marvell Bluetooth driver
+ *
+ * Copyright (C) 2009, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ **/
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "btmrvl_drv.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++;
+
+	wake_up_interruptible(&priv->main_thread.wait_q);
+}
+EXPORT_SYMBOL_GPL(btmrvl_interrupt);
+
+void btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
+{
+	struct hci_event_hdr *hdr = (void *) skb->data;
+	struct hci_ev_cmd_complete *ec;
+	u16 opcode, ocf;
+
+	if (hdr->evt == HCI_EV_CMD_COMPLETE) {
+		ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
+		opcode = __le16_to_cpu(ec->opcode);
+		ocf = hci_opcode_ocf(opcode);
+		if (ocf == BT_CMD_MODULE_CFG_REQ &&
+					priv->btmrvl_dev.sendcmdflag) {
+			priv->btmrvl_dev.sendcmdflag = false;
+			priv->adapter->cmd_complete = true;
+			wake_up_interruptible(&priv->adapter->cmd_wait_q);
+		}
+	}
+}
+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;
+	u8 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_CMD_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_CMD_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_CMD_HOST_SLEEP_ENABLE:
+		if (!event->data[1]) {
+			adapter->hs_state = HS_ACTIVATED;
+			if (adapter->psmode)
+				adapter->ps_state = PS_SLEEP;
+			wake_up_interruptible(&adapter->cmd_wait_q);
+			BT_DBG("HS ACTIVATED!");
+		} else {
+			BT_DBG("HS Enable failed");
+		}
+		break;
+
+	case BT_CMD_MODULE_CFG_REQ:
+		if (priv->btmrvl_dev.sendcmdflag &&
+				event->data[1] == MODULE_BRINGUP_REQ) {
+			BT_DBG("EVENT:%s", (event->data[2]) ?
+				"Bring-up failed" : "Bring-up succeed");
+		} 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);
+
+int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd)
+{
+	struct sk_buff *skb;
+	struct btmrvl_cmd *cmd;
+	int ret = 0;
+
+	skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
+	if (skb == NULL) {
+		BT_ERR("No free skb");
+		return -ENOMEM;
+	}
+
+	cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
+	cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_MODULE_CFG_REQ));
+	cmd->length = 1;
+	cmd->data[0] = subcmd;
+
+	bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
+
+	skb->dev = (void *) priv->btmrvl_dev.hcidev;
+	skb_queue_head(&priv->adapter->tx_queue, skb);
+
+	priv->btmrvl_dev.sendcmdflag = true;
+
+	priv->adapter->cmd_complete = false;
+
+	BT_DBG("Queue module cfg Command");
+
+	wake_up_interruptible(&priv->main_thread.wait_q);
+
+	if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
+				priv->adapter->cmd_complete,
+				msecs_to_jiffies(WAIT_UNTIL_CMD_RESP))) {
+		ret = -ETIMEDOUT;
+		BT_ERR("module_cfg_cmd(%x): timeout: %d",
+					subcmd, priv->btmrvl_dev.sendcmdflag);
+	}
+
+	BT_DBG("module cfg Command done");
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
+
+static int btmrvl_enable_hs(struct btmrvl_private *priv)
+{
+	struct sk_buff *skb;
+	struct btmrvl_cmd *cmd;
+	int ret = 0;
+
+	skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
+	if (skb == NULL) {
+		BT_ERR("No free skb");
+		return -ENOMEM;
+	}
+
+	cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
+	cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_ENABLE));
+	cmd->length = 0;
+
+	bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
+
+	skb->dev = (void *) priv->btmrvl_dev.hcidev;
+	skb_queue_head(&priv->adapter->tx_queue, skb);
+
+	BT_DBG("Queue hs enable Command");
+
+	wake_up_interruptible(&priv->main_thread.wait_q);
+
+	if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
+			priv->adapter->hs_state,
+			msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED))) {
+		ret = -ETIMEDOUT;
+		BT_ERR("timeout: %d, %d,%d", priv->adapter->hs_state,
+						priv->adapter->ps_state,
+						priv->adapter->wakeup_tries);
+	}
+
+	return ret;
+}
+
+int btmrvl_prepare_command(struct btmrvl_private *priv)
+{
+	struct sk_buff *skb = NULL;
+	struct btmrvl_cmd *cmd;
+	int ret = 0;
+
+	if (priv->btmrvl_dev.hscfgcmd) {
+		priv->btmrvl_dev.hscfgcmd = 0;
+
+		skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
+		if (skb == NULL) {
+			BT_ERR("No free skb");
+			return -ENOMEM;
+		}
+
+		cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
+		cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_CONFIG));
+		cmd->length = 2;
+		cmd->data[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
+		cmd->data[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
+
+		bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
+
+		skb->dev = (void *) priv->btmrvl_dev.hcidev;
+		skb_queue_head(&priv->adapter->tx_queue, skb);
+
+		BT_DBG("Queue HSCFG Command, gpio=0x%x, gap=0x%x",
+						cmd->data[0], cmd->data[1]);
+	}
+
+	if (priv->btmrvl_dev.pscmd) {
+		priv->btmrvl_dev.pscmd = 0;
+
+		skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
+		if (skb == NULL) {
+			BT_ERR("No free skb");
+			return -ENOMEM;
+		}
+
+		cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
+		cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_AUTO_SLEEP_MODE));
+		cmd->length = 1;
+
+		if (priv->btmrvl_dev.psmode)
+			cmd->data[0] = BT_PS_ENABLE;
+		else
+			cmd->data[0] = BT_PS_DISABLE;
+
+		bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
+
+		skb->dev = (void *) priv->btmrvl_dev.hcidev;
+		skb_queue_head(&priv->adapter->tx_queue, skb);
+
+		BT_DBG("Queue PSMODE Command:%d", cmd->data[0]);
+	}
+
+	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;
+		}
+	}
+
+	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;
+	}
+
+	if (skb_headroom(skb) < BTM_HEADER_LEN) {
+		struct sk_buff *tmp = skb;
+
+		skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
+		if (!skb) {
+			BT_ERR("Tx Error: realloc_headroom failed %d",
+				BTM_HEADER_LEN);
+			skb = tmp;
+			return -EINVAL;
+		}
+
+		kfree_skb(tmp);
+	}
+
+	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] = bt_cb(skb)->pkt_type;
+
+	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)
+{
+	skb_queue_head_init(&priv->adapter->tx_queue);
+
+	priv->adapter->ps_state = PS_AWAKE;
+
+	init_waitqueue_head(&priv->adapter->cmd_wait_q);
+}
+
+static void btmrvl_free_adapter(struct btmrvl_private *priv)
+{
+	skb_queue_purge(&priv->adapter->tx_queue);
+
+	kfree(priv->adapter);
+
+	priv->adapter = NULL;
+}
+
+static int btmrvl_ioctl(struct hci_dev *hdev,
+				unsigned int cmd, unsigned long arg)
+{
+	return -ENOIOCTLCMD;
+}
+
+static void btmrvl_destruct(struct hci_dev *hdev)
+{
+}
+
+static int btmrvl_send_frame(struct sk_buff *skb)
+{
+	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
+	struct btmrvl_private *priv = NULL;
+
+	BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);
+
+	if (!hdev || !hdev->driver_data) {
+		BT_ERR("Frame for unknown HCI device");
+		return -ENODEV;
+	}
+
+	priv = (struct btmrvl_private *) hdev->driver_data;
+	if (!test_bit(HCI_RUNNING, &hdev->flags)) {
+		BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
+		print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
+							skb->data, skb->len);
+		return -EBUSY;
+	}
+
+	switch (bt_cb(skb)->pkt_type) {
+	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);
+
+	wake_up_interruptible(&priv->main_thread.wait_q);
+
+	return 0;
+}
+
+static int btmrvl_flush(struct hci_dev *hdev)
+{
+	struct btmrvl_private *priv = hdev->driver_data;
+
+	skb_queue_purge(&priv->adapter->tx_queue);
+
+	return 0;
+}
+
+static int btmrvl_close(struct hci_dev *hdev)
+{
+	struct btmrvl_private *priv = hdev->driver_data;
+
+	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
+		return 0;
+
+	skb_queue_purge(&priv->adapter->tx_queue);
+
+	return 0;
+}
+
+static int btmrvl_open(struct hci_dev *hdev)
+{
+	set_bit(HCI_RUNNING, &hdev->flags);
+
+	return 0;
+}
+
+/*
+ * 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_t wait;
+	struct sk_buff *skb;
+	ulong flags;
+
+	init_waitqueue_entry(&wait, current);
+
+	current->flags |= PF_NOFREEZE;
+
+	for (;;) {
+		add_wait_queue(&thread->wait_q, &wait);
+
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		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()) {
+			BT_DBG("main_thread: break from main thread");
+			break;
+		}
+
+		spin_lock_irqsave(&priv->driver_lock, flags);
+		if (adapter->int_count) {
+			adapter->int_count = 0;
+		} 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;
+		}
+		spin_unlock_irqrestore(&priv->driver_lock, flags);
+
+		if (adapter->ps_state == PS_SLEEP)
+			continue;
+
+		if (!priv->btmrvl_dev.tx_dnld_rdy)
+			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;
+}
+
+struct btmrvl_private *btmrvl_add_card(void *card)
+{
+	struct hci_dev *hdev = NULL;
+	struct btmrvl_private *priv;
+	int ret;
+
+	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);
+
+	hdev = hci_alloc_dev();
+	if (!hdev) {
+		BT_ERR("Can not allocate HCI device");
+		goto err_hdev;
+	}
+
+	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");
+
+	priv->btmrvl_dev.hcidev = hdev;
+	priv->btmrvl_dev.card = card;
+
+	hdev->driver_data = priv;
+
+	priv->btmrvl_dev.tx_dnld_rdy = true;
+
+	hdev->type = HCI_SDIO;
+	hdev->open = btmrvl_open;
+	hdev->close = btmrvl_close;
+	hdev->flush = btmrvl_flush;
+	hdev->send = btmrvl_send_frame;
+	hdev->destruct = btmrvl_destruct;
+	hdev->ioctl = btmrvl_ioctl;
+	hdev->owner = THIS_MODULE;
+
+	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 priv;
+
+err_hci_register_dev:
+	/* Stop the thread servicing the interrupts */
+	kthread_stop(priv->main_thread.task);
+
+	hci_free_dev(hdev);
+
+err_hdev:
+	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);
+
+	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");

drivers/bluetooth/btmrvl_sdio.c

···
+/**
+ * Marvell BT-over-SDIO driver: SDIO interface related functions.
+ *
+ * Copyright (C) 2009, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ **/
+
+#include <linux/firmware.h>
+
+#include <linux/mmc/sdio_ids.h>
+#include <linux/mmc/sdio_func.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "btmrvl_drv.h"
+#include "btmrvl_sdio.h"
+
+#define VERSION "1.0"
+
+/* The btmrvl_sdio_remove() callback function is called
+ * when user removes this module from kernel space or ejects
+ * the card from the slot. The driver handles these 2 cases
+ * differently.
+ * If the user is removing the module, a MODULE_SHUTDOWN_REQ
+ * command is sent to firmware and interrupt will be disabled.
+ * If the card is removed, there is no need to send command
+ * or disable interrupt.
+ *
+ * The variable 'user_rmmod' is used to distinguish these two
+ * scenarios. This flag is initialized as FALSE in case the card
+ * is removed, and will be set to TRUE for module removal when
+ * module_exit function is called.
+ */
+static u8 user_rmmod;
+
+static const struct btmrvl_sdio_device btmrvl_sdio_sd6888 = {
+	.helper		= "sd8688_helper.bin",
+	.firmware	= "sd8688.bin",
+};
+
+static const struct sdio_device_id btmrvl_sdio_ids[] = {
+	/* Marvell SD8688 Bluetooth device */
+	{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
+			.driver_data = (unsigned long) &btmrvl_sdio_sd6888 },
+
+	{ }	/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
+
+static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
+{
+	u8 reg;
+	int ret;
+
+	reg = sdio_readb(card->func, CARD_RX_UNIT_REG, &ret);
+	if (!ret)
+		card->rx_unit = reg;
+
+	return ret;
+}
+
+static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
+{
+	u8 fws0, fws1;
+	int ret;
+
+	*dat = 0;
+
+	fws0 = sdio_readb(card->func, CARD_FW_STATUS0_REG, &ret);
+
+	if (!ret)
+		fws1 = sdio_readb(card->func, CARD_FW_STATUS1_REG, &ret);
+
+	if (ret)
+		return -EIO;
+
+	*dat = (((u16) fws1) << 8) | fws0;
+
+	return 0;
+}
+
+static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
+{
+	u8 reg;
+	int ret;
+
+	reg = sdio_readb(card->func, CARD_RX_LEN_REG, &ret);
+	if (!ret)
+		*dat = (u16) reg << card->rx_unit;
+
+	return ret;
+}
+
+static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
+								u8 mask)
+{
+	int ret;
+
+	sdio_writeb(card->func, mask, HOST_INT_MASK_REG, &ret);
+	if (ret) {
+		BT_ERR("Unable to enable the host interrupt!");
+		ret = -EIO;
+	}
+
+	return ret;
+}
+
+static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
+								u8 mask)
+{
+	u8 host_int_mask;
+	int ret;
+
+	host_int_mask = sdio_readb(card->func, HOST_INT_MASK_REG, &ret);
+	if (ret)
+		return -EIO;
+
+	host_int_mask &= ~mask;
+
+	sdio_writeb(card->func, host_int_mask, HOST_INT_MASK_REG, &ret);
+	if (ret < 0) {
+		BT_ERR("Unable to disable the host interrupt!");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
+{
+	unsigned int tries;
+	u8 status;
+	int ret;
+
+	for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
+		status = sdio_readb(card->func, CARD_STATUS_REG, &ret);
+		if (ret)
+			goto failed;
+		if ((status & bits) == bits)
+			return ret;
+
+		udelay(1);
+	}
+
+	ret = -ETIMEDOUT;
+
+failed:
+	BT_ERR("FAILED! ret=%d", ret);
+
+	return ret;
+}
+
+static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
+								int pollnum)
+{
+	int ret = -ETIMEDOUT;
+	u16 firmwarestat;
+	unsigned int tries;
+
+	 /* Wait for firmware to become ready */
+	for (tries = 0; tries < pollnum; tries++) {
+		if (btmrvl_sdio_read_fw_status(card, &firmwarestat) < 0)
+			continue;
+
+		if (firmwarestat == FIRMWARE_READY) {
+			ret = 0;
+			break;
+		} else {
+			msleep(10);
+		}
+	}
+
+	return ret;
+}
+
+static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
+{
+	const struct firmware *fw_helper = NULL;
+	const u8 *helper = NULL;
+	int ret;
+	void *tmphlprbuf = NULL;
+	int tmphlprbufsz, hlprblknow, helperlen;
+	u8 *helperbuf;
+	u32 tx_len;
+
+	ret = request_firmware(&fw_helper, card->helper,
+						&card->func->dev);
+	if ((ret < 0) || !fw_helper) {
+		BT_ERR("request_firmware(helper) failed, error code = %d",
+									ret);
+		ret = -ENOENT;
+		goto done;
+	}
+
+	helper = fw_helper->data;
+	helperlen = fw_helper->size;
+
+	BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
+						helperlen, SDIO_BLOCK_SIZE);
+
+	tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
+
+	tmphlprbuf = kmalloc(tmphlprbufsz, GFP_KERNEL);
+	if (!tmphlprbuf) {
+		BT_ERR("Unable to allocate buffer for helper."
+			" Terminating download");
+		ret = -ENOMEM;
+		goto done;
+	}
+
+	memset(tmphlprbuf, 0, tmphlprbufsz);
+
+	helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
+
+	/* Perform helper data transfer */
+	tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
+			- SDIO_HEADER_LEN;
+	hlprblknow = 0;
+
+	do {
+		ret = btmrvl_sdio_poll_card_status(card,
+					    CARD_IO_READY | DN_LD_CARD_RDY);
+		if (ret < 0) {
+			BT_ERR("Helper download poll status timeout @ %d",
+				hlprblknow);
+			goto done;
+		}
+
+		/* Check if there is more data? */
+		if (hlprblknow >= helperlen)
+			break;
+
+		if (helperlen - hlprblknow < tx_len)
+			tx_len = helperlen - hlprblknow;
+
+		/* Little-endian */
+		helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
+		helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
+		helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
+		helperbuf[3] = ((tx_len & 0xff000000) >> 24);
+
+		memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
+				tx_len);
+
+		/* Now send the data */
+		ret = sdio_writesb(card->func, card->ioport, helperbuf,
+				FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
+		if (ret < 0) {
+			BT_ERR("IO error during helper download @ %d",
+				hlprblknow);
+			goto done;
+		}
+
+		hlprblknow += tx_len;
+	} while (true);
+
+	BT_DBG("Transferring helper image EOF block");
+
+	memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
+
+	ret = sdio_writesb(card->func, card->ioport, helperbuf,
+							SDIO_BLOCK_SIZE);
+	if (ret < 0) {
+		BT_ERR("IO error in writing helper image EOF block");
+		goto done;
+	}
+
+	ret = 0;
+
+done:
+	kfree(tmphlprbuf);
+	if (fw_helper)
+		release_firmware(fw_helper);
+
+	return ret;
+}
+
+static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
+{
+	const struct firmware *fw_firmware = NULL;
+	const u8 *firmware = NULL;
+	int firmwarelen, tmpfwbufsz, ret;
+	unsigned int tries, offset;
+	u8 base0, base1;
+	void *tmpfwbuf = NULL;
+	u8 *fwbuf;
+	u16 len;
+	int txlen = 0, tx_blocks = 0, count = 0;
+
+	ret = request_firmware(&fw_firmware, card->firmware,
+							&card->func->dev);
+	if ((ret < 0) || !fw_firmware) {
+		BT_ERR("request_firmware(firmware) failed, error code = %d",
+									ret);
+		ret = -ENOENT;
+		goto done;
+	}
+
+	firmware = fw_firmware->data;
+	firmwarelen = fw_firmware->size;
+
+	BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
+
+	tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
+	tmpfwbuf = kmalloc(tmpfwbufsz, GFP_KERNEL);
+	if (!tmpfwbuf) {
+		BT_ERR("Unable to allocate buffer for firmware."
+		       " Terminating download");
+		ret = -ENOMEM;
+		goto done;
+	}
+
+	memset(tmpfwbuf, 0, tmpfwbufsz);
+
+	/* Ensure aligned firmware buffer */
+	fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
+
+	/* Perform firmware data transfer */
+	offset = 0;
+	do {
+		ret = btmrvl_sdio_poll_card_status(card,
+					CARD_IO_READY | DN_LD_CARD_RDY);
+		if (ret < 0) {
+			BT_ERR("FW download with helper poll status"
+						" timeout @ %d", offset);
+			goto done;
+		}
+
+		/* Check if there is more data ? */
+		if (offset >= firmwarelen)
+			break;
+
+		for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
+			base0 = sdio_readb(card->func,
+					SQ_READ_BASE_ADDRESS_A0_REG, &ret);
+			if (ret) {
+				BT_ERR("BASE0 register read failed:"
+					" base0 = 0x%04X(%d)."
+					" Terminating download",
+					base0, base0);
+				ret = -EIO;
+				goto done;
+			}
+			base1 = sdio_readb(card->func,
+					SQ_READ_BASE_ADDRESS_A1_REG, &ret);
+			if (ret) {
+				BT_ERR("BASE1 register read failed:"
+					" base1 = 0x%04X(%d)."
+					" Terminating download",
+					base1, base1);
+				ret = -EIO;
+				goto done;
+			}
+
+			len = (((u16) base1) << 8) | base0;
+			if (len)
+				break;
+
+			udelay(10);
+		}
+
+		if (!len)
+			break;
+		else if (len > BTM_UPLD_SIZE) {
+			BT_ERR("FW download failure @%d, invalid length %d",
+								offset, len);
+			ret = -EINVAL;
+			goto done;
+		}
+
+		txlen = len;
+
+		if (len & BIT(0)) {
+			count++;
+			if (count > MAX_WRITE_IOMEM_RETRY) {
+				BT_ERR("FW download failure @%d, "
+					"over max retry count", offset);
+				ret = -EIO;
+				goto done;
+			}
+			BT_ERR("FW CRC error indicated by the helper: "
+				"len = 0x%04X, txlen = %d", len, txlen);
+			len &= ~BIT(0);
+			/* Set txlen to 0 so as to resend from same offset */
+			txlen = 0;
+		} else {
+			count = 0;
+
+			/* Last block ? */
+			if (firmwarelen - offset < txlen)
+				txlen = firmwarelen - offset;
+
+			tx_blocks =
+			    (txlen + SDIO_BLOCK_SIZE - 1) / SDIO_BLOCK_SIZE;
+
+			memcpy(fwbuf, &firmware[offset], txlen);
+		}
+
+		ret = sdio_writesb(card->func, card->ioport, fwbuf,
+					tx_blocks * SDIO_BLOCK_SIZE);
+
+		if (ret < 0) {
+			BT_ERR("FW download, writesb(%d) failed @%d",
+							count, offset);
+			sdio_writeb(card->func, HOST_CMD53_FIN, CONFIG_REG,
+									&ret);
+			if (ret)
+				BT_ERR("writeb failed (CFG)");
+		}
+
+		offset += txlen;
+	} while (true);
+
+	BT_DBG("FW download over, size %d bytes", offset);
+
+	ret = 0;
+
+done:
+	kfree(tmpfwbuf);
+
+	if (fw_firmware)
+		release_firmware(fw_firmware);
+
+	return ret;
+}
+
+static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
+{
+	u16 buf_len = 0;
+	int ret, buf_block_len, blksz;
+	struct sk_buff *skb = NULL;
+	u32 type;
+	u8 *payload = NULL;
+	struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
+	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
+
+	if (!card || !card->func) {
+		BT_ERR("card or function is NULL!");
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	/* Read the length of data to be transferred */
+	ret = btmrvl_sdio_read_rx_len(card, &buf_len);
+	if (ret < 0) {
+		BT_ERR("read rx_len failed");
+		ret = -EIO;
+		goto exit;
+	}
+
+	blksz = SDIO_BLOCK_SIZE;
+	buf_block_len = (buf_len + blksz - 1) / blksz;
+
+	if (buf_len <= SDIO_HEADER_LEN
+			|| (buf_block_len * blksz) > ALLOC_BUF_SIZE) {
+		BT_ERR("invalid packet length: %d", buf_len);
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	/* Allocate buffer */
+	skb = bt_skb_alloc(buf_block_len * blksz + BTSDIO_DMA_ALIGN,
+								GFP_ATOMIC);
+	if (skb == NULL) {
+		BT_ERR("No free skb");
+		goto exit;
+	}
+
+	if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
+		skb_put(skb, (unsigned long) skb->data &
+					(BTSDIO_DMA_ALIGN - 1));
+		skb_pull(skb, (unsigned long) skb->data &
+					(BTSDIO_DMA_ALIGN - 1));
+	}
+
+	payload = skb->data;
+
+	ret = sdio_readsb(card->func, payload, card->ioport,
+			  buf_block_len * blksz);
+	if (ret < 0) {
+		BT_ERR("readsb failed: %d", ret);
+		ret = -EIO;
+		goto exit;
+	}
+
+	/* This is SDIO specific header length: byte[2][1][0], type: byte[3]
+	 * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
+	 */
+
+	buf_len = payload[0];
+	buf_len |= (u16) payload[1] << 8;
+	type = payload[3];
+
+	switch (type) {
+	case HCI_ACLDATA_PKT:
+	case HCI_SCODATA_PKT:
+	case HCI_EVENT_PKT:
+		bt_cb(skb)->pkt_type = type;
+		skb->dev = (void *)hdev;
+		skb_put(skb, buf_len);
+		skb_pull(skb, SDIO_HEADER_LEN);
+
+		if (type == HCI_EVENT_PKT)
+			btmrvl_check_evtpkt(priv, skb);
+
+		hci_recv_frame(skb);
+		hdev->stat.byte_rx += buf_len;
+		break;
+
+	case MRVL_VENDOR_PKT:
+		bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
+		skb->dev = (void *)hdev;
+		skb_put(skb, buf_len);
+		skb_pull(skb, SDIO_HEADER_LEN);
+
+		if (btmrvl_process_event(priv, skb))
+			hci_recv_frame(skb);
+
+		hdev->stat.byte_rx += buf_len;
+		break;
+
+	default:
+		BT_ERR("Unknow packet type:%d", type);
+		print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, payload,
+						blksz * buf_block_len);
+
+		kfree_skb(skb);
+		skb = NULL;
+		break;
+	}
+
+exit:
+	if (ret) {
+		hdev->stat.err_rx++;
+		if (skb)
+			kfree_skb(skb);
+	}
+
+	return ret;
+}
+
+static int btmrvl_sdio_get_int_status(struct btmrvl_private *priv, u8 * ireg)
+{
+	int ret;
+	u8 sdio_ireg = 0;
+	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
+
+	*ireg = 0;
+
+	sdio_ireg = sdio_readb(card->func, HOST_INTSTATUS_REG, &ret);
+	if (ret) {
+		BT_ERR("sdio_readb: read int status register failed");
+		ret = -EIO;
+		goto done;
+	}
+
+	if (sdio_ireg != 0) {
+		/*
+		 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
+		 * Clear the interrupt status register and re-enable the
+		 * interrupt.
+		 */
+		BT_DBG("sdio_ireg = 0x%x", sdio_ireg);
+
+		sdio_writeb(card->func, ~(sdio_ireg) & (DN_LD_HOST_INT_STATUS |
+							UP_LD_HOST_INT_STATUS),
+			    HOST_INTSTATUS_REG, &ret);
+		if (ret) {
+			BT_ERR("sdio_writeb: clear int status register "
+				"failed");
+			ret = -EIO;
+			goto done;
+		}
+	}
+
+	if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
+		if (priv->btmrvl_dev.tx_dnld_rdy)
+			BT_DBG("tx_done already received: "
+				" int_status=0x%x", sdio_ireg);
+		else
+			priv->btmrvl_dev.tx_dnld_rdy = true;
+	}
+
+	if (sdio_ireg & UP_LD_HOST_INT_STATUS)
+		btmrvl_sdio_card_to_host(priv);
+
+	*ireg = sdio_ireg;
+
+	ret = 0;
+
+done:
+	return ret;
+}
+
+static void btmrvl_sdio_interrupt(struct sdio_func *func)
+{
+	struct btmrvl_private *priv;
+	struct hci_dev *hcidev;
+	struct btmrvl_sdio_card *card;
+	u8 ireg = 0;
+
+	card = sdio_get_drvdata(func);
+	if (card && card->priv) {
+		priv = card->priv;
+		hcidev = priv->btmrvl_dev.hcidev;
+
+		if (btmrvl_sdio_get_int_status(priv, &ireg))
+			BT_ERR("reading HOST_INT_STATUS_REG failed");
+		else
+			BT_DBG("HOST_INT_STATUS_REG %#x", ireg);
+
+		btmrvl_interrupt(priv);
+	}
+}
+
+static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
+{
+	struct sdio_func *func;
+	u8 reg;
+	int ret = 0;
+
+	if (!card || !card->func) {
+		BT_ERR("Error: card or function is NULL!");
+		ret = -EINVAL;
+		goto failed;
+	}
+
+	func = card->func;
+
+	sdio_claim_host(func);
+
+	ret = sdio_enable_func(func);
+	if (ret) {
+		BT_ERR("sdio_enable_func() failed: ret=%d", ret);
+		ret = -EIO;
+		goto release_host;
+	}
+
+	ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
+	if (ret) {
+		BT_ERR("sdio_claim_irq failed: ret=%d", ret);
+		ret = -EIO;
+		goto disable_func;
+	}
+
+	ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
+	if (ret) {
+		BT_ERR("cannot set SDIO block size");
+		ret = -EIO;
+		goto release_irq;
+	}
+
+	reg = sdio_readb(func, IO_PORT_0_REG, &ret);
+	if (ret < 0) {
+		ret = -EIO;
+		goto release_irq;
+	}
+
+	card->ioport = reg;
+
+	reg = sdio_readb(func, IO_PORT_1_REG, &ret);
+	if (ret < 0) {
+		ret = -EIO;
+		goto release_irq;
+	}
+
+	card->ioport |= (reg << 8);
+
+	reg = sdio_readb(func, IO_PORT_2_REG, &ret);
+	if (ret < 0) {
+		ret = -EIO;
+		goto release_irq;
+	}
+
+	card->ioport |= (reg << 16);
+
+	BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
+
+	sdio_set_drvdata(func, card);
+
+	sdio_release_host(func);
+
+	return 0;
+
+release_irq:
+	sdio_release_irq(func);
+
+disable_func:
+	sdio_disable_func(func);
+
+release_host:
+	sdio_release_host(func);
+
+failed:
+	return ret;
+}
+
+static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
+{
+	if (card && card->func) {
+		sdio_claim_host(card->func);
+		sdio_release_irq(card->func);
+		sdio_disable_func(card->func);
+		sdio_release_host(card->func);
+		sdio_set_drvdata(card->func, NULL);
+	}
+
+	return 0;
+}
+
+static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
+{
+	int ret;
+
+	if (!card || !card->func)
+		return -EINVAL;
+
+	sdio_claim_host(card->func);
+
+	ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
+
+	btmrvl_sdio_get_rx_unit(card);
+
+	sdio_release_host(card->func);
+
+	return ret;
+}
+
+static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
+{
+	int ret;
+
+	if (!card || !card->func)
+		return -EINVAL;
+
+	sdio_claim_host(card->func);
+
+	ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
+
+	sdio_release_host(card->func);
+
+	return ret;
+}
+
+static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
+				u8 *payload, u16 nb)
+{
+	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
+	int ret = 0;
+	int buf_block_len;
+	int blksz;
+	int i = 0;
+	u8 *buf = NULL;
+	void *tmpbuf = NULL;
+	int tmpbufsz;
+
+	if (!card || !card->func) {
+		BT_ERR("card or function is NULL!");
+		return -EINVAL;
+	}
+
+	buf = payload;
+	if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
+		tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
+		tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
+		if (!tmpbuf)
+			return -ENOMEM;
+		buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
+		memcpy(buf, payload, nb);
+	}
+
+	blksz = SDIO_BLOCK_SIZE;
+	buf_block_len = (nb + blksz - 1) / blksz;
+
+	sdio_claim_host(card->func);
+
+	do {
+		/* Transfer data to card */
+		ret = sdio_writesb(card->func, card->ioport, buf,
+				   buf_block_len * blksz);
+		if (ret < 0) {
+			i++;
+			BT_ERR("i=%d writesb failed: %d", i, ret);
+			print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
+						payload, nb);
+			ret = -EIO;
+			if (i > MAX_WRITE_IOMEM_RETRY)
+				goto exit;
+		}
+	} while (ret);
+
+	priv->btmrvl_dev.tx_dnld_rdy = false;
+
+exit:
+	sdio_release_host(card->func);
+
+	return ret;
+}
+
+static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
+{
+	int ret = 0;
+
+	if (!card || !card->func) {
+		BT_ERR("card or function is NULL!");
+		return -EINVAL;
+	}
+	sdio_claim_host(card->func);
+
+	if (!btmrvl_sdio_verify_fw_download(card, 1)) {
+		BT_DBG("Firmware already downloaded!");
+		goto done;
+	}
+
+	ret = btmrvl_sdio_download_helper(card);
+	if (ret) {
+		BT_ERR("Failed to download helper!");
+		ret = -EIO;
+		goto done;
+	}
+
+	if (btmrvl_sdio_download_fw_w_helper(card)) {
+		BT_ERR("Failed to download firmware!");
+		ret = -EIO;
+		goto done;
+	}
+
+	if (btmrvl_sdio_verify_fw_download(card, MAX_POLL_TRIES)) {
+		BT_ERR("FW failed to be active in time!");
+		ret = -ETIMEDOUT;
+		goto done;
+	}
+
+done:
+	sdio_release_host(card->func);
+
+	return ret;
+}
+
+static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
+{
+	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
+	int ret = 0;
+
+	if (!card || !card->func) {
+		BT_ERR("card or function is NULL!");
+		return -EINVAL;
+	}
+
+	sdio_claim_host(card->func);
+
+	sdio_writeb(card->func, HOST_POWER_UP, CONFIG_REG, &ret);
+
+	sdio_release_host(card->func);
+
+	BT_DBG("wake up firmware");
+
+	return ret;
+}
+
+static int btmrvl_sdio_probe(struct sdio_func *func,
+					const struct sdio_device_id *id)
+{
+	int ret = 0;
+	struct btmrvl_private *priv = NULL;
+	struct btmrvl_sdio_card *card = NULL;
+
+	BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
+			id->vendor, id->device, id->class, func->num);
+
+	card = kzalloc(sizeof(*card), GFP_KERNEL);
+	if (!card) {
+		ret = -ENOMEM;
+		goto done;
+	}
+
+	card->func = func;
+
+	if (id->driver_data) {
+		struct btmrvl_sdio_device *data = (void *) id->driver_data;
+		card->helper   = data->helper;
+		card->firmware = data->firmware;
+	}
+
+	if (btmrvl_sdio_register_dev(card) < 0) {
+		BT_ERR("Failed to register BT device!");
+		ret = -ENODEV;
+		goto free_card;
+	}
+
+	/* Disable the interrupts on the card */
+	btmrvl_sdio_disable_host_int(card);
+
+	if (btmrvl_sdio_download_fw(card)) {
+		BT_ERR("Downloading firmware failed!");
+		ret = -ENODEV;
+		goto unreg_dev;
+	}
+
+	msleep(100);
+
+	btmrvl_sdio_enable_host_int(card);
+
+	priv = btmrvl_add_card(card);
+	if (!priv) {
+		BT_ERR("Initializing card failed!");
+		ret = -ENODEV;
+		goto disable_host_int;
+	}
+
+	card->priv = priv;
+
+	/* Initialize the interface specific function pointers */
+	priv->hw_host_to_card = btmrvl_sdio_host_to_card;
+	priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
+
+	btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
+
+	return 0;
+
+disable_host_int:
+	btmrvl_sdio_disable_host_int(card);
+unreg_dev:
+	btmrvl_sdio_unregister_dev(card);
+free_card:
+	kfree(card);
+done:
+	return ret;
+}
+
+static void btmrvl_sdio_remove(struct sdio_func *func)
+{
+	struct btmrvl_sdio_card *card;
+
+	if (func) {
+		card = sdio_get_drvdata(func);
+		if (card) {
+			/* Send SHUTDOWN command & disable interrupt
+			 * if user removes the module.
+			 */
+			if (user_rmmod) {
+				btmrvl_send_module_cfg_cmd(card->priv,
+							MODULE_SHUTDOWN_REQ);
+				btmrvl_sdio_disable_host_int(card);
+			}
+			BT_DBG("unregester dev");
+			btmrvl_sdio_unregister_dev(card);
+			btmrvl_remove_card(card->priv);
+			kfree(card);
+		}
+	}
+}
+
+static struct sdio_driver bt_mrvl_sdio = {
+	.name		= "btmrvl_sdio",
+	.id_table	= btmrvl_sdio_ids,
+	.probe		= btmrvl_sdio_probe,
+	.remove		= btmrvl_sdio_remove,
+};
+
+static int btmrvl_sdio_init_module(void)
+{
+	if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
+		BT_ERR("SDIO Driver Registration Failed");
+		return -ENODEV;
+	}
+
+	/* Clear the flag in case user removes the card. */
+	user_rmmod = 0;
+
+	return 0;
+}
+
+static void btmrvl_sdio_exit_module(void)
+{
+	/* Set the flag as user is removing this module. */
+	user_rmmod = 1;
+
+	sdio_unregister_driver(&bt_mrvl_sdio);
+}
+
+module_init(btmrvl_sdio_init_module);
+module_exit(btmrvl_sdio_exit_module);
+
+MODULE_AUTHOR("Marvell International Ltd.");
+MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL v2");

drivers/bluetooth/btmrvl_sdio.h

···
+/**
+ * Marvell BT-over-SDIO driver: SDIO interface related definitions
+ *
+ * Copyright (C) 2009, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ *
+ **/
+
+#define SDIO_HEADER_LEN			4
+
+/* SD block size can not bigger than 64 due to buf size limit in firmware */
+/* define SD block size for data Tx/Rx */
+#define SDIO_BLOCK_SIZE			64
+
+/* Number of blocks for firmware transfer */
+#define FIRMWARE_TRANSFER_NBLOCK	2
+
+/* This is for firmware specific length */
+#define FW_EXTRA_LEN			36
+
+#define MRVDRV_SIZE_OF_CMD_BUFFER       (2 * 1024)
+
+#define MRVDRV_BT_RX_PACKET_BUFFER_SIZE \
+	(HCI_MAX_FRAME_SIZE + FW_EXTRA_LEN)
+
+#define ALLOC_BUF_SIZE	(((max_t (int, MRVDRV_BT_RX_PACKET_BUFFER_SIZE, \
+			MRVDRV_SIZE_OF_CMD_BUFFER) + SDIO_HEADER_LEN \
+			+ SDIO_BLOCK_SIZE - 1) / SDIO_BLOCK_SIZE) \
+			* SDIO_BLOCK_SIZE)
+
+/* The number of times to try when polling for status */
+#define MAX_POLL_TRIES			100
+
+/* Max retry number of CMD53 write */
+#define MAX_WRITE_IOMEM_RETRY		2
+
+/* Host Control Registers */
+#define IO_PORT_0_REG			0x00
+#define IO_PORT_1_REG			0x01
+#define IO_PORT_2_REG			0x02
+
+#define CONFIG_REG			0x03
+#define HOST_POWER_UP			BIT(1)
+#define HOST_CMD53_FIN			BIT(2)
+
+#define HOST_INT_MASK_REG		0x04
+#define HIM_DISABLE			0xff
+#define HIM_ENABLE			(BIT(0) | BIT(1))
+
+#define HOST_INTSTATUS_REG		0x05
+#define UP_LD_HOST_INT_STATUS		BIT(0)
+#define DN_LD_HOST_INT_STATUS		BIT(1)
+
+/* Card Control Registers */
+#define SQ_READ_BASE_ADDRESS_A0_REG  	0x10
+#define SQ_READ_BASE_ADDRESS_A1_REG  	0x11
+
+#define CARD_STATUS_REG              	0x20
+#define DN_LD_CARD_RDY               	BIT(0)
+#define CARD_IO_READY              	BIT(3)
+
+#define CARD_FW_STATUS0_REG		0x40
+#define CARD_FW_STATUS1_REG		0x41
+#define FIRMWARE_READY			0xfedc
+
+#define CARD_RX_LEN_REG			0x42
+#define CARD_RX_UNIT_REG		0x43
+
+
+struct btmrvl_sdio_card {
+	struct sdio_func *func;
+	u32 ioport;
+	const char *helper;
+	const char *firmware;
+	u8 rx_unit;
+	struct btmrvl_private *priv;
+};
+
+struct btmrvl_sdio_device {
+	const char *helper;
+	const char *firmware;
+};
+
+
+/* Platform specific DMA alignment */
+#define BTSDIO_DMA_ALIGN		8
+
+/* Macros for Data Alignment : size */
+#define ALIGN_SZ(p, a)	\
+	(((p) + ((a) - 1)) & ~((a) - 1))
+
+/* Macros for Data Alignment : address */
+#define ALIGN_ADDR(p, a)	\
+	((((unsigned long)(p)) + (((unsigned long)(a)) - 1)) & \
+					~(((unsigned long)(a)) - 1))

drivers/bluetooth/btusb.c

···
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
 
-#define VERSION "0.5"
+#define VERSION "0.6"
 
 static int ignore_dga;
 static int ignore_csr;
···
 #define BTUSB_INTR_RUNNING	0
 #define BTUSB_BULK_RUNNING	1
 #define BTUSB_ISOC_RUNNING	2
+#define BTUSB_SUSPENDING	3
 
 struct btusb_data {
 	struct hci_dev       *hdev;
···
 	unsigned long flags;
 
 	struct work_struct work;
+	struct work_struct waker;
 
 	struct usb_anchor tx_anchor;
 	struct usb_anchor intr_anchor;
 	struct usb_anchor bulk_anchor;
 	struct usb_anchor isoc_anchor;
+	struct usb_anchor deferred;
+	int tx_in_flight;
+	spinlock_t txlock;
 
 	struct usb_endpoint_descriptor *intr_ep;
 	struct usb_endpoint_descriptor *bulk_tx_ep;
···
 	unsigned int sco_num;
 	int isoc_altsetting;
 	int suspend_count;
+	int did_iso_resume:1;
 };
+
+static int inc_tx(struct btusb_data *data)
+{
+	unsigned long flags;
+	int rv;
+
+	spin_lock_irqsave(&data->txlock, flags);
+	rv = test_bit(BTUSB_SUSPENDING, &data->flags);
+	if (!rv)
+		data->tx_in_flight++;
+	spin_unlock_irqrestore(&data->txlock, flags);
+
+	return rv;
+}
 
 static void btusb_intr_complete(struct urb *urb)
 {
···
 	if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
 		return;
 
+	usb_mark_last_busy(data->udev);
 	usb_anchor_urb(urb, &data->intr_anchor);
 
 	err = usb_submit_urb(urb, GFP_ATOMIC);
···
 	struct urb *urb;
 	unsigned char *buf;
 	unsigned int pipe;
-	int err, size;
+	int err, size = HCI_MAX_FRAME_SIZE;
 
 	BT_DBG("%s", hdev->name);
 
···
 	urb = usb_alloc_urb(0, mem_flags);
 	if (!urb)
 		return -ENOMEM;
-
-	size = le16_to_cpu(data->bulk_rx_ep->wMaxPacketSize);
 
 	buf = kmalloc(size, mem_flags);
 	if (!buf) {
···
 
 	urb->transfer_flags |= URB_FREE_BUFFER;
 
+	usb_mark_last_busy(data->udev);
 	usb_anchor_urb(urb, &data->bulk_anchor);
 
 	err = usb_submit_urb(urb, mem_flags);
···
 {
 	struct sk_buff *skb = urb->context;
 	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
+	struct btusb_data *data = hdev->driver_data;
+
+	BT_DBG("%s urb %p status %d count %d", hdev->name,
+					urb, urb->status, urb->actual_length);
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		goto done;
+
+	if (!urb->status)
+		hdev->stat.byte_tx += urb->transfer_buffer_length;
+	else
+		hdev->stat.err_tx++;
+
+done:
+	spin_lock(&data->txlock);
+	data->tx_in_flight--;
+	spin_unlock(&data->txlock);
+
+	kfree(urb->setup_packet);
+
+	kfree_skb(skb);
+}
+
+static void btusb_isoc_tx_complete(struct urb *urb)
+{
+	struct sk_buff *skb = urb->context;
+	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 
 	BT_DBG("%s urb %p status %d count %d", hdev->name,
 					urb, urb->status, urb->actual_length);
···
 
 	BT_DBG("%s", hdev->name);
 
+	err = usb_autopm_get_interface(data->intf);
+	if (err < 0)
+		return err;
+
+	data->intf->needs_remote_wakeup = 1;
+
 	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
-		return 0;
+		goto done;
 
 	if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
-		return 0;
+		goto done;
 
 	err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
 	if (err < 0)
···
 	set_bit(BTUSB_BULK_RUNNING, &data->flags);
 	btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 
+done:
+	usb_autopm_put_interface(data->intf);
 	return 0;
 
 failed:
 	clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 	clear_bit(HCI_RUNNING, &hdev->flags);
+	usb_autopm_put_interface(data->intf);
 	return err;
+}
+
+static void btusb_stop_traffic(struct btusb_data *data)
+{
+	usb_kill_anchored_urbs(&data->intr_anchor);
+	usb_kill_anchored_urbs(&data->bulk_anchor);
+	usb_kill_anchored_urbs(&data->isoc_anchor);
 }
 
 static int btusb_close(struct hci_dev *hdev)
 {
 	struct btusb_data *data = hdev->driver_data;
+	int err;
 
 	BT_DBG("%s", hdev->name);
 
···
 	cancel_work_sync(&data->work);
 
 	clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
-	usb_kill_anchored_urbs(&data->isoc_anchor);
-
 	clear_bit(BTUSB_BULK_RUNNING, &data->flags);
-	usb_kill_anchored_urbs(&data->bulk_anchor);
-
 	clear_bit(BTUSB_INTR_RUNNING, &data->flags);
-	usb_kill_anchored_urbs(&data->intr_anchor);
+
+	btusb_stop_traffic(data);
+	err = usb_autopm_get_interface(data->intf);
+	if (err < 0)
+		return 0;
+
+	data->intf->needs_remote_wakeup = 0;
+	usb_autopm_put_interface(data->intf);
 
 	return 0;
 }
···
 		urb->dev      = data->udev;
 		urb->pipe     = pipe;
 		urb->context  = skb;
-		urb->complete = btusb_tx_complete;
+		urb->complete = btusb_isoc_tx_complete;
 		urb->interval = data->isoc_tx_ep->bInterval;
 
 		urb->transfer_flags  = URB_ISO_ASAP;
···
 				le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
 
 		hdev->stat.sco_tx++;
-		break;
+		goto skip_waking;
 
 	default:
 		return -EILSEQ;
 	}
 
+	err = inc_tx(data);
+	if (err) {
+		usb_anchor_urb(urb, &data->deferred);
+		schedule_work(&data->waker);
+		err = 0;
+		goto done;
+	}
+
+skip_waking:
 	usb_anchor_urb(urb, &data->tx_anchor);
 
 	err = usb_submit_urb(urb, GFP_ATOMIC);
···
 		BT_ERR("%s urb %p submission failed", hdev->name, urb);
 		kfree(urb->setup_packet);
 		usb_unanchor_urb(urb);
+	} else {
+		usb_mark_last_busy(data->udev);
 	}
 
 	usb_free_urb(urb);
 
+done:
 	return err;
 }
 
···
 {
 	struct btusb_data *data = container_of(work, struct btusb_data, work);
 	struct hci_dev *hdev = data->hdev;
+	int err;
 
 	if (hdev->conn_hash.sco_num > 0) {
+		if (!data->did_iso_resume) {
+			err = usb_autopm_get_interface(data->isoc);
+			if (err < 0) {
+				clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
+				usb_kill_anchored_urbs(&data->isoc_anchor);
+				return;
+			}
+
+			data->did_iso_resume = 1;
+		}
 		if (data->isoc_altsetting != 2) {
 			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 			usb_kill_anchored_urbs(&data->isoc_anchor);
···
 		usb_kill_anchored_urbs(&data->isoc_anchor);
 
 		__set_isoc_interface(hdev, 0);
+		if (data->did_iso_resume) {
+			data->did_iso_resume = 0;
+			usb_autopm_put_interface(data->isoc);
+		}
 	}
+}
+
+static void btusb_waker(struct work_struct *work)
+{
+	struct btusb_data *data = container_of(work, struct btusb_data, waker);
+	int err;
+
+	err = usb_autopm_get_interface(data->intf);
+	if (err < 0)
+		return;
+
+	usb_autopm_put_interface(data->intf);
 }
 
 static int btusb_probe(struct usb_interface *intf,
···
 	spin_lock_init(&data->lock);
 
 	INIT_WORK(&data->work, btusb_work);
+	INIT_WORK(&data->waker, btusb_waker);
+	spin_lock_init(&data->txlock);
 
 	init_usb_anchor(&data->tx_anchor);
 	init_usb_anchor(&data->intr_anchor);
 	init_usb_anchor(&data->bulk_anchor);
 	init_usb_anchor(&data->isoc_anchor);
+	init_usb_anchor(&data->deferred);
 
 	hdev = hci_alloc_dev();
 	if (!hdev) {
···
 	hci_free_dev(hdev);
 }
 
+#ifdef CONFIG_PM
 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
 {
 	struct btusb_data *data = usb_get_intfdata(intf);
···
 	if (data->suspend_count++)
 		return 0;
 
+	spin_lock_irq(&data->txlock);
+	if (!(interface_to_usbdev(intf)->auto_pm && data->tx_in_flight)) {
+		set_bit(BTUSB_SUSPENDING, &data->flags);
+		spin_unlock_irq(&data->txlock);
+	} else {
+		spin_unlock_irq(&data->txlock);
+		data->suspend_count--;
+		return -EBUSY;
+	}
+
 	cancel_work_sync(&data->work);
 
+	btusb_stop_traffic(data);
 	usb_kill_anchored_urbs(&data->tx_anchor);
 
-	usb_kill_anchored_urbs(&data->isoc_anchor);
-	usb_kill_anchored_urbs(&data->bulk_anchor);
-	usb_kill_anchored_urbs(&data->intr_anchor);
-
 	return 0;
+}
+
+static void play_deferred(struct btusb_data *data)
+{
+	struct urb *urb;
+	int err;
+
+	while ((urb = usb_get_from_anchor(&data->deferred))) {
+		err = usb_submit_urb(urb, GFP_ATOMIC);
+		if (err < 0)
+			break;
+
+		data->tx_in_flight++;
+	}
+	usb_scuttle_anchored_urbs(&data->deferred);
 }
 
 static int btusb_resume(struct usb_interface *intf)
 {
 	struct btusb_data *data = usb_get_intfdata(intf);
 	struct hci_dev *hdev = data->hdev;
-	int err;
+	int err = 0;
 
 	BT_DBG("intf %p", intf);
 
···
 		return 0;
 
 	if (!test_bit(HCI_RUNNING, &hdev->flags))
-		return 0;
+		goto done;
 
 	if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
 		err = btusb_submit_intr_urb(hdev, GFP_NOIO);
 		if (err < 0) {
 			clear_bit(BTUSB_INTR_RUNNING, &data->flags);
-			return err;
+			goto failed;
 		}
 	}
 
···
 		err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
 		if (err < 0) {
 			clear_bit(BTUSB_BULK_RUNNING, &data->flags);
-			return err;
-		} else
-			btusb_submit_bulk_urb(hdev, GFP_NOIO);
+			goto failed;
+		}
+
+		btusb_submit_bulk_urb(hdev, GFP_NOIO);
 	}
 
 	if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
···
 			btusb_submit_isoc_urb(hdev, GFP_NOIO);
 	}
 
+	spin_lock_irq(&data->txlock);
+	play_deferred(data);
+	clear_bit(BTUSB_SUSPENDING, &data->flags);
+	spin_unlock_irq(&data->txlock);
+	schedule_work(&data->work);
+
 	return 0;
+
+failed:
+	usb_scuttle_anchored_urbs(&data->deferred);
+done:
+	spin_lock_irq(&data->txlock);
+	clear_bit(BTUSB_SUSPENDING, &data->flags);
+	spin_unlock_irq(&data->txlock);
+
+	return err;
 }
+#endif
 
 static struct usb_driver btusb_driver = {
 	.name		= "btusb",
 	.probe		= btusb_probe,
 	.disconnect	= btusb_disconnect,
+#ifdef CONFIG_PM
 	.suspend	= btusb_suspend,
 	.resume		= btusb_resume,
+#endif
 	.id_table	= btusb_table,
+	.supports_autosuspend = 1,
 };
 
 static int __init btusb_init(void)

drivers/bluetooth/hci_bcsp.c

···
 
 	i = 0;
 	skb_queue_walk_safe(&bcsp->unack, skb, tmp) {
-		if (i++ >= pkts_to_be_removed)
+		if (i >= pkts_to_be_removed)
 			break;
+		i++;
 
 		__skb_unlink(skb, &bcsp->unack);
 		kfree_skb(skb);

include/net/bluetooth/bluetooth.h

···
 struct bt_skb_cb {
 	__u8 pkt_type;
 	__u8 incoming;
+	__u8 tx_seq;
+	__u8 retries;
+	__u8 sar;
 };
-#define bt_cb(skb) ((struct bt_skb_cb *)(skb->cb)) 
+#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
 
 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
 {

include/net/bluetooth/hci_core.h

···
 	struct sk_buff		*sent_cmd;
 	struct sk_buff		*reassembly[3];
 
-	struct semaphore	req_lock;
+	struct mutex		req_lock;
 	wait_queue_head_t	req_wait_q;
 	__u32			req_status;
 	__u32			req_result;
···
 	struct work_struct work_del;
 
 	struct device	dev;
+	atomic_t	devref;
 
 	struct hci_dev	*hdev;
 	void		*l2cap_data;
···
 
 void hci_conn_enter_active_mode(struct hci_conn *conn);
 void hci_conn_enter_sniff_mode(struct hci_conn *conn);
+
+void hci_conn_hold_device(struct hci_conn *conn);
+void hci_conn_put_device(struct hci_conn *conn);
 
 static inline void hci_conn_hold(struct hci_conn *conn)
 {
···
 #define HCI_REQ_PEND	  1
 #define HCI_REQ_CANCELED  2
 
-#define hci_req_lock(d)		down(&d->req_lock)
-#define hci_req_unlock(d)	up(&d->req_lock)
+#define hci_req_lock(d)		mutex_lock(&d->req_lock)
+#define hci_req_unlock(d)	mutex_unlock(&d->req_lock)
 
 void hci_req_complete(struct hci_dev *hdev, int result);
 

include/net/bluetooth/l2cap.h

···
 
 /* L2CAP defaults */
 #define L2CAP_DEFAULT_MTU		672
+#define L2CAP_DEFAULT_MIN_MTU		48
 #define L2CAP_DEFAULT_FLUSH_TO		0xffff
-#define L2CAP_DEFAULT_RX_WINDOW		1
-#define L2CAP_DEFAULT_MAX_RECEIVE	1
-#define L2CAP_DEFAULT_RETRANS_TO	300    /* 300 milliseconds */
-#define L2CAP_DEFAULT_MONITOR_TO	1000   /* 1 second */
-#define L2CAP_DEFAULT_MAX_RX_APDU	0xfff7
+#define L2CAP_DEFAULT_TX_WINDOW		63
+#define L2CAP_DEFAULT_NUM_TO_ACK        (L2CAP_DEFAULT_TX_WINDOW/5)
+#define L2CAP_DEFAULT_MAX_TX		3
+#define L2CAP_DEFAULT_RETRANS_TO	1000    /* 1 second */
+#define L2CAP_DEFAULT_MONITOR_TO	12000   /* 12 seconds */
+#define L2CAP_DEFAULT_MAX_PDU_SIZE	672
 
 #define L2CAP_CONN_TIMEOUT	(40000) /* 40 seconds */
 #define L2CAP_INFO_TIMEOUT	(4000)  /*  4 seconds */
···
 	__u16 imtu;
 	__u16 flush_to;
 	__u8  mode;
+	__u8  fcs;
 };
 
 #define L2CAP_CONNINFO	0x02
···
 /* L2CAP checksum option */
 #define L2CAP_FCS_NONE		0x00
 #define L2CAP_FCS_CRC16		0x01
+
+/* L2CAP Control Field bit masks */
+#define L2CAP_CTRL_SAR               0xC000
+#define L2CAP_CTRL_REQSEQ            0x3F00
+#define L2CAP_CTRL_TXSEQ             0x007E
+#define L2CAP_CTRL_RETRANS           0x0080
+#define L2CAP_CTRL_FINAL             0x0080
+#define L2CAP_CTRL_POLL              0x0010
+#define L2CAP_CTRL_SUPERVISE         0x000C
+#define L2CAP_CTRL_FRAME_TYPE        0x0001 /* I- or S-Frame */
+
+#define L2CAP_CTRL_TXSEQ_SHIFT      1
+#define L2CAP_CTRL_REQSEQ_SHIFT     8
+#define L2CAP_CTRL_SAR_SHIFT       14
+
+/* L2CAP Supervisory Function */
+#define L2CAP_SUPER_RCV_READY           0x0000
+#define L2CAP_SUPER_REJECT              0x0004
+#define L2CAP_SUPER_RCV_NOT_READY       0x0008
+#define L2CAP_SUPER_SELECT_REJECT       0x000C
+
+/* L2CAP Segmentation and Reassembly */
+#define L2CAP_SDU_UNSEGMENTED       0x0000
+#define L2CAP_SDU_START             0x4000
+#define L2CAP_SDU_END               0x8000
+#define L2CAP_SDU_CONTINUE          0xC000
 
 /* L2CAP structures */
 struct l2cap_hdr {
···
 #define L2CAP_MODE_RETRANS	0x01
 #define L2CAP_MODE_FLOWCTL	0x02
 #define L2CAP_MODE_ERTM		0x03
-#define L2CAP_MODE_STREAM	0x04
+#define L2CAP_MODE_STREAMING	0x04
 
 struct l2cap_disconn_req {
 	__le16     dcid;
···
 
 /* ----- L2CAP channel and socket info ----- */
 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
+#define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue)
+#define SREJ_QUEUE(sk) (&l2cap_pi(sk)->srej_queue)
+#define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list)
+
+struct srej_list {
+	__u8	tx_seq;
+	struct list_head list;
+};
 
 struct l2cap_pinfo {
 	struct bt_sock	bt;
···
 	__u16		imtu;
 	__u16		omtu;
 	__u16		flush_to;
-	__u8            sec_level;
+	__u8		mode;
+	__u8		num_conf_req;
+	__u8		num_conf_rsp;
+
+	__u8		fcs;
+	__u8		sec_level;
 	__u8		role_switch;
-	__u8            force_reliable;
+	__u8		force_reliable;
 
 	__u8		conf_req[64];
 	__u8		conf_len;
 	__u8		conf_state;
-	__u8		conf_retry;
+	__u8		conn_state;
+
+	__u8		next_tx_seq;
+	__u8		expected_ack_seq;
+	__u8		req_seq;
+	__u8		expected_tx_seq;
+	__u8		buffer_seq;
+	__u8		buffer_seq_srej;
+	__u8		srej_save_reqseq;
+	__u8		unacked_frames;
+	__u8		retry_count;
+	__u8		num_to_ack;
+	__u16		sdu_len;
+	__u16		partial_sdu_len;
+	struct sk_buff	*sdu;
 
 	__u8		ident;
 
+	__u8		remote_tx_win;
+	__u8		remote_max_tx;
+	__u16		retrans_timeout;
+	__u16		monitor_timeout;
+	__u16		max_pdu_size;
+
 	__le16		sport;
 
+	struct timer_list	retrans_timer;
+	struct timer_list	monitor_timer;
+	struct sk_buff_head	tx_queue;
+	struct sk_buff_head	srej_queue;
+	struct srej_list	srej_l;
 	struct l2cap_conn	*conn;
 	struct sock		*next_c;
 	struct sock		*prev_c;
 };
 
-#define L2CAP_CONF_REQ_SENT	0x01
-#define L2CAP_CONF_INPUT_DONE	0x02
-#define L2CAP_CONF_OUTPUT_DONE	0x04
-#define L2CAP_CONF_CONNECT_PEND	0x80
+#define L2CAP_CONF_REQ_SENT       0x01
+#define L2CAP_CONF_INPUT_DONE     0x02
+#define L2CAP_CONF_OUTPUT_DONE    0x04
+#define L2CAP_CONF_MTU_DONE       0x08
+#define L2CAP_CONF_MODE_DONE      0x10
+#define L2CAP_CONF_CONNECT_PEND   0x20
+#define L2CAP_CONF_NO_FCS_RECV    0x40
+#define L2CAP_CONF_STATE2_DEVICE  0x80
 
-#define L2CAP_CONF_MAX_RETRIES	2
+#define L2CAP_CONF_MAX_CONF_REQ 2
+#define L2CAP_CONF_MAX_CONF_RSP 2
+
+#define L2CAP_CONN_SAR_SDU         0x01
+#define L2CAP_CONN_SREJ_SENT       0x02
+#define L2CAP_CONN_WAIT_F          0x04
+#define L2CAP_CONN_SREJ_ACT        0x08
+#define L2CAP_CONN_SEND_PBIT       0x10
+#define L2CAP_CONN_REMOTE_BUSY     0x20
+#define L2CAP_CONN_LOCAL_BUSY      0x40
+
+#define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \
+		jiffies +  msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO));
+#define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \
+		jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO));
+
+static inline int l2cap_tx_window_full(struct sock *sk)
+{
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	int sub;
+
+	sub = (pi->next_tx_seq - pi->expected_ack_seq) % 64;
+
+	if (sub < 0)
+		sub += 64;
+
+	return (sub == pi->remote_tx_win);
+}
+
+#define __get_txseq(ctrl) ((ctrl) & L2CAP_CTRL_TXSEQ) >> 1
+#define __get_reqseq(ctrl) ((ctrl) & L2CAP_CTRL_REQSEQ) >> 8
+#define __is_iframe(ctrl) !((ctrl) & L2CAP_CTRL_FRAME_TYPE)
+#define __is_sframe(ctrl) (ctrl) & L2CAP_CTRL_FRAME_TYPE
+#define __is_sar_start(ctrl) ((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START
 
 void l2cap_load(void);
 

include/net/bluetooth/rfcomm.h

···
 #define RFCOMM_CONN_TIMEOUT (HZ * 30)
 #define RFCOMM_DISC_TIMEOUT (HZ * 20)
 #define RFCOMM_AUTH_TIMEOUT (HZ * 25)
+#define RFCOMM_IDLE_TIMEOUT (HZ * 2)
 
 #define RFCOMM_DEFAULT_MTU	127
 #define RFCOMM_DEFAULT_CREDITS	7
···
 struct rfcomm_session {
 	struct list_head list;
 	struct socket   *sock;
+	struct timer_list timer;
 	unsigned long    state;
 	unsigned long    flags;
 	atomic_t         refcnt;

net/bluetooth/Kconfig

···
 config BT_L2CAP
 	tristate "L2CAP protocol support"
 	depends on BT
+	select CRC16
 	help
 	  L2CAP (Logical Link Control and Adaptation Protocol) provides
 	  connection oriented and connection-less data transport.  L2CAP

net/bluetooth/hci_conn.c

···
 	if (hdev->notify)
 		hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
 
+	atomic_set(&conn->devref, 0);
+
 	hci_conn_init_sysfs(conn);
 
 	tasklet_enable(&hdev->tx_task);
···
 
 	skb_queue_purge(&conn->data_q);
 
-	hci_conn_del_sysfs(conn);
+	hci_conn_put_device(conn);
 
 	hci_dev_put(hdev);
 
···
 
 	hci_dev_unlock(hdev);
 }
+
+void hci_conn_hold_device(struct hci_conn *conn)
+{
+	atomic_inc(&conn->devref);
+}
+EXPORT_SYMBOL(hci_conn_hold_device);
+
+void hci_conn_put_device(struct hci_conn *conn)
+{
+	if (atomic_dec_and_test(&conn->devref))
+		hci_conn_del_sysfs(conn);
+}
+EXPORT_SYMBOL(hci_conn_put_device);
 
 int hci_get_conn_list(void __user *arg)
 {

net/bluetooth/hci_core.c

···
 		hdev->reassembly[i] = NULL;
 
 	init_waitqueue_head(&hdev->req_wait_q);
-	init_MUTEX(&hdev->req_lock);
+	mutex_init(&hdev->req_lock);
 
 	inquiry_cache_init(hdev);
 

net/bluetooth/hci_event.c

···
 		} else
 			conn->state = BT_CONNECTED;
 
+		hci_conn_hold_device(conn);
 		hci_conn_add_sysfs(conn);
 
 		if (test_bit(HCI_AUTH, &hdev->flags))
···
 		conn->handle = __le16_to_cpu(ev->handle);
 		conn->state  = BT_CONNECTED;
 
+		hci_conn_hold_device(conn);
 		hci_conn_add_sysfs(conn);
 		break;
 

net/bluetooth/hidp/core.c

···
 
 #include <linux/input.h>
 #include <linux/hid.h>
+#include <linux/hidraw.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
···
 {
 	__module_get(THIS_MODULE);
 	list_add(&session->list, &hidp_session_list);
+
+	hci_conn_hold_device(session->conn);
 }
 
 static void __hidp_unlink_session(struct hidp_session *session)
 {
+	hci_conn_put_device(session->conn);
+
 	list_del(&session->list);
 	module_put(THIS_MODULE);
 }
···
 
 		/* Kill session thread */
 		atomic_inc(&session->terminate);
+		hidp_schedule(session);
 	}
 }
 
···
 	if (session->hid) {
 		if (session->hid->claimed & HID_CLAIMED_INPUT)
 			hidinput_disconnect(session->hid);
+		if (session->hid->claimed & HID_CLAIMED_HIDRAW)
+			hidraw_disconnect(session->hid);
+
 		hid_destroy_device(session->hid);
+		session->hid = NULL;
 	}
 
 	/* Wakeup user-space polling for socket errors */
···
 {
 	bdaddr_t *src = &bt_sk(session->ctrl_sock->sk)->src;
 	bdaddr_t *dst = &bt_sk(session->ctrl_sock->sk)->dst;
+	struct device *device = NULL;
 	struct hci_dev *hdev;
-	struct hci_conn *conn;
 
 	hdev = hci_get_route(dst, src);
 	if (!hdev)
 		return NULL;
 
-	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
+	session->conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
+	if (session->conn)
+		device = &session->conn->dev;
 
 	hci_dev_put(hdev);
 
-	return conn ? &conn->dev : NULL;
+	return device;
 }
 
 static int hidp_setup_input(struct hidp_session *session,
 				struct hidp_connadd_req *req)
 {
 	struct input_dev *input;
-	int i;
+	int err, i;
 
 	input = input_allocate_device();
 	if (!input)
···
 
 	input->event = hidp_input_event;
 
-	return input_register_device(input);
+	err = input_register_device(input);
+	if (err < 0) {
+		hci_conn_put_device(session->conn);
+		return err;
+	}
+
+	return 0;
 }
 
 static int hidp_open(struct hid_device *hid)
···
 {
 	struct hid_device *hid;
 	bdaddr_t src, dst;
-	int ret;
+	int err;
 
 	hid = hid_allocate_device();
-	if (IS_ERR(hid)) {
-		ret = PTR_ERR(session->hid);
-		goto err;
-	}
+	if (IS_ERR(hid))
+		return PTR_ERR(session->hid);
 
 	session->hid = hid;
 	session->req = req;
···
 	hid->dev.parent = hidp_get_device(session);
 	hid->ll_driver = &hidp_hid_driver;
 
-	ret = hid_add_device(hid);
-	if (ret)
-		goto err_hid;
+	err = hid_add_device(hid);
+	if (err < 0)
+		goto failed;
 
 	return 0;
-err_hid:
+
+failed:
 	hid_destroy_device(hid);
 	session->hid = NULL;
-err:
-	return ret;
+
+	return err;
 }
 
 int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock)
···
 	if (req->rd_size > 0) {
 		err = hidp_setup_hid(session, req);
 		if (err && err != -ENODEV)
-			goto err_skb;
+			goto purge;
 	}
 
 	if (!session->hid) {
 		err = hidp_setup_input(session, req);
 		if (err < 0)
-			goto err_skb;
+			goto purge;
 	}
 
 	__hidp_link_session(session);
···
 
 	__hidp_unlink_session(session);
 
-	if (session->input)
+	if (session->input) {
 		input_unregister_device(session->input);
-	if (session->hid)
+		session->input = NULL;
+	}
+
+	if (session->hid) {
 		hid_destroy_device(session->hid);
-err_skb:
+		session->hid = NULL;
+	}
+
+purge:
 	skb_queue_purge(&session->ctrl_transmit);
 	skb_queue_purge(&session->intr_transmit);
+
 failed:
 	up_write(&hidp_session_sem);
 

net/bluetooth/hidp/hidp.h

···
 struct hidp_session {
 	struct list_head list;
 
+	struct hci_conn *conn;
+
 	struct socket *ctrl_sock;
 	struct socket *intr_sock;
 

net/bluetooth/l2cap.c

···
 #include <linux/list.h>
 #include <linux/device.h>
 #include <linux/uaccess.h>
+#include <linux/crc16.h>
 #include <net/sock.h>
 
 #include <asm/system.h>
···
 #include <net/bluetooth/hci_core.h>
 #include <net/bluetooth/l2cap.h>
 
-#define VERSION "2.13"
+#define VERSION "2.14"
+
+static int enable_ertm = 0;
 
 static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN;
 static u8 l2cap_fixed_chan[8] = { 0x02, };
···
 	return hci_send_acl(conn->hcon, skb, 0);
 }
 
+static inline int l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control)
+{
+	struct sk_buff *skb;
+	struct l2cap_hdr *lh;
+	struct l2cap_conn *conn = pi->conn;
+	int count, hlen = L2CAP_HDR_SIZE + 2;
+
+	if (pi->fcs == L2CAP_FCS_CRC16)
+		hlen += 2;
+
+	BT_DBG("pi %p, control 0x%2.2x", pi, control);
+
+	count = min_t(unsigned int, conn->mtu, hlen);
+	control |= L2CAP_CTRL_FRAME_TYPE;
+
+	skb = bt_skb_alloc(count, GFP_ATOMIC);
+	if (!skb)
+		return -ENOMEM;
+
+	lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
+	lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE);
+	lh->cid = cpu_to_le16(pi->dcid);
+	put_unaligned_le16(control, skb_put(skb, 2));
+
+	if (pi->fcs == L2CAP_FCS_CRC16) {
+		u16 fcs = crc16(0, (u8 *)lh, count - 2);
+		put_unaligned_le16(fcs, skb_put(skb, 2));
+	}
+
+	return hci_send_acl(pi->conn->hcon, skb, 0);
+}
+
+static inline int l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control)
+{
+	if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY)
+		control |= L2CAP_SUPER_RCV_NOT_READY;
+	else
+		control |= L2CAP_SUPER_RCV_READY;
+
+	return l2cap_send_sframe(pi, control);
+}
+
 static void l2cap_do_start(struct sock *sk)
 {
 	struct l2cap_conn *conn = l2cap_pi(sk)->conn;
···
 		l2cap_send_cmd(conn, conn->info_ident,
 					L2CAP_INFO_REQ, sizeof(req), &req);
 	}
+}
+
+static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk)
+{
+	struct l2cap_disconn_req req;
+
+	req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid);
+	req.scid = cpu_to_le16(l2cap_pi(sk)->scid);
+	l2cap_send_cmd(conn, l2cap_get_ident(conn),
+			L2CAP_DISCONN_REQ, sizeof(req), &req);
 }
 
 /* ---- L2CAP connections ---- */
···
 	case BT_CONFIG:
 		if (sk->sk_type == SOCK_SEQPACKET) {
 			struct l2cap_conn *conn = l2cap_pi(sk)->conn;
-			struct l2cap_disconn_req req;
 
 			sk->sk_state = BT_DISCONN;
 			l2cap_sock_set_timer(sk, sk->sk_sndtimeo);
-
-			req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid);
-			req.scid = cpu_to_le16(l2cap_pi(sk)->scid);
-			l2cap_send_cmd(conn, l2cap_get_ident(conn),
-					L2CAP_DISCONN_REQ, sizeof(req), &req);
+			l2cap_send_disconn_req(conn, sk);
 		} else
 			l2cap_chan_del(sk, reason);
 		break;
···
 
 		pi->imtu = l2cap_pi(parent)->imtu;
 		pi->omtu = l2cap_pi(parent)->omtu;
+		pi->mode = l2cap_pi(parent)->mode;
+		pi->fcs  = l2cap_pi(parent)->fcs;
 		pi->sec_level = l2cap_pi(parent)->sec_level;
 		pi->role_switch = l2cap_pi(parent)->role_switch;
 		pi->force_reliable = l2cap_pi(parent)->force_reliable;
 	} else {
 		pi->imtu = L2CAP_DEFAULT_MTU;
 		pi->omtu = 0;
+		pi->mode = L2CAP_MODE_BASIC;
+		pi->fcs  = L2CAP_FCS_CRC16;
 		pi->sec_level = BT_SECURITY_LOW;
 		pi->role_switch = 0;
 		pi->force_reliable = 0;
···
 		goto done;
 	}
 
+	switch (l2cap_pi(sk)->mode) {
+	case L2CAP_MODE_BASIC:
+		break;
+	case L2CAP_MODE_ERTM:
+	case L2CAP_MODE_STREAMING:
+		if (enable_ertm)
+			break;
+		/* fall through */
+	default:
+		err = -ENOTSUPP;
+		goto done;
+	}
+
 	switch (sk->sk_state) {
 	case BT_CONNECT:
 	case BT_CONNECT2:
···
 
 	if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) {
 		err = -EBADFD;
+		goto done;
+	}
+
+	switch (l2cap_pi(sk)->mode) {
+	case L2CAP_MODE_BASIC:
+		break;
+	case L2CAP_MODE_ERTM:
+	case L2CAP_MODE_STREAMING:
+		if (enable_ertm)
+			break;
+		/* fall through */
+	default:
+		err = -ENOTSUPP;
 		goto done;
 	}
 
···
 	return 0;
 }
 
-static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len)
+static void l2cap_monitor_timeout(unsigned long arg)
+{
+	struct sock *sk = (void *) arg;
+	u16 control;
+
+	bh_lock_sock(sk);
+	if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) {
+		l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk);
+		return;
+	}
+
+	l2cap_pi(sk)->retry_count++;
+	__mod_monitor_timer();
+
+	control = L2CAP_CTRL_POLL;
+	l2cap_send_rr_or_rnr(l2cap_pi(sk), control);
+	bh_unlock_sock(sk);
+}
+
+static void l2cap_retrans_timeout(unsigned long arg)
+{
+	struct sock *sk = (void *) arg;
+	u16 control;
+
+	bh_lock_sock(sk);
+	l2cap_pi(sk)->retry_count = 1;
+	__mod_monitor_timer();
+
+	l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F;
+
+	control = L2CAP_CTRL_POLL;
+	l2cap_send_rr_or_rnr(l2cap_pi(sk), control);
+	bh_unlock_sock(sk);
+}
+
+static void l2cap_drop_acked_frames(struct sock *sk)
+{
+	struct sk_buff *skb;
+
+	while ((skb = skb_peek(TX_QUEUE(sk)))) {
+		if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq)
+			break;
+
+		skb = skb_dequeue(TX_QUEUE(sk));
+		kfree_skb(skb);
+
+		l2cap_pi(sk)->unacked_frames--;
+	}
+
+	if (!l2cap_pi(sk)->unacked_frames)
+		del_timer(&l2cap_pi(sk)->retrans_timer);
+
+	return;
+}
+
+static inline int l2cap_do_send(struct sock *sk, struct sk_buff *skb)
+{
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	int err;
+
+	BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len);
+
+	err = hci_send_acl(pi->conn->hcon, skb, 0);
+	if (err < 0)
+		kfree_skb(skb);
+
+	return err;
+}
+
+static int l2cap_streaming_send(struct sock *sk)
+{
+	struct sk_buff *skb, *tx_skb;
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	u16 control, fcs;
+	int err;
+
+	while ((skb = sk->sk_send_head)) {
+		tx_skb = skb_clone(skb, GFP_ATOMIC);
+
+		control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE);
+		control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT;
+		put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE);
+
+		if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) {
+			fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2);
+			put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2);
+		}
+
+		err = l2cap_do_send(sk, tx_skb);
+		if (err < 0) {
+			l2cap_send_disconn_req(pi->conn, sk);
+			return err;
+		}
+
+		pi->next_tx_seq = (pi->next_tx_seq + 1) % 64;
+
+		if (skb_queue_is_last(TX_QUEUE(sk), skb))
+			sk->sk_send_head = NULL;
+		else
+			sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb);
+
+		skb = skb_dequeue(TX_QUEUE(sk));
+		kfree_skb(skb);
+	}
+	return 0;
+}
+
+static int l2cap_retransmit_frame(struct sock *sk, u8 tx_seq)
+{
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	struct sk_buff *skb, *tx_skb;
+	u16 control, fcs;
+	int err;
+
+	skb = skb_peek(TX_QUEUE(sk));
+	do {
+		if (bt_cb(skb)->tx_seq != tx_seq) {
+			if (skb_queue_is_last(TX_QUEUE(sk), skb))
+				break;
+			skb = skb_queue_next(TX_QUEUE(sk), skb);
+			continue;
+		}
+
+		if (pi->remote_max_tx &&
+				bt_cb(skb)->retries == pi->remote_max_tx) {
+			l2cap_send_disconn_req(pi->conn, sk);
+			break;
+		}
+
+		tx_skb = skb_clone(skb, GFP_ATOMIC);
+		bt_cb(skb)->retries++;
+		control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE);
+		control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT)
+				| (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT);
+		put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE);
+
+		if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) {
+			fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2);
+			put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2);
+		}
+
+		err = l2cap_do_send(sk, tx_skb);
+		if (err < 0) {
+			l2cap_send_disconn_req(pi->conn, sk);
+			return err;
+		}
+		break;
+	} while(1);
+	return 0;
+}
+
+static int l2cap_ertm_send(struct sock *sk)
+{
+	struct sk_buff *skb, *tx_skb;
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	u16 control, fcs;
+	int err;
+
+	if (pi->conn_state & L2CAP_CONN_WAIT_F)
+		return 0;
+
+	while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk))
+			&& !(pi->conn_state & L2CAP_CONN_REMOTE_BUSY)) {
+		tx_skb = skb_clone(skb, GFP_ATOMIC);
+
+		if (pi->remote_max_tx &&
+				bt_cb(skb)->retries == pi->remote_max_tx) {
+			l2cap_send_disconn_req(pi->conn, sk);
+			break;
+		}
+
+		bt_cb(skb)->retries++;
+
+		control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE);
+		control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT)
+				| (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT);
+		put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE);
+
+
+		if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) {
+			fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2);
+			put_unaligned_le16(fcs, skb->data + tx_skb->len - 2);
+		}
+
+		err = l2cap_do_send(sk, tx_skb);
+		if (err < 0) {
+			l2cap_send_disconn_req(pi->conn, sk);
+			return err;
+		}
+		__mod_retrans_timer();
+
+		bt_cb(skb)->tx_seq = pi->next_tx_seq;
+		pi->next_tx_seq = (pi->next_tx_seq + 1) % 64;
+
+		pi->unacked_frames++;
+
+		if (skb_queue_is_last(TX_QUEUE(sk), skb))
+			sk->sk_send_head = NULL;
+		else
+			sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb);
+	}
+
+	return 0;
+}
+
+static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb)
 {
 	struct l2cap_conn *conn = l2cap_pi(sk)->conn;
-	struct sk_buff *skb, **frag;
-	int err, hlen, count, sent = 0;
-	struct l2cap_hdr *lh;
-
-	BT_DBG("sk %p len %d", sk, len);
-
-	/* First fragment (with L2CAP header) */
-	if (sk->sk_type == SOCK_DGRAM)
-		hlen = L2CAP_HDR_SIZE + 2;
-	else
-		hlen = L2CAP_HDR_SIZE;
-
-	count = min_t(unsigned int, (conn->mtu - hlen), len);
-
-	skb = bt_skb_send_alloc(sk, hlen + count,
-			msg->msg_flags & MSG_DONTWAIT, &err);
-	if (!skb)
-		return err;
-
-	/* Create L2CAP header */
-	lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
-	lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid);
-	lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));
-
-	if (sk->sk_type == SOCK_DGRAM)
-		put_unaligned(l2cap_pi(sk)->psm, (__le16 *) skb_put(skb, 2));
+	struct sk_buff **frag;
+	int err, sent = 0;
 
 	if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) {
-		err = -EFAULT;
-		goto fail;
+		return -EFAULT;
 	}
 
 	sent += count;
···
 
 		*frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err);
 		if (!*frag)
-			goto fail;
-
-		if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) {
-			err = -EFAULT;
-			goto fail;
-		}
+			return -EFAULT;
+		if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count))
+			return -EFAULT;
 
 		sent += count;
 		len  -= count;
 
 		frag = &(*frag)->next;
 	}
-	err = hci_send_acl(conn->hcon, skb, 0);
-	if (err < 0)
-		goto fail;
 
 	return sent;
+}
 
-fail:
-	kfree_skb(skb);
-	return err;
+static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len)
+{
+	struct l2cap_conn *conn = l2cap_pi(sk)->conn;
+	struct sk_buff *skb;
+	int err, count, hlen = L2CAP_HDR_SIZE + 2;
+	struct l2cap_hdr *lh;
+
+	BT_DBG("sk %p len %d", sk, (int)len);
+
+	count = min_t(unsigned int, (conn->mtu - hlen), len);
+	skb = bt_skb_send_alloc(sk, count + hlen,
+			msg->msg_flags & MSG_DONTWAIT, &err);
+	if (!skb)
+		return ERR_PTR(-ENOMEM);
+
+	/* Create L2CAP header */
+	lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
+	lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid);
+	lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));
+	put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2));
+
+	err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb);
+	if (unlikely(err < 0)) {
+		kfree_skb(skb);
+		return ERR_PTR(err);
+	}
+	return skb;
+}
+
+static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len)
+{
+	struct l2cap_conn *conn = l2cap_pi(sk)->conn;
+	struct sk_buff *skb;
+	int err, count, hlen = L2CAP_HDR_SIZE;
+	struct l2cap_hdr *lh;
+
+	BT_DBG("sk %p len %d", sk, (int)len);
+
+	count = min_t(unsigned int, (conn->mtu - hlen), len);
+	skb = bt_skb_send_alloc(sk, count + hlen,
+			msg->msg_flags & MSG_DONTWAIT, &err);
+	if (!skb)
+		return ERR_PTR(-ENOMEM);
+
+	/* Create L2CAP header */
+	lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
+	lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid);
+	lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));
+
+	err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb);
+	if (unlikely(err < 0)) {
+		kfree_skb(skb);
+		return ERR_PTR(err);
+	}
+	return skb;
+}
+
+static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen)
+{
+	struct l2cap_conn *conn = l2cap_pi(sk)->conn;
+	struct sk_buff *skb;
+	int err, count, hlen = L2CAP_HDR_SIZE + 2;
+	struct l2cap_hdr *lh;
+
+	BT_DBG("sk %p len %d", sk, (int)len);
+
+	if (sdulen)
+		hlen += 2;
+
+	if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16)
+		hlen += 2;
+
+	count = min_t(unsigned int, (conn->mtu - hlen), len);
+	skb = bt_skb_send_alloc(sk, count + hlen,
+			msg->msg_flags & MSG_DONTWAIT, &err);
+	if (!skb)
+		return ERR_PTR(-ENOMEM);
+
+	/* Create L2CAP header */
+	lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
+	lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid);
+	lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));
+	put_unaligned_le16(control, skb_put(skb, 2));
+	if (sdulen)
+		put_unaligned_le16(sdulen, skb_put(skb, 2));
+
+	err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb);
+	if (unlikely(err < 0)) {
+		kfree_skb(skb);
+		return ERR_PTR(err);
+	}
+
+	if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16)
+		put_unaligned_le16(0, skb_put(skb, 2));
+
+	bt_cb(skb)->retries = 0;
+	return skb;
+}
+
+static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len)
+{
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	struct sk_buff *skb;
+	struct sk_buff_head sar_queue;
+	u16 control;
+	size_t size = 0;
+
+	__skb_queue_head_init(&sar_queue);
+	control = L2CAP_SDU_START;
+	skb = l2cap_create_iframe_pdu(sk, msg, pi->max_pdu_size, control, len);
+	if (IS_ERR(skb))
+		return PTR_ERR(skb);
+
+	__skb_queue_tail(&sar_queue, skb);
+	len -= pi->max_pdu_size;
+	size +=pi->max_pdu_size;
+	control = 0;
+
+	while (len > 0) {
+		size_t buflen;
+
+		if (len > pi->max_pdu_size) {
+			control |= L2CAP_SDU_CONTINUE;
+			buflen = pi->max_pdu_size;
+		} else {
+			control |= L2CAP_SDU_END;
+			buflen = len;
+		}
+
+		skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0);
+		if (IS_ERR(skb)) {
+			skb_queue_purge(&sar_queue);
+			return PTR_ERR(skb);
+		}
+
+		__skb_queue_tail(&sar_queue, skb);
+		len -= buflen;
+		size += buflen;
+		control = 0;
+	}
+	skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk));
+	if (sk->sk_send_head == NULL)
+		sk->sk_send_head = sar_queue.next;
+
+	return size;
 }
 
 static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len)
 {
 	struct sock *sk = sock->sk;
-	int err = 0;
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	struct sk_buff *skb;
+	u16 control;
+	int err;
 
 	BT_DBG("sock %p, sk %p", sock, sk);
 
···
 		return -EOPNOTSUPP;
 
 	/* Check outgoing MTU */
-	if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu)
+	if (sk->sk_type == SOCK_SEQPACKET && pi->mode == L2CAP_MODE_BASIC
+			&& len > pi->omtu)
 		return -EINVAL;
 
 	lock_sock(sk);
 
-	if (sk->sk_state == BT_CONNECTED)
-		err = l2cap_do_send(sk, msg, len);
-	else
+	if (sk->sk_state != BT_CONNECTED) {
 		err = -ENOTCONN;
+		goto done;
+	}
 
+	/* Connectionless channel */
+	if (sk->sk_type == SOCK_DGRAM) {
+		skb = l2cap_create_connless_pdu(sk, msg, len);
+		err = l2cap_do_send(sk, skb);
+		goto done;
+	}
+
+	switch (pi->mode) {
+	case L2CAP_MODE_BASIC:
+		/* Create a basic PDU */
+		skb = l2cap_create_basic_pdu(sk, msg, len);
+		if (IS_ERR(skb)) {
+			err = PTR_ERR(skb);
+			goto done;
+		}
+
+		err = l2cap_do_send(sk, skb);
+		if (!err)
+			err = len;
+		break;
+
+	case L2CAP_MODE_ERTM:
+	case L2CAP_MODE_STREAMING:
+		/* Entire SDU fits into one PDU */
+		if (len <= pi->max_pdu_size) {
+			control = L2CAP_SDU_UNSEGMENTED;
+			skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0);
+			if (IS_ERR(skb)) {
+				err = PTR_ERR(skb);
+				goto done;
+			}
+			__skb_queue_tail(TX_QUEUE(sk), skb);
+			if (sk->sk_send_head == NULL)
+				sk->sk_send_head = skb;
+		} else {
+		/* Segment SDU into multiples PDUs */
+			err = l2cap_sar_segment_sdu(sk, msg, len);
+			if (err < 0)
+				goto done;
+		}
+
+		if (pi->mode == L2CAP_MODE_STREAMING)
+			err = l2cap_streaming_send(sk);
+		else
+			err = l2cap_ertm_send(sk);
+
+		if (!err)
+			err = len;
+		break;
+
+	default:
+		BT_DBG("bad state %1.1x", pi->mode);
+		err = -EINVAL;
+	}
+
+done:
 	release_sock(sk);
 	return err;
 }
···
 		opts.imtu     = l2cap_pi(sk)->imtu;
 		opts.omtu     = l2cap_pi(sk)->omtu;
 		opts.flush_to = l2cap_pi(sk)->flush_to;
-		opts.mode     = L2CAP_MODE_BASIC;
+		opts.mode     = l2cap_pi(sk)->mode;
+		opts.fcs      = l2cap_pi(sk)->fcs;
 
 		len = min_t(unsigned int, sizeof(opts), optlen);
 		if (copy_from_user((char *) &opts, optval, len)) {
···
 			break;
 		}
 
-		l2cap_pi(sk)->imtu  = opts.imtu;
-		l2cap_pi(sk)->omtu  = opts.omtu;
+		l2cap_pi(sk)->imtu = opts.imtu;
+		l2cap_pi(sk)->omtu = opts.omtu;
+		l2cap_pi(sk)->mode = opts.mode;
+		l2cap_pi(sk)->fcs  = opts.fcs;
 		break;
 
 	case L2CAP_LM:
···
 		opts.imtu     = l2cap_pi(sk)->imtu;
 		opts.omtu     = l2cap_pi(sk)->omtu;
 		opts.flush_to = l2cap_pi(sk)->flush_to;
-		opts.mode     = L2CAP_MODE_BASIC;
+		opts.mode     = l2cap_pi(sk)->mode;
+		opts.fcs      = l2cap_pi(sk)->fcs;
 
 		len = min_t(unsigned int, len, sizeof(opts));
 		if (copy_to_user(optval, (char *) &opts, len))
···
 	*ptr += L2CAP_CONF_OPT_SIZE + len;
 }
 
+static int l2cap_mode_supported(__u8 mode, __u32 feat_mask)
+{
+	u32 local_feat_mask = l2cap_feat_mask;
+	if (enable_ertm)
+		local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING;
+
+	switch (mode) {
+	case L2CAP_MODE_ERTM:
+		return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask;
+	case L2CAP_MODE_STREAMING:
+		return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask;
+	default:
+		return 0x00;
+	}
+}
+
+static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask)
+{
+	switch (mode) {
+	case L2CAP_MODE_STREAMING:
+	case L2CAP_MODE_ERTM:
+		if (l2cap_mode_supported(mode, remote_feat_mask))
+			return mode;
+		/* fall through */
+	default:
+		return L2CAP_MODE_BASIC;
+	}
+}
+
 static int l2cap_build_conf_req(struct sock *sk, void *data)
 {
 	struct l2cap_pinfo *pi = l2cap_pi(sk);
 	struct l2cap_conf_req *req = data;
+	struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_ERTM };
 	void *ptr = req->data;
 
 	BT_DBG("sk %p", sk);
 
-	if (pi->imtu != L2CAP_DEFAULT_MTU)
-		l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu);
+	if (pi->num_conf_req || pi->num_conf_rsp)
+		goto done;
+
+	switch (pi->mode) {
+	case L2CAP_MODE_STREAMING:
+	case L2CAP_MODE_ERTM:
+		pi->conf_state |= L2CAP_CONF_STATE2_DEVICE;
+		if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask))
+			l2cap_send_disconn_req(pi->conn, sk);
+		break;
+	default:
+		pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask);
+		break;
+	}
+
+done:
+	switch (pi->mode) {
+	case L2CAP_MODE_BASIC:
+		if (pi->imtu != L2CAP_DEFAULT_MTU)
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu);
+		break;
+
+	case L2CAP_MODE_ERTM:
+		rfc.mode            = L2CAP_MODE_ERTM;
+		rfc.txwin_size      = L2CAP_DEFAULT_TX_WINDOW;
+		rfc.max_transmit    = L2CAP_DEFAULT_MAX_TX;
+		rfc.retrans_timeout = 0;
+		rfc.monitor_timeout = 0;
+		rfc.max_pdu_size    = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE);
+
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+					sizeof(rfc), (unsigned long) &rfc);
+
+		if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS))
+			break;
+
+		if (pi->fcs == L2CAP_FCS_NONE ||
+				pi->conf_state & L2CAP_CONF_NO_FCS_RECV) {
+			pi->fcs = L2CAP_FCS_NONE;
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs);
+		}
+		break;
+
+	case L2CAP_MODE_STREAMING:
+		rfc.mode            = L2CAP_MODE_STREAMING;
+		rfc.txwin_size      = 0;
+		rfc.max_transmit    = 0;
+		rfc.retrans_timeout = 0;
+		rfc.monitor_timeout = 0;
+		rfc.max_pdu_size    = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE);
+
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+					sizeof(rfc), (unsigned long) &rfc);
+
+		if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS))
+			break;
+
+		if (pi->fcs == L2CAP_FCS_NONE ||
+				pi->conf_state & L2CAP_CONF_NO_FCS_RECV) {
+			pi->fcs = L2CAP_FCS_NONE;
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs);
+		}
+		break;
+	}
 
 	/* FIXME: Need actual value of the flush timeout */
 	//if (flush_to != L2CAP_DEFAULT_FLUSH_TO)
···
 				memcpy(&rfc, (void *) val, olen);
 			break;
 
+		case L2CAP_CONF_FCS:
+			if (val == L2CAP_FCS_NONE)
+				pi->conf_state |= L2CAP_CONF_NO_FCS_RECV;
+
+			break;
+
 		default:
 			if (hint)
 				break;
···
 		}
 	}
 
+	if (pi->num_conf_rsp || pi->num_conf_req)
+		goto done;
+
+	switch (pi->mode) {
+	case L2CAP_MODE_STREAMING:
+	case L2CAP_MODE_ERTM:
+		pi->conf_state |= L2CAP_CONF_STATE2_DEVICE;
+		if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask))
+			return -ECONNREFUSED;
+		break;
+	default:
+		pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask);
+		break;
+	}
+
+done:
+	if (pi->mode != rfc.mode) {
+		result = L2CAP_CONF_UNACCEPT;
+		rfc.mode = pi->mode;
+
+		if (pi->num_conf_rsp == 1)
+			return -ECONNREFUSED;
+
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+					sizeof(rfc), (unsigned long) &rfc);
+	}
+
+
 	if (result == L2CAP_CONF_SUCCESS) {
 		/* Configure output options and let the other side know
 		 * which ones we don't like. */
 
-		if (rfc.mode == L2CAP_MODE_BASIC) {
-			if (mtu < pi->omtu)
-				result = L2CAP_CONF_UNACCEPT;
-			else {
-				pi->omtu = mtu;
-				pi->conf_state |= L2CAP_CONF_OUTPUT_DONE;
-			}
+		if (mtu < L2CAP_DEFAULT_MIN_MTU)
+			result = L2CAP_CONF_UNACCEPT;
+		else {
+			pi->omtu = mtu;
+			pi->conf_state |= L2CAP_CONF_MTU_DONE;
+		}
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu);
 
-			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu);
-		} else {
+		switch (rfc.mode) {
+		case L2CAP_MODE_BASIC:
+			pi->fcs = L2CAP_FCS_NONE;
+			pi->conf_state |= L2CAP_CONF_MODE_DONE;
+			break;
+
+		case L2CAP_MODE_ERTM:
+			pi->remote_tx_win = rfc.txwin_size;
+			pi->remote_max_tx = rfc.max_transmit;
+			pi->max_pdu_size = rfc.max_pdu_size;
+
+			rfc.retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
+			rfc.monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
+
+			pi->conf_state |= L2CAP_CONF_MODE_DONE;
+			break;
+
+		case L2CAP_MODE_STREAMING:
+			pi->remote_tx_win = rfc.txwin_size;
+			pi->max_pdu_size = rfc.max_pdu_size;
+
+			pi->conf_state |= L2CAP_CONF_MODE_DONE;
+			break;
+
+		default:
 			result = L2CAP_CONF_UNACCEPT;
 
 			memset(&rfc, 0, sizeof(rfc));
-			rfc.mode = L2CAP_MODE_BASIC;
-
-			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
-						sizeof(rfc), (unsigned long) &rfc);
+			rfc.mode = pi->mode;
 		}
-	}
 
+		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+					sizeof(rfc), (unsigned long) &rfc);
+
+		if (result == L2CAP_CONF_SUCCESS)
+			pi->conf_state |= L2CAP_CONF_OUTPUT_DONE;
+	}
 	rsp->scid   = cpu_to_le16(pi->dcid);
 	rsp->result = cpu_to_le16(result);
 	rsp->flags  = cpu_to_le16(0x0000);
+
+	return ptr - data;
+}
+
+static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result)
+{
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	struct l2cap_conf_req *req = data;
+	void *ptr = req->data;
+	int type, olen;
+	unsigned long val;
+	struct l2cap_conf_rfc rfc;
+
+	BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data);
+
+	while (len >= L2CAP_CONF_OPT_SIZE) {
+		len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val);
+
+		switch (type) {
+		case L2CAP_CONF_MTU:
+			if (val < L2CAP_DEFAULT_MIN_MTU) {
+				*result = L2CAP_CONF_UNACCEPT;
+				pi->omtu = L2CAP_DEFAULT_MIN_MTU;
+			} else
+				pi->omtu = val;
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu);
+			break;
+
+		case L2CAP_CONF_FLUSH_TO:
+			pi->flush_to = val;
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO,
+							2, pi->flush_to);
+			break;
+
+		case L2CAP_CONF_RFC:
+			if (olen == sizeof(rfc))
+				memcpy(&rfc, (void *)val, olen);
+
+			if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) &&
+							rfc.mode != pi->mode)
+				return -ECONNREFUSED;
+
+			pi->mode = rfc.mode;
+			pi->fcs = 0;
+
+			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+					sizeof(rfc), (unsigned long) &rfc);
+			break;
+		}
+	}
+
+	if (*result == L2CAP_CONF_SUCCESS) {
+		switch (rfc.mode) {
+		case L2CAP_MODE_ERTM:
+			pi->remote_tx_win   = rfc.txwin_size;
+			pi->retrans_timeout = rfc.retrans_timeout;
+			pi->monitor_timeout = rfc.monitor_timeout;
+			pi->max_pdu_size    = le16_to_cpu(rfc.max_pdu_size);
+			break;
+		case L2CAP_MODE_STREAMING:
+			pi->max_pdu_size    = le16_to_cpu(rfc.max_pdu_size);
+			break;
+		}
+	}
+
+	req->dcid   = cpu_to_le16(pi->dcid);
+	req->flags  = cpu_to_le16(0x0000);
 
 	return ptr - data;
 }
···
 
 		l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
 					l2cap_build_conf_req(sk, req), req);
+		l2cap_pi(sk)->num_conf_req++;
 		break;
 
 	case L2CAP_CR_PEND:
···
 
 	/* Complete config. */
 	len = l2cap_parse_conf_req(sk, rsp);
-	if (len < 0)
+	if (len < 0) {
+		l2cap_send_disconn_req(conn, sk);
 		goto unlock;
+	}
 
 	l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp);
+	l2cap_pi(sk)->num_conf_rsp++;
 
 	/* Reset config buffer. */
 	l2cap_pi(sk)->conf_len = 0;
···
 		goto unlock;
 
 	if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) {
+		if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV)
+				|| l2cap_pi(sk)->fcs != L2CAP_FCS_NONE)
+			l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16;
+
 		sk->sk_state = BT_CONNECTED;
+		l2cap_pi(sk)->next_tx_seq = 0;
+		l2cap_pi(sk)->expected_ack_seq = 0;
+		l2cap_pi(sk)->unacked_frames = 0;
+
+		setup_timer(&l2cap_pi(sk)->retrans_timer,
+				l2cap_retrans_timeout, (unsigned long) sk);
+		setup_timer(&l2cap_pi(sk)->monitor_timer,
+				l2cap_monitor_timeout, (unsigned long) sk);
+
+		__skb_queue_head_init(TX_QUEUE(sk));
+		__skb_queue_head_init(SREJ_QUEUE(sk));
 		l2cap_chan_ready(sk);
 		goto unlock;
 	}
···
 		u8 buf[64];
 		l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
 					l2cap_build_conf_req(sk, buf), buf);
+		l2cap_pi(sk)->num_conf_req++;
 	}
 
 unlock:
···
 		break;
 
 	case L2CAP_CONF_UNACCEPT:
-		if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) {
-			char req[128];
-			/* It does not make sense to adjust L2CAP parameters
-			 * that are currently defined in the spec. We simply
-			 * resend config request that we sent earlier. It is
-			 * stupid, but it helps qualification testing which
-			 * expects at least some response from us. */
-			l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
-						l2cap_build_conf_req(sk, req), req);
-			goto done;
+		if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) {
+			int len = cmd->len - sizeof(*rsp);
+			char req[64];
+
+			/* throw out any old stored conf requests */
+			result = L2CAP_CONF_SUCCESS;
+			len = l2cap_parse_conf_rsp(sk, rsp->data,
+							len, req, &result);
+			if (len < 0) {
+				l2cap_send_disconn_req(conn, sk);
+				goto done;
+			}
+
+			l2cap_send_cmd(conn, l2cap_get_ident(conn),
+						L2CAP_CONF_REQ, len, req);
+			l2cap_pi(sk)->num_conf_req++;
+			if (result != L2CAP_CONF_SUCCESS)
+				goto done;
+			break;
 		}
 
 	default:
 		sk->sk_state = BT_DISCONN;
 		sk->sk_err = ECONNRESET;
 		l2cap_sock_set_timer(sk, HZ * 5);
-		{
-			struct l2cap_disconn_req req;
-			req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid);
-			req.scid = cpu_to_le16(l2cap_pi(sk)->scid);
-			l2cap_send_cmd(conn, l2cap_get_ident(conn),
-					L2CAP_DISCONN_REQ, sizeof(req), &req);
-		}
+		l2cap_send_disconn_req(conn, sk);
 		goto done;
 	}
 
···
 	l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE;
 
 	if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) {
+		if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV)
+				|| l2cap_pi(sk)->fcs != L2CAP_FCS_NONE)
+			l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16;
+
 		sk->sk_state = BT_CONNECTED;
+		l2cap_pi(sk)->expected_tx_seq = 0;
+		l2cap_pi(sk)->buffer_seq = 0;
+		l2cap_pi(sk)->num_to_ack = 0;
+		__skb_queue_head_init(TX_QUEUE(sk));
+		__skb_queue_head_init(SREJ_QUEUE(sk));
 		l2cap_chan_ready(sk);
 	}
 
···
 
 	sk->sk_shutdown = SHUTDOWN_MASK;
 
+	skb_queue_purge(TX_QUEUE(sk));
+	skb_queue_purge(SREJ_QUEUE(sk));
+	del_timer(&l2cap_pi(sk)->retrans_timer);
+	del_timer(&l2cap_pi(sk)->monitor_timer);
+
 	l2cap_chan_del(sk, ECONNRESET);
 	bh_unlock_sock(sk);
 
···
 	if (!sk)
 		return 0;
 
+	skb_queue_purge(TX_QUEUE(sk));
+	skb_queue_purge(SREJ_QUEUE(sk));
+	del_timer(&l2cap_pi(sk)->retrans_timer);
+	del_timer(&l2cap_pi(sk)->monitor_timer);
+
 	l2cap_chan_del(sk, 0);
 	bh_unlock_sock(sk);
 
···
 
 	if (type == L2CAP_IT_FEAT_MASK) {
 		u8 buf[8];
+		u32 feat_mask = l2cap_feat_mask;
 		struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf;
 		rsp->type   = cpu_to_le16(L2CAP_IT_FEAT_MASK);
 		rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS);
-		put_unaligned(cpu_to_le32(l2cap_feat_mask), (__le32 *) rsp->data);
+		if (enable_ertm)
+			feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING
+							 | L2CAP_FEAT_FCS;
+		put_unaligned_le32(feat_mask, rsp->data);
 		l2cap_send_cmd(conn, cmd->ident,
 					L2CAP_INFO_RSP, sizeof(buf), buf);
 	} else if (type == L2CAP_IT_FIXED_CHAN) {
···
 	kfree_skb(skb);
 }
 
+static int l2cap_check_fcs(struct l2cap_pinfo *pi,  struct sk_buff *skb)
+{
+	u16 our_fcs, rcv_fcs;
+	int hdr_size = L2CAP_HDR_SIZE + 2;
+
+	if (pi->fcs == L2CAP_FCS_CRC16) {
+		skb_trim(skb, skb->len - 2);
+		rcv_fcs = get_unaligned_le16(skb->data + skb->len);
+		our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size);
+
+		if (our_fcs != rcv_fcs)
+			return -EINVAL;
+	}
+	return 0;
+}
+
+static void l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar)
+{
+	struct sk_buff *next_skb;
+
+	bt_cb(skb)->tx_seq = tx_seq;
+	bt_cb(skb)->sar = sar;
+
+	next_skb = skb_peek(SREJ_QUEUE(sk));
+	if (!next_skb) {
+		__skb_queue_tail(SREJ_QUEUE(sk), skb);
+		return;
+	}
+
+	do {
+		if (bt_cb(next_skb)->tx_seq > tx_seq) {
+			__skb_queue_before(SREJ_QUEUE(sk), next_skb, skb);
+			return;
+		}
+
+		if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb))
+			break;
+
+	} while((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb)));
+
+	__skb_queue_tail(SREJ_QUEUE(sk), skb);
+}
+
+static int l2cap_sar_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control)
+{
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	struct sk_buff *_skb;
+	int err = -EINVAL;
+
+	switch (control & L2CAP_CTRL_SAR) {
+	case L2CAP_SDU_UNSEGMENTED:
+		if (pi->conn_state & L2CAP_CONN_SAR_SDU) {
+			kfree_skb(pi->sdu);
+			break;
+		}
+
+		err = sock_queue_rcv_skb(sk, skb);
+		if (!err)
+			return 0;
+
+		break;
+
+	case L2CAP_SDU_START:
+		if (pi->conn_state & L2CAP_CONN_SAR_SDU) {
+			kfree_skb(pi->sdu);
+			break;
+		}
+
+		pi->sdu_len = get_unaligned_le16(skb->data);
+		skb_pull(skb, 2);
+
+		pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC);
+		if (!pi->sdu) {
+			err = -ENOMEM;
+			break;
+		}
+
+		memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
+
+		pi->conn_state |= L2CAP_CONN_SAR_SDU;
+		pi->partial_sdu_len = skb->len;
+		err = 0;
+		break;
+
+	case L2CAP_SDU_CONTINUE:
+		if (!(pi->conn_state & L2CAP_CONN_SAR_SDU))
+			break;
+
+		memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
+
+		pi->partial_sdu_len += skb->len;
+		if (pi->partial_sdu_len > pi->sdu_len)
+			kfree_skb(pi->sdu);
+		else
+			err = 0;
+
+		break;
+
+	case L2CAP_SDU_END:
+		if (!(pi->conn_state & L2CAP_CONN_SAR_SDU))
+			break;
+
+		memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
+
+		pi->conn_state &= ~L2CAP_CONN_SAR_SDU;
+		pi->partial_sdu_len += skb->len;
+
+		if (pi->partial_sdu_len == pi->sdu_len) {
+			_skb = skb_clone(pi->sdu, GFP_ATOMIC);
+			err = sock_queue_rcv_skb(sk, _skb);
+			if (err < 0)
+				kfree_skb(_skb);
+		}
+		kfree_skb(pi->sdu);
+		err = 0;
+
+		break;
+	}
+
+	kfree_skb(skb);
+	return err;
+}
+
+static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq)
+{
+	struct sk_buff *skb;
+	u16 control = 0;
+
+	while((skb = skb_peek(SREJ_QUEUE(sk)))) {
+		if (bt_cb(skb)->tx_seq != tx_seq)
+			break;
+
+		skb = skb_dequeue(SREJ_QUEUE(sk));
+		control |= bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT;
+		l2cap_sar_reassembly_sdu(sk, skb, control);
+		l2cap_pi(sk)->buffer_seq_srej =
+			(l2cap_pi(sk)->buffer_seq_srej + 1) % 64;
+		tx_seq++;
+	}
+}
+
+static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq)
+{
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	struct srej_list *l, *tmp;
+	u16 control;
+
+	list_for_each_entry_safe(l,tmp, SREJ_LIST(sk), list) {
+		if (l->tx_seq == tx_seq) {
+			list_del(&l->list);
+			kfree(l);
+			return;
+		}
+		control = L2CAP_SUPER_SELECT_REJECT;
+		control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT;
+		l2cap_send_sframe(pi, control);
+		list_del(&l->list);
+		list_add_tail(&l->list, SREJ_LIST(sk));
+	}
+}
+
+static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq)
+{
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	struct srej_list *new;
+	u16 control;
+
+	while (tx_seq != pi->expected_tx_seq) {
+		control = L2CAP_SUPER_SELECT_REJECT;
+		control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT;
+		if (pi->conn_state & L2CAP_CONN_SEND_PBIT) {
+			control |= L2CAP_CTRL_POLL;
+			pi->conn_state &= ~L2CAP_CONN_SEND_PBIT;
+		}
+		l2cap_send_sframe(pi, control);
+
+		new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC);
+		new->tx_seq = pi->expected_tx_seq++;
+		list_add_tail(&new->list, SREJ_LIST(sk));
+	}
+	pi->expected_tx_seq++;
+}
+
+static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb)
+{
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	u8 tx_seq = __get_txseq(rx_control);
+	u16 tx_control = 0;
+	u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT;
+	int err = 0;
+
+	BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len);
+
+	if (tx_seq == pi->expected_tx_seq)
+		goto expected;
+
+	if (pi->conn_state & L2CAP_CONN_SREJ_SENT) {
+		struct srej_list *first;
+
+		first = list_first_entry(SREJ_LIST(sk),
+				struct srej_list, list);
+		if (tx_seq == first->tx_seq) {
+			l2cap_add_to_srej_queue(sk, skb, tx_seq, sar);
+			l2cap_check_srej_gap(sk, tx_seq);
+
+			list_del(&first->list);
+			kfree(first);
+
+			if (list_empty(SREJ_LIST(sk))) {
+				pi->buffer_seq = pi->buffer_seq_srej;
+				pi->conn_state &= ~L2CAP_CONN_SREJ_SENT;
+			}
+		} else {
+			struct srej_list *l;
+			l2cap_add_to_srej_queue(sk, skb, tx_seq, sar);
+
+			list_for_each_entry(l, SREJ_LIST(sk), list) {
+				if (l->tx_seq == tx_seq) {
+					l2cap_resend_srejframe(sk, tx_seq);
+					return 0;
+				}
+			}
+			l2cap_send_srejframe(sk, tx_seq);
+		}
+	} else {
+		pi->conn_state |= L2CAP_CONN_SREJ_SENT;
+
+		INIT_LIST_HEAD(SREJ_LIST(sk));
+		pi->buffer_seq_srej = pi->buffer_seq;
+
+		__skb_queue_head_init(SREJ_QUEUE(sk));
+		l2cap_add_to_srej_queue(sk, skb, tx_seq, sar);
+
+		pi->conn_state |= L2CAP_CONN_SEND_PBIT;
+
+		l2cap_send_srejframe(sk, tx_seq);
+	}
+	return 0;
+
+expected:
+	pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64;
+
+	if (pi->conn_state & L2CAP_CONN_SREJ_SENT) {
+		l2cap_add_to_srej_queue(sk, skb, tx_seq, sar);
+		return 0;
+	}
+
+	pi->buffer_seq = (pi->buffer_seq + 1) % 64;
+
+	err = l2cap_sar_reassembly_sdu(sk, skb, rx_control);
+	if (err < 0)
+		return err;
+
+	pi->num_to_ack = (pi->num_to_ack + 1) % L2CAP_DEFAULT_NUM_TO_ACK;
+	if (pi->num_to_ack == L2CAP_DEFAULT_NUM_TO_ACK - 1) {
+		tx_control |= L2CAP_SUPER_RCV_READY;
+		tx_control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT;
+		l2cap_send_sframe(pi, tx_control);
+	}
+	return 0;
+}
+
+static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb)
+{
+	struct l2cap_pinfo *pi = l2cap_pi(sk);
+	u8 tx_seq = __get_reqseq(rx_control);
+
+	BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len);
+
+	switch (rx_control & L2CAP_CTRL_SUPERVISE) {
+	case L2CAP_SUPER_RCV_READY:
+		if (rx_control & L2CAP_CTRL_POLL) {
+			u16 control = L2CAP_CTRL_FINAL;
+			control |= L2CAP_SUPER_RCV_READY |
+				(pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT);
+			l2cap_send_sframe(l2cap_pi(sk), control);
+			pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
+
+		} else if (rx_control & L2CAP_CTRL_FINAL) {
+			pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
+			pi->expected_ack_seq = tx_seq;
+			l2cap_drop_acked_frames(sk);
+
+			if (!(pi->conn_state & L2CAP_CONN_WAIT_F))
+				break;
+
+			pi->conn_state &= ~L2CAP_CONN_WAIT_F;
+			del_timer(&pi->monitor_timer);
+
+			if (pi->unacked_frames > 0)
+				__mod_retrans_timer();
+		} else {
+			pi->expected_ack_seq = tx_seq;
+			l2cap_drop_acked_frames(sk);
+
+			if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY)
+					&& (pi->unacked_frames > 0))
+				__mod_retrans_timer();
+
+			l2cap_ertm_send(sk);
+			pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
+		}
+		break;
+
+	case L2CAP_SUPER_REJECT:
+		pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
+
+		pi->expected_ack_seq = __get_reqseq(rx_control);
+		l2cap_drop_acked_frames(sk);
+
+		sk->sk_send_head = TX_QUEUE(sk)->next;
+		pi->next_tx_seq = pi->expected_ack_seq;
+
+		l2cap_ertm_send(sk);
+
+		break;
+
+	case L2CAP_SUPER_SELECT_REJECT:
+		pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
+
+		if (rx_control & L2CAP_CTRL_POLL) {
+			l2cap_retransmit_frame(sk, tx_seq);
+			pi->expected_ack_seq = tx_seq;
+			l2cap_drop_acked_frames(sk);
+			l2cap_ertm_send(sk);
+			if (pi->conn_state & L2CAP_CONN_WAIT_F) {
+				pi->srej_save_reqseq = tx_seq;
+				pi->conn_state |= L2CAP_CONN_SREJ_ACT;
+			}
+		} else if (rx_control & L2CAP_CTRL_FINAL) {
+			if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) &&
+					pi->srej_save_reqseq == tx_seq)
+				pi->srej_save_reqseq &= ~L2CAP_CONN_SREJ_ACT;
+			else
+				l2cap_retransmit_frame(sk, tx_seq);
+		}
+		else {
+			l2cap_retransmit_frame(sk, tx_seq);
+			if (pi->conn_state & L2CAP_CONN_WAIT_F) {
+				pi->srej_save_reqseq = tx_seq;
+				pi->conn_state |= L2CAP_CONN_SREJ_ACT;
+			}
+		}
+		break;
+
+	case L2CAP_SUPER_RCV_NOT_READY:
+		pi->conn_state |= L2CAP_CONN_REMOTE_BUSY;
+		pi->expected_ack_seq = tx_seq;
+		l2cap_drop_acked_frames(sk);
+
+		del_timer(&l2cap_pi(sk)->retrans_timer);
+		if (rx_control & L2CAP_CTRL_POLL) {
+			u16 control = L2CAP_CTRL_FINAL;
+			l2cap_send_rr_or_rnr(l2cap_pi(sk), control);
+		}
+		break;
+	}
+
+	return 0;
+}
+
 static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb)
 {
 	struct sock *sk;
+	struct l2cap_pinfo *pi;
+	u16 control, len;
+	u8 tx_seq;
+	int err;
 
 	sk = l2cap_get_chan_by_scid(&conn->chan_list, cid);
 	if (!sk) {
···
 		goto drop;
 	}
 
+	pi = l2cap_pi(sk);
+
 	BT_DBG("sk %p, len %d", sk, skb->len);
 
 	if (sk->sk_state != BT_CONNECTED)
 		goto drop;
 
-	if (l2cap_pi(sk)->imtu < skb->len)
-		goto drop;
+	switch (pi->mode) {
+	case L2CAP_MODE_BASIC:
+		/* If socket recv buffers overflows we drop data here
+		 * which is *bad* because L2CAP has to be reliable.
+		 * But we don't have any other choice. L2CAP doesn't
+		 * provide flow control mechanism. */
 
-	/* If socket recv buffers overflows we drop data here
-	 * which is *bad* because L2CAP has to be reliable.
-	 * But we don't have any other choice. L2CAP doesn't
-	 * provide flow control mechanism. */
+		if (pi->imtu < skb->len)
+			goto drop;
 
-	if (!sock_queue_rcv_skb(sk, skb))
+		if (!sock_queue_rcv_skb(sk, skb))
+			goto done;
+		break;
+
+	case L2CAP_MODE_ERTM:
+		control = get_unaligned_le16(skb->data);
+		skb_pull(skb, 2);
+		len = skb->len;
+
+		if (__is_sar_start(control))
+			len -= 2;
+
+		if (pi->fcs == L2CAP_FCS_CRC16)
+			len -= 2;
+
+		/*
+		 * We can just drop the corrupted I-frame here.
+		 * Receiver will miss it and start proper recovery
+		 * procedures and ask retransmission.
+		 */
+		if (len > L2CAP_DEFAULT_MAX_PDU_SIZE)
+			goto drop;
+
+		if (l2cap_check_fcs(pi, skb))
+			goto drop;
+
+		if (__is_iframe(control))
+			err = l2cap_data_channel_iframe(sk, control, skb);
+		else
+			err = l2cap_data_channel_sframe(sk, control, skb);
+
+		if (!err)
+			goto done;
+		break;
+
+	case L2CAP_MODE_STREAMING:
+		control = get_unaligned_le16(skb->data);
+		skb_pull(skb, 2);
+		len = skb->len;
+
+		if (__is_sar_start(control))
+			len -= 2;
+
+		if (pi->fcs == L2CAP_FCS_CRC16)
+			len -= 2;
+
+		if (len > L2CAP_DEFAULT_MAX_PDU_SIZE || __is_sframe(control))
+			goto drop;
+
+		if (l2cap_check_fcs(pi, skb))
+			goto drop;
+
+		tx_seq = __get_txseq(control);
+
+		if (pi->expected_tx_seq == tx_seq)
+			pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64;
+		else
+			pi->expected_tx_seq = tx_seq + 1;
+
+		err = l2cap_sar_reassembly_sdu(sk, skb, control);
+
 		goto done;
+
+	default:
+		BT_DBG("sk %p: bad mode 0x%2.2x", sk, l2cap_pi(sk)->mode);
+		break;
+	}
 
 drop:
 	kfree_skb(skb);
···
 	cid = __le16_to_cpu(lh->cid);
 	len = __le16_to_cpu(lh->len);
 
+	if (len != skb->len) {
+		kfree_skb(skb);
+		return;
+	}
+
 	BT_DBG("len %d, cid 0x%4.4x", len, cid);
 
 	switch (cid) {
···
 		break;
 
 	case L2CAP_CID_CONN_LESS:
-		psm = get_unaligned((__le16 *) skb->data);
+		psm = get_unaligned_le16(skb->data);
 		skb_pull(skb, 2);
 		l2cap_conless_channel(conn, psm, skb);
 		break;
···
 
 module_init(l2cap_init);
 module_exit(l2cap_exit);
+
+module_param(enable_ertm, bool, 0644);
+MODULE_PARM_DESC(enable_ertm, "Enable enhanced retransmission mode");
 
 MODULE_AUTHOR("Marcel Holtmann <[e-mail]>");
 MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION);

net/bluetooth/rfcomm/core.c

···
 								auth_type);
 }
 
+static void rfcomm_session_timeout(unsigned long arg)
+{
+	struct rfcomm_session *s = (void *) arg;
+
+	BT_DBG("session %p state %ld", s, s->state);
+
+	set_bit(RFCOMM_TIMED_OUT, &s->flags);
+	rfcomm_session_put(s);
+	rfcomm_schedule(RFCOMM_SCHED_TIMEO);
+}
+
+static void rfcomm_session_set_timer(struct rfcomm_session *s, long timeout)
+{
+	BT_DBG("session %p state %ld timeout %ld", s, s->state, timeout);
+
+	if (!mod_timer(&s->timer, jiffies + timeout))
+		rfcomm_session_hold(s);
+}
+
+static void rfcomm_session_clear_timer(struct rfcomm_session *s)
+{
+	BT_DBG("session %p state %ld", s, s->state);
+
+	if (timer_pending(&s->timer) && del_timer(&s->timer))
+		rfcomm_session_put(s);
+}
+
 /* ---- RFCOMM DLCs ---- */
 static void rfcomm_dlc_timeout(unsigned long arg)
 {
···
 
 	rfcomm_session_hold(s);
 
+	rfcomm_session_clear_timer(s);
 	rfcomm_dlc_hold(d);
 	list_add(&d->list, &s->dlcs);
 	d->session = s;
···
 	list_del(&d->list);
 	d->session = NULL;
 	rfcomm_dlc_put(d);
+
+	if (list_empty(&s->dlcs))
+		rfcomm_session_set_timer(s, RFCOMM_IDLE_TIMEOUT);
 
 	rfcomm_session_put(s);
 }
···
 
 	BT_DBG("session %p sock %p", s, sock);
 
+	setup_timer(&s->timer, rfcomm_session_timeout, (unsigned long) s);
+
 	INIT_LIST_HEAD(&s->dlcs);
 	s->state = state;
 	s->sock  = sock;
···
 	if (state == BT_CONNECTED)
 		rfcomm_send_disc(s, 0);
 
+	rfcomm_session_clear_timer(s);
 	sock_release(s->sock);
 	kfree(s);
 
···
 		__rfcomm_dlc_close(d, err);
 	}
 
+	rfcomm_session_clear_timer(s);
 	rfcomm_session_put(s);
 }
 
···
 		struct rfcomm_session *s;
 		s = list_entry(p, struct rfcomm_session, list);
 
+		if (test_and_clear_bit(RFCOMM_TIMED_OUT, &s->flags)) {
+			s->state = BT_DISCONN;
+			rfcomm_send_disc(s, 0);
+			continue;
+		}
+
 		if (s->state == BT_LISTEN) {
 			rfcomm_accept_connection(s);
 			continue;
···
 /* ---- Initialization ---- */
 static int __init rfcomm_init(void)
 {
-	int ret;
+	int err;
 
 	l2cap_load();
 
···
 
 	rfcomm_thread = kthread_run(rfcomm_run, NULL, "krfcommd");
 	if (IS_ERR(rfcomm_thread)) {
-		ret = PTR_ERR(rfcomm_thread);
-		goto out_thread;
+		err = PTR_ERR(rfcomm_thread);
+		goto unregister;
 	}
 
 	if (class_create_file(bt_class, &class_attr_rfcomm_dlc) < 0)
 		BT_ERR("Failed to create RFCOMM info file");
 
-	ret = rfcomm_init_ttys();
-	if (ret)
-		goto out_tty;
+	err = rfcomm_init_ttys();
+	if (err < 0)
+		goto stop;
 
-	ret = rfcomm_init_sockets();
-	if (ret)
-		goto out_sock;
+	err = rfcomm_init_sockets();
+	if (err < 0)
+		goto cleanup;
 
 	BT_INFO("RFCOMM ver %s", VERSION);
 
 	return 0;
 
-out_sock:
+cleanup:
 	rfcomm_cleanup_ttys();
-out_tty:
+
+stop:
 	kthread_stop(rfcomm_thread);
-out_thread:
+
+unregister:
 	hci_unregister_cb(&rfcomm_cb);
 
-	return ret;
+	return err;
 }
 
 static void __exit rfcomm_exit(void)

net/bluetooth/sco.c

···
 	sock_put(sk);
 }
 
-/* Close socket.
- * Must be called on unlocked socket.
- */
-static void sco_sock_close(struct sock *sk)
+static void __sco_sock_close(struct sock *sk)
 {
-	struct sco_conn *conn;
-
-	sco_sock_clear_timer(sk);
-
-	lock_sock(sk);
-
-	conn = sco_pi(sk)->conn;
-
-	BT_DBG("sk %p state %d conn %p socket %p", sk, sk->sk_state, conn, sk->sk_socket);
+	BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
 
 	switch (sk->sk_state) {
 	case BT_LISTEN:
···
 		sock_set_flag(sk, SOCK_ZAPPED);
 		break;
 	}
+}
 
+/* Must be called on unlocked socket. */
+static void sco_sock_close(struct sock *sk)
+{
+	sco_sock_clear_timer(sk);
+	lock_sock(sk);
+	__sco_sock_close(sk);
 	release_sock(sk);
-
 	sco_sock_kill(sk);
 }
 
···
 	return err;
 }
 
+static int sco_sock_shutdown(struct socket *sock, int how)
+{
+	struct sock *sk = sock->sk;
+	int err = 0;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	lock_sock(sk);
+	if (!sk->sk_shutdown) {
+		sk->sk_shutdown = SHUTDOWN_MASK;
+		sco_sock_clear_timer(sk);
+		__sco_sock_close(sk);
+
+		if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
+			err = bt_sock_wait_state(sk, BT_CLOSED,
+							sk->sk_lingertime);
+	}
+	release_sock(sk);
+	return err;
+}
+
 static int sco_sock_release(struct socket *sock)
 {
 	struct sock *sk = sock->sk;
···
 	.ioctl		= bt_sock_ioctl,
 	.mmap		= sock_no_mmap,
 	.socketpair	= sock_no_socketpair,
-	.shutdown	= sock_no_shutdown,
+	.shutdown	= sco_sock_shutdown,
 	.setsockopt	= sco_sock_setsockopt,
 	.getsockopt	= sco_sock_getsockopt
 };