Added missing tegra files.HEADmaster

1 files changed, 864 insertions, 0 deletions

diff --git a/drivers/bluetooth/bluesleep.c b/drivers/bluetooth/bluesleep.c
new file mode 100644
index 00000000000..0e2ec0befbe
--- /dev/null
+++ b/drivers/bluetooth/bluesleep.c
@@ -0,0 +1,864 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * Copyright (C) 2006-2007 - Motorola
+ * Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved.
+ *
+ *  Date         Author           Comment
+ * -----------  --------------   --------------------------------
+ * 2006-Apr-28  Motorola         The kernel module for running the Bluetooth(R)
+ *                               Sleep-Mode Protocol from the Host side
+ * 2006-Sep-08  Motorola         Added workqueue for handling sleep work.
+ * 2007-Jan-24  Motorola         Added mbm_handle_ioi() call to ISR.
+ * 2009-Aug-10  Motorola         Changed "add_timer" to "mod_timer" to solve
+ *                               race when flurry of queued work comes in.
+*/
+
+#include <linux/module.h>       /* kernel module definitions */
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/notifier.h>
+#include <linux/proc_fs.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <linux/uaccess.h>
+#include <linux/version.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+
+#include <linux/irq.h>
+#include <linux/ioport.h>
+#include <linux/param.h>
+#include <linux/bitops.h>
+#include <linux/termios.h>
+#include <linux/wakelock.h>
+#include <mach/gpio.h>
+#include <linux/serial_core.h>
+#include <linux/tegra_uart.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h> /* event notifications */
+#include "hci_uart.h"
+
+#define BT_SLEEP_DBG
+#ifndef BT_SLEEP_DBG
+#define BT_DBG(fmt, arg...)
+#endif
+/*
+ * Defines
+ */
+
+#define VERSION  "1.1"
+#define PROC_DIR        "bluetooth/sleep"
+
+#define POLARITY_LOW 0
+#define POLARITY_HIGH 1
+
+/* enable/disable wake-on-bluetooth */
+#define BT_ENABLE_IRQ_WAKE 1
+
+struct bluesleep_info {
+        unsigned host_wake;
+        unsigned ext_wake;
+        unsigned host_wake_irq;
+        struct uart_port *uport;
+        struct wake_lock wake_lock;
+        int irq_polarity;
+        int has_ext_wake;
+};
+
+/* work function */
+static void bluesleep_sleep_work(struct work_struct *work);
+
+/* work queue */
+DECLARE_DELAYED_WORK(sleep_workqueue, bluesleep_sleep_work);
+
+/* Macros for handling sleep work */
+#define bluesleep_rx_busy()     schedule_delayed_work(&sleep_workqueue, 0)
+#define bluesleep_tx_busy()     schedule_delayed_work(&sleep_workqueue, 0)
+#define bluesleep_rx_idle()     schedule_delayed_work(&sleep_workqueue, 0)
+#define bluesleep_tx_idle()     schedule_delayed_work(&sleep_workqueue, 0)
+
+/* 10 second timeout */
+#define TX_TIMER_INTERVAL  10
+
+/* state variable names and bit positions */
+#define BT_PROTO         0x01
+#define BT_TXDATA        0x02
+#define BT_ASLEEP        0x04
+#define BT_EXT_WAKE     0x08
+#define BT_SUSPEND      0x10
+
+/* global pointer to a single hci device. */
+static struct hci_dev *bluesleep_hdev;
+
+static struct bluesleep_info *bsi;
+
+/* module usage */
+static atomic_t open_count = ATOMIC_INIT(1);
+
+/*
+ * Local function prototypes
+ */
+static int bluesleep_hci_event(struct notifier_block *this,
+                        unsigned long event, void *data);
+static int bluesleep_start(void);
+static void bluesleep_stop(void);
+
+/*
+ * Global variables
+ */
+/** Global state flags */
+static unsigned long flags;
+
+/** Tasklet to respond to change in hostwake line */
+static struct tasklet_struct hostwake_task;
+
+/** Transmission timer */
+static void bluesleep_tx_timer_expire(unsigned long data);
+static DEFINE_TIMER(tx_timer, bluesleep_tx_timer_expire, 0, 0);
+
+/** Lock for state transitions */
+static spinlock_t rw_lock;
+
+/** Notifier block for HCI events */
+struct notifier_block hci_event_nblock = {
+        .notifier_call = bluesleep_hci_event,
+};
+
+struct proc_dir_entry *bluetooth_dir, *sleep_dir;
+
+/*
+ * Local functions
+ */
+static void hsuart_power(int on)
+{
+        if (test_bit(BT_SUSPEND, &flags))
+                return;
+        if (on) {
+                tegra_uart_request_clock_on(bsi->uport);
+                tegra_uart_set_mctrl(bsi->uport, TIOCM_RTS);
+        } else {
+                tegra_uart_set_mctrl(bsi->uport, 0);
+                tegra_uart_request_clock_off(bsi->uport);
+        }
+}
+
+/**
+ * @return 1 if the Host can go to sleep, 0 otherwise.
+ */
+int bluesleep_can_sleep(void)
+{
+        /* check if WAKE_BT_GPIO and BT_WAKE_GPIO are both deasserted */
+        return ((gpio_get_value(bsi->host_wake) != bsi->irq_polarity) &&
+                (!test_bit(BT_EXT_WAKE, &flags)) &&
+                (bsi->uport != NULL));
+}
+
+void bluesleep_sleep_wakeup(void)
+{
+        if (test_bit(BT_ASLEEP, &flags)) {
+                BT_DBG("waking up...");
+                wake_lock(&bsi->wake_lock);
+                /* Start the timer */
+                mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ));
+                if (bsi->has_ext_wake == 1)
+                        gpio_set_value(bsi->ext_wake, 1);
+                set_bit(BT_EXT_WAKE, &flags);
+                clear_bit(BT_ASLEEP, &flags);
+                /*Activating UART */
+        }
+}
+
+/**
+ * @brief@  main sleep work handling function which update the flags
+ * and activate and deactivate UART ,check FIFO.
+ */
+static void bluesleep_sleep_work(struct work_struct *work)
+{
+        if (bluesleep_can_sleep()) {
+                /* already asleep, this is an error case */
+                if (test_bit(BT_ASLEEP, &flags)) {
+                        BT_DBG("already asleep");
+                        return;
+                }
+
+                if (tegra_uart_is_tx_empty(bsi->uport)) {
+                        BT_DBG("going to sleep...");
+                        set_bit(BT_ASLEEP, &flags);
+                        /*Deactivating UART */
+                        /* UART clk is not turned off immediately. Release
+                         * wakelock after 500 ms.
+                         */
+                        wake_lock_timeout(&bsi->wake_lock, HZ / 2);
+                } else {
+                        mod_timer(&tx_timer, jiffies + TX_TIMER_INTERVAL * HZ);
+                        return;
+                }
+        } else if (!test_bit(BT_EXT_WAKE, &flags)
+                        && !test_bit(BT_ASLEEP, &flags)) {
+                mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ));
+                if (bsi->has_ext_wake == 1)
+                        gpio_set_value(bsi->ext_wake, 1);
+                set_bit(BT_EXT_WAKE, &flags);
+        } else {
+                bluesleep_sleep_wakeup();
+        }
+}
+
+/**
+ * A tasklet function that runs in tasklet context and reads the value
+ * of the HOST_WAKE GPIO pin and further defer the work.
+ * @param data Not used.
+ */
+static void bluesleep_hostwake_task(unsigned long data)
+{
+        BT_DBG("hostwake line change");
+
+        spin_lock(&rw_lock);
+        if ((gpio_get_value(bsi->host_wake) == bsi->irq_polarity))
+                bluesleep_rx_busy();
+        else
+                bluesleep_rx_idle();
+        spin_unlock(&rw_lock);
+
+}
+
+/**
+ * Handles proper timer action when outgoing data is delivered to the
+ * HCI line discipline. Sets BT_TXDATA.
+ */
+static void bluesleep_outgoing_data(void)
+{
+        unsigned long irq_flags;
+
+        spin_lock_irqsave(&rw_lock, irq_flags);
+        /* log data passing by */
+        set_bit(BT_TXDATA, &flags);
+        /* if the tx side is sleeping... */
+        if (!test_bit(BT_EXT_WAKE, &flags)) {
+                BT_DBG("tx was sleeping");
+                bluesleep_sleep_wakeup();
+        }
+        spin_unlock_irqrestore(&rw_lock, irq_flags);
+}
+
+/**
+ * Handles HCI device events.
+ * @param this Not used.
+ * @param event The event that occurred.
+ * @param data The HCI device associated with the event.
+ * @return <code>NOTIFY_DONE</code>.
+ */
+static int bluesleep_hci_event(struct notifier_block *this,
+                                unsigned long event, void *data)
+{
+        struct hci_dev *hdev = (struct hci_dev *) data;
+        struct hci_uart *hu;
+        struct uart_state *state;
+
+        if (!hdev)
+                return NOTIFY_DONE;
+
+        switch (event) {
+        case HCI_DEV_REG:
+                if (!bluesleep_hdev) {
+                        bluesleep_hdev = hdev;
+                        hu  = (struct hci_uart *) hdev->driver_data;
+                        state = (struct uart_state *) hu->tty->driver_data;
+                        bsi->uport = state->uart_port;
+                        /* if bluetooth started, start bluesleep*/
+                        bluesleep_start();
+                }
+                break;
+        case HCI_DEV_UNREG:
+                bluesleep_stop();
+                bluesleep_hdev = NULL;
+                bsi->uport = NULL;
+                /* if bluetooth stopped, stop bluesleep also */
+                break;
+        case HCI_DEV_WRITE:
+                bluesleep_outgoing_data();
+                break;
+        }
+
+        return NOTIFY_DONE;
+}
+
+/**
+ * Handles transmission timer expiration.
+ * @param data Not used.
+ */
+static void bluesleep_tx_timer_expire(unsigned long data)
+{
+        unsigned long irq_flags;
+
+        BT_DBG("Tx timer expired");
+
+        spin_lock_irqsave(&rw_lock, irq_flags);
+
+        /* were we silent during the last timeout? */
+        if (!test_bit(BT_TXDATA, &flags)) {
+                BT_DBG("Tx has been idle");
+                if (bsi->has_ext_wake == 1)
+                        gpio_set_value(bsi->ext_wake, 0);
+                clear_bit(BT_EXT_WAKE, &flags);
+                bluesleep_tx_idle();
+        } else {
+                BT_DBG("Tx data during last period");
+                mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL*HZ));
+        }
+
+        /* clear the incoming data flag */
+        clear_bit(BT_TXDATA, &flags);
+
+        spin_unlock_irqrestore(&rw_lock, irq_flags);
+}
+
+/**
+ * Schedules a tasklet to run when receiving an interrupt on the
+ * <code>HOST_WAKE</code> GPIO pin.
+ * @param irq Not used.
+ * @param dev_id Not used.
+ */
+static irqreturn_t bluesleep_hostwake_isr(int irq, void *dev_id)
+{
+        /* schedule a tasklet to handle the change in the host wake line */
+        tasklet_schedule(&hostwake_task);
+        return IRQ_HANDLED;
+}
+
+/**
+ * Starts the Sleep-Mode Protocol on the Host.
+ * @return On success, 0. On error, -1, and <code>errno</code> is set
+ * appropriately.
+ */
+static int bluesleep_start(void)
+{
+        int retval;
+        unsigned long irq_flags;
+
+        spin_lock_irqsave(&rw_lock, irq_flags);
+        if (test_bit(BT_PROTO, &flags)) {
+                spin_unlock_irqrestore(&rw_lock, irq_flags);
+                return 0;
+        }
+        spin_unlock_irqrestore(&rw_lock, irq_flags);
+
+        if (!atomic_dec_and_test(&open_count)) {
+                atomic_inc(&open_count);
+                return -EBUSY;
+        }
+
+        /* start the timer */
+        mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ));
+
+        /* assert BT_WAKE */
+        if (bsi->has_ext_wake == 1)
+                gpio_set_value(bsi->ext_wake, 1);
+        set_bit(BT_EXT_WAKE, &flags);
+#if BT_ENABLE_IRQ_WAKE
+        retval = enable_irq_wake(bsi->host_wake_irq);
+        if (retval < 0) {
+                BT_ERR("Couldn't enable BT_HOST_WAKE as wakeup interrupt");
+                goto fail;
+        }
+#endif
+        set_bit(BT_PROTO, &flags);
+        wake_lock(&bsi->wake_lock);
+        return 0;
+fail:
+        del_timer(&tx_timer);
+        atomic_inc(&open_count);
+
+        return retval;
+}
+
+/**
+ * Stops the Sleep-Mode Protocol on the Host.
+ */
+static void bluesleep_stop(void)
+{
+        unsigned long irq_flags;
+
+        spin_lock_irqsave(&rw_lock, irq_flags);
+        if (!test_bit(BT_PROTO, &flags)) {
+                spin_unlock_irqrestore(&rw_lock, irq_flags);
+                return;
+        }
+        /* assert BT_WAKE */
+        if (bsi->has_ext_wake == 1)
+                gpio_set_value(bsi->ext_wake, 1);
+        set_bit(BT_EXT_WAKE, &flags);
+        del_timer(&tx_timer);
+        clear_bit(BT_PROTO, &flags);
+
+        if (test_bit(BT_ASLEEP, &flags)) {
+                clear_bit(BT_ASLEEP, &flags);
+                hsuart_power(1);
+        }
+
+        atomic_inc(&open_count);
+        spin_unlock_irqrestore(&rw_lock, irq_flags);
+
+#if BT_ENABLE_IRQ_WAKE
+        if (disable_irq_wake(bsi->host_wake_irq))
+                BT_ERR("Couldn't disable hostwake IRQ wakeup mode\n");
+#endif
+        wake_lock_timeout(&bsi->wake_lock, HZ / 2);
+}
+/**
+ * Read the <code>BT_WAKE</code> GPIO pin value via the proc interface.
+ * When this function returns, <code>page</code> will contain a 1 if the
+ * pin is high, 0 otherwise.
+ * @param page Buffer for writing data.
+ * @param start Not used.
+ * @param offset Not used.
+ * @param count Not used.
+ * @param eof Whether or not there is more data to be read.
+ * @param data Not used.
+ * @return The number of bytes written.
+ */
+static int bluepower_read_proc_btwake(char *page, char **start, off_t offset,
+                                        int count, int *eof, void *data)
+{
+        *eof = 1;
+        return sprintf(page, "btwake:%u\n",test_bit(BT_EXT_WAKE, &flags));
+}
+
+/**
+ * Write the <code>BT_WAKE</code> GPIO pin value via the proc interface.
+ * @param file Not used.
+ * @param buffer The buffer to read from.
+ * @param count The number of bytes to be written.
+ * @param data Not used.
+ * @return On success, the number of bytes written. On error, -1, and
+ * <code>errno</code> is set appropriately.
+ */
+static int bluepower_write_proc_btwake(struct file *file, const char *buffer,
+                                        unsigned long count, void *data)
+{
+        char *buf;
+
+        if (count < 1)
+                return -EINVAL;
+
+        buf = kmalloc(count, GFP_KERNEL);
+        if (!buf)
+                return -ENOMEM;
+
+        if (copy_from_user(buf, buffer, count)) {
+                kfree(buf);
+                return -EFAULT;
+        }
+        if (buf[0] == '0') {
+                if (bsi->has_ext_wake == 1)
+                        gpio_set_value(bsi->ext_wake, 0);
+                clear_bit(BT_EXT_WAKE, &flags);
+        } else if (buf[0] == '1') {
+                if (bsi->has_ext_wake == 1)
+                        gpio_set_value(bsi->ext_wake, 1);
+                set_bit(BT_EXT_WAKE, &flags);
+        } else {
+                kfree(buf);
+                return -EINVAL;
+        }
+
+        kfree(buf);
+        return count;
+}
+
+/**
+ * Read the <code>BT_HOST_WAKE</code> GPIO pin value via the proc interface.
+ * When this function returns, <code>page</code> will contain a 1 if the pin
+ * is high, 0 otherwise.
+ * @param page Buffer for writing data.
+ * @param start Not used.
+ * @param offset Not used.
+ * @param count Not used.
+ * @param eof Whether or not there is more data to be read.
+ * @param data Not used.
+ * @return The number of bytes written.
+ */
+static int bluepower_read_proc_hostwake(char *page, char **start, off_t offset,
+                                        int count, int *eof, void *data)
+{
+        *eof = 1;
+        return sprintf(page, "hostwake: %u\n", gpio_get_value(bsi->host_wake));
+}
+
+
+/**
+ * Read the low-power status of the Host via the proc interface.
+ * When this function returns, <code>page</code> contains a 1 if the Host
+ * is asleep, 0 otherwise.
+ * @param page Buffer for writing data.
+ * @param start Not used.
+ * @param offset Not used.
+ * @param count Not used.
+ * @param eof Whether or not there is more data to be read.
+ * @param data Not used.
+ * @return The number of bytes written.
+ */
+static int bluesleep_read_proc_asleep(char *page, char **start, off_t offset,
+                                        int count, int *eof, void *data)
+{
+        unsigned int asleep;
+
+        asleep = test_bit(BT_ASLEEP, &flags) ? 1 : 0;
+        *eof = 1;
+        return sprintf(page, "asleep: %u\n", asleep);
+}
+
+/**
+ * Read the low-power protocol being used by the Host via the proc interface.
+ * When this function returns, <code>page</code> will contain a 1 if the Host
+ * is using the Sleep Mode Protocol, 0 otherwise.
+ * @param page Buffer for writing data.
+ * @param start Not used.
+ * @param offset Not used.
+ * @param count Not used.
+ * @param eof Whether or not there is more data to be read.
+ * @param data Not used.
+ * @return The number of bytes written.
+ */
+static int bluesleep_read_proc_proto(char *page, char **start, off_t offset,
+                                        int count, int *eof, void *data)
+{
+        unsigned int proto;
+
+        proto = test_bit(BT_PROTO, &flags) ? 1 : 0;
+        *eof = 1;
+        return sprintf(page, "proto: %u\n", proto);
+}
+
+/**
+ * Modify the low-power protocol used by the Host via the proc interface.
+ * @param file Not used.
+ * @param buffer The buffer to read from.
+ * @param count The number of bytes to be written.
+ * @param data Not used.
+ * @return On success, the number of bytes written. On error, -1, and
+ * <code>errno</code> is set appropriately.
+ */
+static int bluesleep_write_proc_proto(struct file *file, const char *buffer,
+                                        unsigned long count, void *data)
+{
+        char proto;
+
+        if (count < 1)
+                return -EINVAL;
+
+        if (copy_from_user(&proto, buffer, 1))
+                return -EFAULT;
+
+        if (proto == '0')
+                bluesleep_stop();
+        else
+                bluesleep_start();
+
+        /* claim that we wrote everything */
+        return count;
+}
+
+
+static int bluesleep_probe(struct platform_device *pdev)
+{
+        int ret;
+        struct resource *res;
+
+        bsi = kzalloc(sizeof(struct bluesleep_info), GFP_KERNEL);
+        if (!bsi)
+                return -ENOMEM;
+
+        res = platform_get_resource_byname(pdev, IORESOURCE_IO,
+                                "gpio_host_wake");
+        if (!res) {
+                BT_ERR("couldn't find host_wake gpio\n");
+                ret = -ENODEV;
+                goto free_bsi;
+        }
+        bsi->host_wake = res->start;
+
+        ret = gpio_request(bsi->host_wake, "bt_host_wake");
+        if (ret)
+                goto free_bsi;
+
+        /* configure host_wake as input */
+        ret = gpio_direction_input(bsi->host_wake);
+        if (ret < 0) {
+                pr_err("gpio-keys: failed to configure input"
+                                " direction for GPIO %d, error %d\n",
+                                bsi->host_wake, ret);
+                gpio_free(bsi->host_wake);
+                goto free_bsi;
+        }
+
+        res = platform_get_resource_byname(pdev, IORESOURCE_IO,
+                                "gpio_ext_wake");
+
+        if (!res)
+                bsi->has_ext_wake = 0;
+        else
+                bsi->has_ext_wake = 1;
+
+        if (bsi->has_ext_wake) {
+                bsi->ext_wake = res->start;
+                ret = gpio_request(bsi->ext_wake, "bt_ext_wake");
+                if (ret)
+                        goto free_bt_host_wake;
+
+                /* configure ext_wake as output mode*/
+                ret = gpio_direction_output(bsi->ext_wake, 1);
+                if (ret < 0) {
+                        pr_err("gpio-keys: failed to configure output"
+                                " direction for GPIO %d, error %d\n",
+                                  bsi->ext_wake, ret);
+                        gpio_free(bsi->ext_wake);
+                        goto free_bt_host_wake;
+                }
+        } else
+                set_bit(BT_EXT_WAKE, &flags);
+
+        res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
+                                                "host_wake");
+        if (!res) {
+                BT_ERR("couldn't find host_wake irq\n");
+                ret = -ENODEV;
+                goto free_bt_host_wake;
+        }
+        bsi->host_wake_irq = res->start;
+        if (bsi->host_wake_irq < 0) {
+                BT_ERR("couldn't find host_wake irq\n");
+                ret = -ENODEV;
+                goto free_bt_ext_wake;
+        }
+        if (res->flags & IORESOURCE_IRQ_LOWEDGE)
+                bsi->irq_polarity = POLARITY_LOW;/*low edge (falling edge)*/
+        else
+                bsi->irq_polarity = POLARITY_HIGH;/*anything else*/
+
+        wake_lock_init(&bsi->wake_lock, WAKE_LOCK_SUSPEND, "bluesleep");
+        clear_bit(BT_SUSPEND, &flags);
+
+        if (bsi->irq_polarity == POLARITY_LOW) {
+                ret = request_irq(bsi->host_wake_irq, bluesleep_hostwake_isr,
+                                IRQF_DISABLED | IRQF_TRIGGER_FALLING,
+                                "bluetooth hostwake", NULL);
+        } else {
+                ret = request_irq(bsi->host_wake_irq, bluesleep_hostwake_isr,
+                                IRQF_DISABLED | IRQF_TRIGGER_RISING,
+                                "bluetooth hostwake", NULL);
+        }
+        if (ret  < 0) {
+                BT_ERR("Couldn't acquire BT_HOST_WAKE IRQ");
+                goto free_bt_ext_wake;
+        }
+
+        return 0;
+
+free_bt_ext_wake:
+        gpio_free(bsi->ext_wake);
+free_bt_host_wake:
+        gpio_free(bsi->host_wake);
+free_bsi:
+        kfree(bsi);
+        return ret;
+}
+
+static int bluesleep_remove(struct platform_device *pdev)
+{
+        free_irq(bsi->host_wake_irq, NULL);
+        gpio_free(bsi->host_wake);
+        gpio_free(bsi->ext_wake);
+        wake_lock_destroy(&bsi->wake_lock);
+        kfree(bsi);
+        return 0;
+}
+
+
+static int bluesleep_resume(struct platform_device *pdev)
+{
+        if (test_bit(BT_SUSPEND, &flags)) {
+                BT_DBG("bluesleep resuming...\n");
+        if ((bsi->uport != NULL) &&
+                (gpio_get_value(bsi->host_wake) == bsi->irq_polarity)) {
+                        BT_DBG("bluesleep resume form BT event...\n");
+                        tegra_uart_request_clock_on(bsi->uport);
+                        tegra_uart_set_mctrl(bsi->uport, TIOCM_RTS);
+                }
+                clear_bit(BT_SUSPEND, &flags);
+        }
+        return 0;
+}
+
+static int bluesleep_suspend(struct platform_device *pdev, pm_message_t state)
+{
+        BT_DBG("bluesleep suspending...\n");
+        set_bit(BT_SUSPEND, &flags);
+        return 0;
+}
+
+static struct platform_driver bluesleep_driver = {
+        .probe = bluesleep_probe,
+        .remove = bluesleep_remove,
+        .suspend = bluesleep_suspend,
+        .resume = bluesleep_resume,
+        .driver = {
+                .name = "bluesleep",
+                .owner = THIS_MODULE,
+        },
+};
+/**
+ * Initializes the module.
+ * @return On success, 0. On error, -1, and <code>errno</code> is set
+ * appropriately.
+ */
+static int __init bluesleep_init(void)
+{
+        int retval;
+        struct proc_dir_entry *ent;
+
+        BT_INFO("BlueSleep Mode Driver Ver %s", VERSION);
+
+        retval = platform_driver_register(&bluesleep_driver);
+        if (retval)
+                return retval;
+
+        if (bsi == NULL)
+                return 0;
+
+        bluesleep_hdev = NULL;
+
+        bluetooth_dir = proc_mkdir("bluetooth", NULL);
+        if (bluetooth_dir == NULL) {
+                BT_ERR("Unable to create /proc/bluetooth directory");
+                return -ENOMEM;
+        }
+
+        sleep_dir = proc_mkdir("sleep", bluetooth_dir);
+        if (sleep_dir == NULL) {
+                BT_ERR("Unable to create /proc/%s directory", PROC_DIR);
+                return -ENOMEM;
+        }
+
+        /* Creating read/write "btwake" entry */
+        ent = create_proc_entry("btwake", 0, sleep_dir);
+        if (ent == NULL) {
+                BT_ERR("Unable to create /proc/%s/btwake entry", PROC_DIR);
+                retval = -ENOMEM;
+                goto fail;
+        }
+        ent->read_proc = bluepower_read_proc_btwake;
+        ent->write_proc = bluepower_write_proc_btwake;
+
+        /* read only proc entries */
+        if (create_proc_read_entry("hostwake", 0, sleep_dir,
+                                bluepower_read_proc_hostwake, NULL) == NULL) {
+                BT_ERR("Unable to create /proc/%s/hostwake entry", PROC_DIR);
+                retval = -ENOMEM;
+                goto fail;
+        }
+
+        /* read/write proc entries */
+        ent = create_proc_entry("proto", 0, sleep_dir);
+        if (ent == NULL) {
+                BT_ERR("Unable to create /proc/%s/proto entry", PROC_DIR);
+                retval = -ENOMEM;
+                goto fail;
+        }
+        ent->read_proc = bluesleep_read_proc_proto;
+        ent->write_proc = bluesleep_write_proc_proto;
+
+        /* read only proc entries */
+        if (create_proc_read_entry("asleep", 0,
+                        sleep_dir, bluesleep_read_proc_asleep, NULL) == NULL) {
+                BT_ERR("Unable to create /proc/%s/asleep entry", PROC_DIR);
+                retval = -ENOMEM;
+                goto fail;
+        }
+
+        flags = 0; /* clear all status bits */
+
+        /* Initialize spinlock. */
+        spin_lock_init(&rw_lock);
+
+        /* Initialize timer */
+        init_timer(&tx_timer);
+        tx_timer.function = bluesleep_tx_timer_expire;
+        tx_timer.data = 0;
+
+        /* initialize host wake tasklet */
+        tasklet_init(&hostwake_task, bluesleep_hostwake_task, 0);
+
+        /* assert bt wake */
+        if (bsi->has_ext_wake == 1)
+                gpio_set_value(bsi->ext_wake, 1);
+        set_bit(BT_EXT_WAKE, &flags);
+        hci_register_notifier(&hci_event_nblock);
+
+        return 0;
+
+fail:
+        remove_proc_entry("asleep", sleep_dir);
+        remove_proc_entry("proto", sleep_dir);
+        remove_proc_entry("hostwake", sleep_dir);
+        remove_proc_entry("btwake", sleep_dir);
+        remove_proc_entry("sleep", bluetooth_dir);
+        remove_proc_entry("bluetooth", 0);
+        return retval;
+}
+
+/**
+ * Cleans up the module.
+ */
+static void __exit bluesleep_exit(void)
+{
+        if (bsi == NULL)
+                return;
+
+        /* assert bt wake */
+        if (bsi->has_ext_wake == 1)
+                gpio_set_value(bsi->ext_wake, 1);
+        set_bit(BT_EXT_WAKE, &flags);
+        if (test_bit(BT_PROTO, &flags)) {
+                if (disable_irq_wake(bsi->host_wake_irq))
+                        BT_ERR("Couldn't disable hostwake IRQ wakeup mode\n");
+                free_irq(bsi->host_wake_irq, NULL);
+                del_timer(&tx_timer);
+                if (test_bit(BT_ASLEEP, &flags))
+                        hsuart_power(1);
+        }
+
+        hci_unregister_notifier(&hci_event_nblock);
+        platform_driver_unregister(&bluesleep_driver);
+
+        remove_proc_entry("asleep", sleep_dir);
+        remove_proc_entry("proto", sleep_dir);
+        remove_proc_entry("hostwake", sleep_dir);
+        remove_proc_entry("btwake", sleep_dir);
+        remove_proc_entry("sleep", bluetooth_dir);
+        remove_proc_entry("bluetooth", 0);
+}
+
+module_init(bluesleep_init);
+module_exit(bluesleep_exit);
+
+MODULE_DESCRIPTION("Bluetooth Sleep Mode Driver ver %s " VERSION);
+#ifdef MODULE_LICENSE
+MODULE_LICENSE("GPL");
+#endif
+