/* ** Bluetooth sleep and wakeup host interface for XRADIO Drivers ** ** Copyright (c) 2013, XRadio ** Author: XRadio ** ** 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define BT_SLEEP_DEBUG #ifdef BT_SLEEP_DEBUG #define BT_SLEEP_DBG(fmt, arg...) printk(KERN_DEBUG "[XR_BT_LPM] %s: " fmt "\n", __func__, ## arg) #else #define BT_SLEEP_DBG(fmt, arg...) #endif #define BT_SLEEP_INF(fmt, arg...) printk(KERN_INFO "[XR_BT_LPM] %s: " fmt "\n", __func__, ## arg) #define VERSION "01.00.06" #define PROC_SLEEP_DIR "bluetooth/sleep" #define PROC_POWER_DIR "bluetooth/power" #define BT_BLUEDROID_SUPPORT 1 #define AW1732_BT 1 #define XRADIO_ETF_RFKILL 1 struct xr_btsleep_info { unsigned int host_wake; unsigned int ext_wake; unsigned int host_wake_irq; struct wake_lock wake_lock; struct uart_port *uport; unsigned int host_wake_polarity:1; unsigned int bt_wake_polarity:1; }; /* 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) #define bluesleep_wake_up() schedule_delayed_work(&sleep_workqueue, 0) #define bluesleep_standby() schedule_delayed_work(&sleep_workqueue, 0) /* 10 second timeout */ #define TX_TIMER_INTERVAL 2 //10s /* state variable names and bit positions */ #define BT_PROTO 0x01 #define BT_TXDATA 0x02 #define BT_ASLEEP 0x04 /* variable use indicate lpm modle */ volatile bool has_lpm_enabled; /* struct use save platform_device from uart */ static struct platform_device *bluesleep_uart_dev; static struct xr_btsleep_info *bsi; /* Global state flags */ static unsigned long flags; #ifdef AW1732_BT /* module usage */ static atomic_t open_count = ATOMIC_INIT(1); /* Tasklet to respond to change in hostwake line */ static struct tasklet_struct hostwake_task; #endif /* Transmission timer */ static struct timer_list tx_timer; /* Lock for state transitions */ static spinlock_t rw_lock; static spinlock_t irq_lock; struct proc_dir_entry *bluetooth_dir, *sleep_dir; #ifdef XRADIO_ETF_RFKILL struct proc_dir_entry *power_dir; volatile char power_state_save; #endif /* * bt go to sleep will call this function tell uart stop data interactive */ static void hsuart_power(int on) { if (bsi->uport == NULL) { return; } if (on) { bsi->uport->ops->set_mctrl(bsi->uport, TIOCM_RTS); } else { bsi->uport->ops->set_mctrl(bsi->uport, 0); } } /** * @return 1 if the Host can go to sleep, 0 otherwise. */ static inline int bluesleep_can_sleep(void) { /* check if HOST_WAKE_BT_GPIO and BT_WAKE_HOST_GPIO are both deasserted */ int flag1, flag2; flag1 = !test_bit(BT_TXDATA, &flags); flag2 = (bsi->uport != NULL); BT_SLEEP_DBG(" !BT_TXDATA is %d, bsi->uport is %d", flag1, flag2); return (flag1 && flag2); } /* * after bt wakeup should clean BT_ASLEEP flag and start time. */ int bluesleep_sleep_wakeup(void) { int poll_count = 0; BT_SLEEP_DBG("test_bit(BT_ASLEEP, &flags) %d", test_bit(BT_ASLEEP, &flags)); if (gpio_get_value(bsi->ext_wake) != bsi->bt_wake_polarity || gpio_get_value(bsi->host_wake) != bsi->host_wake_polarity || test_bit(BT_ASLEEP, &flags) == 1) { BT_SLEEP_DBG("waking up..."); /*Activating UART */ hsuart_power(1); gpio_set_value(bsi->ext_wake, bsi->bt_wake_polarity); //add poll bsi->hostwake while (poll_count++ < 6) { mdelay(25); if (gpio_get_value(bsi->host_wake) == 1) { BT_SLEEP_DBG("bt device active"); /*wake up, maybe no data or cmd need send to fw*/ /*so didn't change TXDATA in here*/ clear_bit(BT_ASLEEP, &flags); return 0; } } /* *add once more wakeup operation when first operation failed, *because if host wakeup device during device is wakeuped by yourself, *device maybe couldn't receive wakeup GPIO rise-up signal */ poll_count = 0; while (poll_count++ < 6) { mdelay(25); if (gpio_get_value(bsi->host_wake) == 1) { BT_SLEEP_DBG("bt device active"); /*wake up, maybe no data or cmd need send to fw*/ /*so didn't change TXDATA in here*/ clear_bit(BT_ASLEEP, &flags); return 0; } } return 1; } else { BT_SLEEP_DBG("bluesleep_sleep_wakeup del_timer"); del_timer(&tx_timer); return 0; } return 1; } /** * @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_SLEEP_DBG("already asleep"); return; } if (bsi->uport->ops->tx_empty(bsi->uport)) { BT_SLEEP_DBG("going to sleep..."); gpio_set_value(bsi->ext_wake, !bsi->bt_wake_polarity); set_bit(BT_ASLEEP, &flags); clear_bit(BT_TXDATA, &flags); /*Deactivating UART */ hsuart_power(0); wake_unlock(&bsi->wake_lock); } } else { bluesleep_sleep_wakeup(); } } #ifdef AW1732_BT static void bluesleep_hostwake_task(unsigned long data) { BT_SLEEP_DBG("hostwake line change"); if (!has_lpm_enabled) { return; } spin_lock(&rw_lock); //wakeup signal from fw if (test_bit(BT_ASLEEP, &flags) && !test_bit(BT_TXDATA, &flags)) { clear_bit(BT_ASLEEP, &flags); mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ)); bluesleep_sleep_wakeup(); } spin_unlock(&rw_lock); } #endif static void bluesleep_outgoing_data(void) { unsigned long irq_flags; BT_SLEEP_DBG(); spin_lock_irqsave(&rw_lock, irq_flags); /* log data passing by */ set_bit(BT_TXDATA, &flags); /* if the tx side is sleeping... */ if (gpio_get_value(bsi->ext_wake) != bsi->bt_wake_polarity || gpio_get_value(bsi->host_wake) != bsi->host_wake_polarity) { BT_SLEEP_DBG("tx was sleeping"); if (bluesleep_sleep_wakeup() == 1) { BT_SLEEP_DBG("can't wakeup bt device!"); } } spin_unlock_irqrestore(&rw_lock, irq_flags); } static struct uart_port *bluesleep_get_uart_port(void) { struct uart_port *uport = NULL; BT_INFO("%s enter.", __func__); if (bluesleep_uart_dev) { uport = platform_get_drvdata(bluesleep_uart_dev); BT_INFO("%s get uart_port from blusleep_uart_dev: %s", __func__, bluesleep_uart_dev->name); } return uport; } #ifdef AW1732_BT static void bluesleep_tx_timer_expire(unsigned long data) { unsigned long irq_flags; spin_lock_irqsave(&rw_lock, irq_flags); BT_SLEEP_DBG("Tx timer expired"); /* were we silent during the last timeout */ if (!test_bit(BT_ASLEEP, &flags) && !test_bit(BT_TXDATA, &flags)) { BT_SLEEP_DBG("Tx has been idle"); bluesleep_tx_idle(); } else { BT_SLEEP_DBG("Tx data during last period"); } del_timer(&tx_timer); /* clear the incoming data flag */ spin_unlock_irqrestore(&rw_lock, irq_flags); } 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); wake_lock(&bsi->wake_lock); return IRQ_HANDLED; } 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; } /*wake up bt device ,initial irq service*/ gpio_set_value(bsi->ext_wake, bsi->bt_wake_polarity); if (bsi->host_wake_polarity) retval = request_irq(bsi->host_wake_irq, bluesleep_hostwake_isr, IRQF_NO_SUSPEND | IRQF_TRIGGER_RISING, "bluetooth hostwake", NULL); else retval = request_irq(bsi->host_wake_irq, bluesleep_hostwake_isr, IRQF_NO_SUSPEND | IRQF_TRIGGER_FALLING, "bluetooth hostwake", NULL); if (retval < 0) { BT_ERR("Couldn't acquire BT_HOST_WAKE IRQ"); goto fail; } retval = enable_irq_wake(bsi->host_wake_irq); if (retval < 0) { BT_ERR("Couldn't enable BT_HOST_WAKE as wakeup interrupt"); free_irq(bsi->host_wake_irq, NULL); goto fail; } set_bit(BT_PROTO, &flags); wake_lock(&bsi->wake_lock); return 0; fail: atomic_inc(&open_count); return retval; } 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; } clear_bit(BT_PROTO, &flags); del_timer(&tx_timer); if (test_bit(BT_ASLEEP, &flags)) { clear_bit(BT_ASLEEP, &flags); hsuart_power(1); } if (test_bit(BT_TXDATA, &flags)) { clear_bit(BT_TXDATA, &flags); } atomic_inc(&open_count); spin_unlock_irqrestore(&rw_lock, irq_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); wake_lock_timeout(&bsi->wake_lock, HZ * 5); } #endif #ifdef XRADIO_ETF_RFKILL extern void sunxi_bluetooth_set_power(bool on_off); static int bluetooth_pwr_proc_show(struct seq_file *m, void *v) { seq_printf(m, "power state: %d\n", power_state_save); return 0; } static int bluetooth_pwr_proc_open(struct inode *inode, struct file *file) { return single_open(file, bluetooth_pwr_proc_show, NULL); } static ssize_t bluetooth_write_proc_pwr(struct file *file, const char __user *buffer, size_t count, loff_t *pos) { char b; if (count < 1) return -EINVAL; if (copy_from_user(&b, buffer, 1)) return -EFAULT; if (b == '0') { BT_SLEEP_INF("bt power off"); //sunxi_bluetooth_set_power(false); power_state_save = 0; } else { BT_SLEEP_INF("bt power on"); //sunxi_bluetooth_set_power(true); power_state_save = 1; } return count; } #endif static int bluedroid_lpm_proc_show(struct seq_file *m, void *v) { seq_printf(m, "lpm enable: %d\n", has_lpm_enabled); return 0; } static int bluedroid_lpm_proc_open(struct inode *inode, struct file *file) { return single_open(file, bluedroid_lpm_proc_show, NULL); } static ssize_t bluedroid_write_proc_lpm(struct file *file, const char __user *buffer, size_t count, loff_t *pos) { char b; if (count < 1) return -EINVAL; if (copy_from_user(&b, buffer, 1)) return -EFAULT; #ifdef AW1732_BT if (b == '0') { BT_SLEEP_DBG("disable lpm mode"); bluesleep_stop(); has_lpm_enabled = false; bsi->uport = NULL; } else { BT_SLEEP_DBG("enable lpm mode"); if (!has_lpm_enabled) { has_lpm_enabled = true; if (bluesleep_uart_dev) bsi->uport = bluesleep_get_uart_port(); bluesleep_start(); } } #else //work around for aw1722 wakeup bt before brom download if (b == '0') { //disable lpm mode BT_SLEEP_DBG("disable lpm mode"); has_lpm_enabled = false; } else { //enable lpm mode BT_SLEEP_DBG("enable lpm mode"); has_lpm_enabled = true; if (bluesleep_uart_dev) bsi->uport = bluesleep_get_uart_port(); } #endif return count; } static int bluedroid_btwrite_proc_show(struct seq_file *m, void *v) { seq_printf(m, "it's not support\n"); return 0; } static int bluedroid_btwrite_proc_open(struct inode *inode, struct file *file) { return single_open(file, bluedroid_btwrite_proc_show, NULL); } static ssize_t bluedroid_write_proc_btwrite(struct file *file, const char __user *buffer, size_t count, loff_t *pos) { char b; if (count < 1) return -EINVAL; if (copy_from_user(&b, buffer, 1)) return -EFAULT; BT_SLEEP_DBG("bluedroid_write_proc_btwrite %c", b); if (b == '1') { mdelay(10); set_bit(BT_TXDATA, &flags); bluesleep_outgoing_data(); //start the timer when host receive event but reply no data or cmd send to fw del_timer(&tx_timer); } else if (b == '0') { clear_bit(BT_TXDATA, &flags); bluesleep_tx_idle(); } return count; } static int bluedroid_btwake_proc_show(struct seq_file *m, void *v) { seq_printf(m, "bt wake state:%d\n", gpio_get_value(bsi->ext_wake)); return 0; } static int bluedroid_btwake_proc_open(struct inode *inode, struct file *file) { return single_open(file, bluedroid_btwake_proc_show, NULL); } static ssize_t bluedroid_write_proc_btwake(struct file *file, const char __user *buffer, size_t count, loff_t *pos) { 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; } BT_SLEEP_DBG("bluedroid_write_proc_btwake %c", buf[0]); if (buf[0] == '0') { BT_SLEEP_DBG("bt sleeping"); gpio_set_value(bsi->ext_wake, !bsi->bt_wake_polarity); } else if (buf[0] == '1') { BT_SLEEP_DBG("wakeup bt device"); gpio_set_value(bsi->ext_wake, bsi->bt_wake_polarity); } else if (buf[0] == '2') { wake_lock(&bsi->wake_lock); } else if (buf[0] == '3') { wake_unlock(&bsi->wake_lock); } else { kfree(buf); return -EINVAL; } kfree(buf); return count; } #ifdef XRADIO_ETF_RFKILL static const struct file_operations pwr_fops = { .owner = THIS_MODULE, .open = bluetooth_pwr_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = bluetooth_write_proc_pwr, }; #endif static const struct file_operations lpm_fops = { .owner = THIS_MODULE, .open = bluedroid_lpm_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = bluedroid_write_proc_lpm, }; static const struct file_operations btwrite_fops = { .owner = THIS_MODULE, .open = bluedroid_btwrite_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = bluedroid_write_proc_btwrite, }; static const struct file_operations btwake_fops = { .owner = THIS_MODULE, .open = bluedroid_btwake_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = bluedroid_write_proc_btwake, }; extern struct platform_device *sw_uart_get_pdev(int uart_id); extern int enable_gpio_wakeup_src(int para); static int bluesleep_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct device *dev = &pdev->dev; struct gpio_config config; int ret; u32 val; bsi = devm_kzalloc(&pdev->dev, sizeof(struct xr_btsleep_info), GFP_KERNEL); if (!bsi) return -ENOMEM; //get bt_wake & bt_host_wake from sys_config.fex bsi->ext_wake = of_get_named_gpio_flags(np, "bt_wake", 0, (enum of_gpio_flags *)&config); if (!gpio_is_valid(bsi->ext_wake)) { BT_ERR("get gpio bt_wake failed"); return -EINVAL; } bsi->bt_wake_polarity = config.data; BT_SLEEP_DBG("bt_wake polarity: %d", bsi->bt_wake_polarity); ret = devm_gpio_request(dev, bsi->ext_wake, "bt_wake"); if (ret < 0) { BT_ERR("can't request bt_wake gpio %d", bsi->ext_wake); goto free_bsi; } ret = gpio_direction_output(bsi->ext_wake, bsi->bt_wake_polarity); if (ret < 0) { BT_ERR("can't request output direction bt_wake gpio %d", bsi->ext_wake); goto free_bsi; } bsi->host_wake = of_get_named_gpio_flags(np, "bt_hostwake", 0, (enum of_gpio_flags *)&config); if (!gpio_is_valid(bsi->host_wake)) { BT_ERR("get gpio bt_hostwake failed"); return -EINVAL; } bsi->host_wake_polarity = config.data; BT_SLEEP_DBG("host_wake polarity: %d", bsi->host_wake_polarity); ret = devm_gpio_request(dev, bsi->host_wake, "bt_hostwake"); if (ret < 0) { BT_ERR("can't request bt_hostwake gpio %d", bsi->host_wake); goto free_bsi; } ret = gpio_direction_input(bsi->host_wake); if (ret < 0) { BT_ERR("can't request input direction bt_wake gpio %d", bsi->host_wake); goto free_bsi; } ret = enable_gpio_wakeup_src(bsi->host_wake); if (ret < 0) { BT_ERR("can't enable wakeup src for bt_hostwake %d\n", bsi->host_wake); return ret; } if (!of_property_read_u32(np, "uart_index", &val)) { BT_SLEEP_DBG("uart_index(%u)", val); bluesleep_uart_dev = sw_uart_get_pdev(val); } wake_lock_init(&bsi->wake_lock, WAKE_LOCK_SUSPEND, "bluesleep"); //1.set bt_wake as output and the level is 0 gpio_set_value(bsi->ext_wake, 0); //2.get bt_host_wake gpio irq #ifdef AW1732_BT bsi->host_wake_irq = gpio_to_irq(bsi->host_wake); if (IS_ERR_VALUE(bsi->host_wake_irq)) { BT_ERR("map gpio [%d] to virq failed, errno = %d\n", bsi->host_wake, bsi->host_wake_irq); ret = -ENODEV; goto free_bt_ext_wake; } #endif return 0; #ifdef AW1732_BT free_bt_ext_wake: gpio_free(bsi->ext_wake); gpio_free(bsi->host_wake); #endif free_bsi: kfree(bsi); return ret; } static int bluesleep_remove(struct platform_device *pdev) { BT_SLEEP_DBG(); /* assert bt wake */ gpio_set_value(bsi->ext_wake, bsi->bt_wake_polarity); if (test_bit(BT_PROTO, &flags)) { #ifdef AW1732_BT free_irq(bsi->host_wake_irq, NULL); #endif del_timer(&tx_timer); if (test_bit(BT_ASLEEP, &flags)) hsuart_power(1); } gpio_free(bsi->host_wake); gpio_free(bsi->ext_wake); wake_lock_destroy(&bsi->wake_lock); return 0; } static int bluesleep_resume(struct platform_device *pdev) { BT_SLEEP_DBG(); if (!has_lpm_enabled) { return 0; } #if 0 //fix bug for always wakeup if (test_bit(BT_ASLEEP, &flags)) { mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL*HZ)); } bluesleep_sleep_wakeup(); #endif return 0; } static int bluesleep_suspend(struct platform_device *pdev, pm_message_t state) { BT_SLEEP_DBG(); if (!has_lpm_enabled) { return 0; } /*TXing DATA,if suspend will cause a error*/ if (test_bit(BT_TXDATA, &flags)) { return -EBUSY; } del_timer(&tx_timer); bluesleep_standby(); return 0; } static const struct of_device_id sunxi_btlpm_ids[] = { { .compatible = "allwinner,sunxi-btlpm" }, { /* Sentinel */ } }; static struct platform_driver bluesleep_driver = { .probe = bluesleep_probe, .remove = bluesleep_remove, .suspend = bluesleep_suspend, .resume = bluesleep_resume, .driver = { .owner = THIS_MODULE, .name = "sunxi-btlpm", .of_match_table = sunxi_btlpm_ids, }, }; static int __init btsleep_init(void) { int retval; struct proc_dir_entry *ent; BT_INFO("XRadio Bluetooth LPM Mode Driver Ver %s", VERSION); retval = platform_driver_probe(&bluesleep_driver, bluesleep_probe); if (retval) goto fail; bluetooth_dir = proc_mkdir("bluetooth", NULL); if (bluetooth_dir == NULL) { BT_ERR("Unable to create /proc/bluetooth directory"); goto unreg_drv; } sleep_dir = proc_mkdir("sleep", bluetooth_dir); if (sleep_dir == NULL) { BT_ERR("Unable to create /proc/%s directory", PROC_SLEEP_DIR); goto rm_bt_dir; } #ifdef XRADIO_ETF_RFKILL power_dir = proc_mkdir("power", bluetooth_dir); if (power_dir == NULL) { BT_ERR("Unable to create /proc/%s directory", PROC_POWER_DIR); goto rm_bt_dir; } /* read/write proc entries */ ent = proc_create("state", 0220, power_dir, &pwr_fops); if (ent == NULL) { BT_ERR("Unable to create /proc/%s/state entry", PROC_POWER_DIR); retval = -ENOMEM; goto rm_power_dir; } #endif /* read/write proc entries */ ent = proc_create("lpm", 0220, sleep_dir, &lpm_fops); if (ent == NULL) { BT_ERR("Unable to create /proc/%s/lpm entry", PROC_SLEEP_DIR); retval = -ENOMEM; goto rm_sleep_dir; } ent = proc_create("btwrite", 0220, sleep_dir, &btwrite_fops); if (ent == NULL) { BT_ERR("Unable to create /proc/%s/btwrite entry", PROC_SLEEP_DIR); retval = -ENOMEM; goto rm_btwrite_dir; } ent = proc_create("btwake", 0220, sleep_dir, &btwake_fops); if (ent == NULL) { BT_ERR("Unable to create /proc/%s/btwrite entry", PROC_SLEEP_DIR); retval = -ENOMEM; goto rm_btwake_dir; } #ifdef AW1732_BT flags = 0; /* Initialize spinlock. */ spin_lock_init(&rw_lock); spin_lock_init(&irq_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); #endif return 0; rm_btwake_dir: remove_proc_entry("btwake", sleep_dir); rm_btwrite_dir: remove_proc_entry("btwrite", sleep_dir); rm_sleep_dir: remove_proc_entry("sleep", bluetooth_dir); #ifdef XRADIO_ETF_RFKILL rm_power_dir: remove_proc_entry("state", power_dir); #endif rm_bt_dir: remove_proc_entry("bluetooth", 0); unreg_drv: platform_driver_unregister(&bluesleep_driver); fail: return retval; } static void __exit btsleep_exit(void) { platform_driver_unregister(&bluesleep_driver); remove_proc_entry("btwake", sleep_dir); remove_proc_entry("btwrite", sleep_dir); remove_proc_entry("lpm", sleep_dir); remove_proc_entry("sleep", bluetooth_dir); remove_proc_entry("bluetooth", 0); } module_init(btsleep_init); module_exit(btsleep_exit); MODULE_AUTHOR("XRadioTech"); MODULE_DESCRIPTION("Bluetooth Sleep Mode Driver ver. %s" VERSION); MODULE_LICENSE("GPL");