/* * * 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. * 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. * */ #define DEBUG #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) #include #endif #include #include #include #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0) #include #endif /* * #define BT_SLEEP_DBG */ #define BT_SLEEP_DBG #undef BT_DBG #undef BT_ERR #ifdef BT_SLEEP_DBG #define BT_DBG(fmt, arg...) pr_debug("[BT_LPM] %s: " fmt "\n",\ __func__, ## arg) #else #define BT_DBG(fmt, arg...) #endif #define BT_ERR(fmt, arg...) pr_debug("[BT_LPM] %s: " fmt "\n",\ __func__, ## arg) /* * Defines */ #define VERSION "1.3.3" #define PROC_DIR "bluetooth/sleep" #define DEFAULT_UART_INDEX 1 #define BT_BLUEDROID_SUPPORT 1 static int bluesleep_start(void); static void bluesleep_stop(void); struct bluesleep_info { unsigned int wakeup_enable; unsigned host_wake; unsigned ext_wake; unsigned host_wake_irq; #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) struct wakeup_source *ws; #else struct wake_lock wake_lock; #endif struct uart_port *uport; unsigned host_wake_assert:1; unsigned ext_wake_assert:1; struct platform_device *pdev; }; /* work function */ static void bluesleep_sleep_work(struct work_struct *work); static void bluesleep_tx_allow_sleep(void); /* 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) /* 1 second timeout */ #define RX_TIMER_INTERVAL 1 /* state variable names and bit positions */ #define BT_PROTO 0x01 #define BT_TXDATA 0x02 #define BT_ASLEEP 0x04 #define BT_RXTIMER 0x20 #define BT_TXIDLE 0x08 #if BT_BLUEDROID_SUPPORT static bool has_lpm_enabled; #else /* global pointer to a single hci device. */ static struct hci_dev *bluesleep_hdev; #endif #if BT_BLUEDROID_SUPPORT static struct platform_device *bluesleep_uart_dev; #endif static struct bluesleep_info *bsi; /* module usage */ static atomic_t open_count = ATOMIC_INIT(1); /* * Local function prototypes */ #if !BT_BLUEDROID_SUPPORT static int bluesleep_hci_event(struct notifier_block *this, unsigned long event, void *data); #endif /* * Global variables */ /** Global state flags */ static unsigned long flags; /** Tasklet to respond to change in hostwake line */ static struct tasklet_struct hostwake_task; /** Reception timer */ #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) static void bluesleep_rx_timer_expire(struct timer_list *t); #else static void bluesleep_rx_timer_expire(unsigned long data); #endif static struct timer_list rx_timer; /** Lock for state transitions */ static spinlock_t rw_lock; #if !BT_BLUEDROID_SUPPORT /** Notifier block for HCI events */ struct notifier_block hci_event_nblock = { .notifier_call = bluesleep_hci_event, }; #endif struct proc_dir_entry *bluetooth_dir, *sleep_dir; /* * Local functions */ /* * bt go to sleep will call this function tell uart stop data interactive */ static void hsuart_power(int on) { if (bsi->uport != NULL) { if (on) bsi->uport->ops->set_mctrl(bsi->uport, TIOCM_RTS); else bsi->uport->ops->set_mctrl(bsi->uport, 0); } else { BT_ERR("bsi->uport = NULL, has_lpm_enabled = %d", has_lpm_enabled); } } /** * @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 */ return (gpio_get_value(bsi->ext_wake) != bsi->ext_wake_assert) && (gpio_get_value(bsi->host_wake) != bsi->host_wake_assert) && (!test_bit(BT_RXTIMER, &flags)) && (bsi->uport != NULL); } /** * @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 (!has_lpm_enabled) return; if (bluesleep_can_sleep()) { /* already asleep, this is an error case */ if (test_bit(BT_ASLEEP, &flags)) { BT_DBG("already asleep"); return; } if (bsi->uport->ops->tx_empty(bsi->uport)) { BT_DBG("going to sleep..."); set_bit(BT_ASLEEP, &flags); /*Deactivating UART */ hsuart_power(0); #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) __pm_wakeup_event(bsi->ws, HZ / 2); #else wake_lock_timeout(&bsi->wake_lock, HZ / 2); #endif } else { BT_DBG("This should never happen.\n"); return; } } else if (test_bit(BT_ASLEEP, &flags)) { BT_DBG("hold wake locks for rx_task."); #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) __pm_stay_awake(bsi->ws); #else wake_lock(&bsi->wake_lock); #endif clear_bit(BT_ASLEEP, &flags); /* Add a timer to make sure that UART * would not be turned on&off very frequentently */ mod_timer(&rx_timer, jiffies + (RX_TIMER_INTERVAL * HZ)); set_bit(BT_RXTIMER, &flags); hsuart_power(1); } else { mod_timer(&rx_timer, jiffies + (RX_TIMER_INTERVAL * HZ)); if (gpio_get_value(bsi->ext_wake) != bsi->ext_wake_assert && !test_bit(BT_TXIDLE, &flags)) { BT_DBG("force retrigger bt wake:%lx", flags); gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert); msleep(20); gpio_set_value(bsi->ext_wake, !bsi->ext_wake_assert); } } } /** * 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->host_wake_assert) 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; int power_on_uart = 0; spin_lock_irqsave(&rw_lock, irq_flags); /* if the tx side is sleeping... */ if (gpio_get_value(bsi->ext_wake) != bsi->ext_wake_assert) { BT_DBG("tx was sleeping, wakeup it"); #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) __pm_stay_awake(bsi->ws); #else wake_lock(&bsi->wake_lock); #endif gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert); clear_bit(BT_ASLEEP, &flags); clear_bit(BT_TXIDLE, &flags); power_on_uart = 1; } spin_unlock_irqrestore(&rw_lock, irq_flags); if (power_on_uart == 1) hsuart_power(1); } #if BT_BLUEDROID_SUPPORT static struct uart_port *bluesleep_get_uart_port(void) { struct uart_port *uport = NULL; if (bluesleep_uart_dev) { uport = platform_get_drvdata(bluesleep_uart_dev); if (uport) BT_DBG( "%s get uart_port from blusleep_uart_dev: %s, port irq: %d", __func__, bluesleep_uart_dev->name, uport->irq); } return uport; } static int bluesleep_lpm_proc_show(struct seq_file *m, void *v) { seq_printf(m, "lpm enable: %d\n", has_lpm_enabled); return 0; } static int bluesleep_lpm_proc_open(struct inode *inode, struct file *file) { return single_open(file, bluesleep_lpm_proc_show, NULL); } static ssize_t bluesleep_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; if (b == '0') { /* HCI_DEV_UNREG */ bluesleep_stop(); has_lpm_enabled = false; bsi->uport = NULL; } else { /* HCI_DEV_REG */ if (!has_lpm_enabled) { has_lpm_enabled = true; if (bluesleep_uart_dev) bsi->uport = bluesleep_get_uart_port(); /* if bluetooth started, start bluesleep*/ bluesleep_start(); } } return count; } static int bluesleep_btwrite_proc_show(struct seq_file *m, void *v) { seq_puts(m, "it's not support\n"); return 0; } static int bluesleep_btwrite_proc_open(struct inode *inode, struct file *file) { return single_open(file, bluesleep_btwrite_proc_show, NULL); } static ssize_t bluesleep_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; /* HCI_DEV_WRITE */ if (b != '0') bluesleep_outgoing_data(); else bluesleep_tx_allow_sleep(); return count; } #if LINUX_VERSION_CODE > KERNEL_VERSION(5, 10, 0) static const struct proc_ops lpm_fops = { .proc_open = bluesleep_lpm_proc_open, .proc_read = seq_read, .proc_lseek = seq_lseek, .proc_release = single_release, .proc_write = bluesleep_write_proc_lpm, }; static const struct proc_ops btwrite_fops = { .proc_open = bluesleep_btwrite_proc_open, .proc_read = seq_read, .proc_lseek = seq_lseek, .proc_release = single_release, .proc_write = bluesleep_write_proc_btwrite, }; #else static const struct file_operations lpm_fops = { .owner = THIS_MODULE, .open = bluesleep_lpm_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = bluesleep_write_proc_lpm, }; static const struct file_operations btwrite_fops = { .owner = THIS_MODULE, .open = bluesleep_btwrite_proc_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .write = bluesleep_write_proc_btwrite, }; #endif #else /** * Handles HCI device events. * @param this Not used. * @param event The event that occurred. * @param data The HCI device associated with the event. * @return NOTIFY_DONE. */ 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; } break; case HCI_DEV_UNREG: bluesleep_hdev = NULL; bsi->uport = NULL; break; case HCI_DEV_WRITE: bluesleep_outgoing_data(); break; } return NOTIFY_DONE; } #endif /** * Function to check wheather bluetooth can sleep when btwrite was deasserted * by bluedroid. */ static void bluesleep_tx_allow_sleep(void) { unsigned long irq_flags; BT_DBG("Tx has been idle\n"); spin_lock_irqsave(&rw_lock, irq_flags); gpio_set_value(bsi->ext_wake, !bsi->ext_wake_assert); set_bit(BT_TXIDLE, &flags); bluesleep_tx_idle(); spin_unlock_irqrestore(&rw_lock, irq_flags); } /* Handles reception timer expiration. * Clear BT_RXTIMER. * @param data Not used. */ #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) static void bluesleep_rx_timer_expire(struct timer_list *t) #else static void bluesleep_rx_timer_expire(unsigned long data) #endif { BT_DBG("bluesleep_rx_timer_expire"); clear_bit(BT_RXTIMER, &flags); bluesleep_rx_idle(); } /** * Schedules a tasklet to run when receiving an interrupt on the * HOST_WAKE 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 errno 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(&rx_timer, jiffies + (RX_TIMER_INTERVAL*HZ)); /*deassert BT_WAKE first*/ gpio_set_value(bsi->ext_wake, !bsi->ext_wake_assert); msleep(20); /* assert BT_WAKE */ gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert); retval = request_irq(bsi->host_wake_irq, bluesleep_hostwake_isr, IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, "bluetooth hostwake", &bsi->pdev->dev); if (retval < 0) { BT_ERR("Couldn't acquire BT_HOST_WAKE IRQ"); goto fail; } set_bit(BT_PROTO, &flags); #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) __pm_stay_awake(bsi->ws); #else wake_lock(&bsi->wake_lock); #endif return 0; fail: del_timer(&rx_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 */ gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert); del_timer(&rx_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); free_irq(bsi->host_wake_irq, &bsi->pdev->dev); #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) __pm_wakeup_event(bsi->ws, HZ / 2); #else wake_lock_timeout(&bsi->wake_lock, HZ / 2); #endif } #if 0 /** * Read the BT_WAKE GPIO pin value via the proc interface. * When this function returns, page 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", (gpio_get_value(bsi->ext_wake) == bsi->ext_wake_assert)); } /** * Write the BT_WAKE 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 * errno 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') { gpio_set_value(bsi->ext_wake, !bsi->ext_wake_assert); } else if (buf[0] == '1') { gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert); } else { kfree(buf); return -EINVAL; } kfree(buf); return count; } /** * Read the BT_HOST_WAKE GPIO pin value via the proc interface. * When this function returns, page 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) == bsi->host_wake_assert)); } /** * Read the low-power status of the Host via the proc interface. * When this function returns, page 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, page 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 * errno 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; } #endif static int assert_level = -1; module_param(assert_level, int, S_IRUGO); MODULE_PARM_DESC(assert_level, "BT_LPM hostwake/btwake assert level"); #if 1 static struct platform_device *sw_uart_get_pdev(int id) { struct device_node *np; char match[20]; sprintf(match, "uart%d", id); np = of_find_node_by_type(NULL, match); return of_find_device_by_node(np); } #endif static int bluesleep_probe(struct platform_device *pdev) { #if 1 struct device_node *np = of_find_compatible_node(NULL, NULL, "allwinner,sunxi-btlpm"); struct device *dev = &pdev->dev; enum of_gpio_flags config; int ret, uart_index; u32 val; bsi = devm_kzalloc(&pdev->dev, sizeof(struct bluesleep_info), GFP_KERNEL); if (!bsi) return -ENOMEM; bsi->host_wake = of_get_named_gpio_flags(np, "bt_hostwake", 0, &config); if (!gpio_is_valid(bsi->host_wake)) { BT_ERR("get gpio bt_hostwake failed\n"); ret = -EINVAL; goto err0; } /* set host_wake_assert */ bsi->host_wake_assert = (config == OF_GPIO_ACTIVE_LOW) ? 0 : 1; BT_DBG("bt_hostwake gpio=%d assert=%d\n", bsi->host_wake, bsi->host_wake_assert); if (assert_level != -1) { bsi->host_wake_assert = (assert_level & 0x02) > 0; BT_DBG("override host_wake assert to %d", bsi->host_wake_assert); } ret = devm_gpio_request(dev, bsi->host_wake, "bt_hostwake"); if (ret < 0) { BT_ERR("can't request bt_hostwake gpio %d\n", bsi->host_wake); goto err0; } ret = gpio_direction_input(bsi->host_wake); if (ret < 0) { BT_ERR("can't request input direction bt_wake gpio %d\n", bsi->host_wake); goto err1; } #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0) if (!of_property_read_bool(np, "wakeup-source")) { #else if (!of_property_read_u32(np, "wakeup-source", &bsi->wakeup_enable) && (bsi->wakeup_enable == 0)) { #endif BT_DBG("wakeup source is disabled!\n"); } else { #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) ret = device_init_wakeup(dev, true); if (ret < 0) { BT_ERR("device init wakeup failed!\n"); goto err1; } ret = dev_pm_set_wake_irq(dev, gpio_to_irq(bsi->host_wake)); if (ret < 0) { BT_ERR("can't enable wakeup src for bt_hostwake %d\n", bsi->host_wake); goto err2; } bsi->wakeup_enable = 1; #else BT_ERR("%s kernel unsupport this feature!\r\n", __func__); #endif } bsi->ext_wake = of_get_named_gpio_flags(np, "bt_wake", 0, &config); if (!gpio_is_valid(bsi->ext_wake)) { BT_ERR("get gpio bt_wake failed\n"); ret = -EINVAL; goto err2; } ret = devm_gpio_request(dev, bsi->ext_wake, "bt_wake"); if (ret < 0) { BT_ERR("can't request bt_wake gpio %d\n", bsi->ext_wake); goto err2; } /* set ext_wake_assert */ bsi->ext_wake_assert = (config == OF_GPIO_ACTIVE_LOW) ? 0 : 1; BT_DBG("bt_wake gpio=%d assert=%d\n", bsi->ext_wake, bsi->ext_wake_assert); if (assert_level != -1) { bsi->ext_wake_assert = (assert_level & 0x01) > 0; BT_DBG("override ext_wake assert to %d", bsi->ext_wake_assert); } /* 1.set bt_wake as output and the level is assert, assert bt wake */ ret = gpio_direction_output(bsi->ext_wake, bsi->ext_wake_assert); if (ret < 0) { BT_ERR("can't request output direction bt_wake gpio %d\n", bsi->ext_wake); goto err3; } /*set ext_wake deassert as default*/ gpio_set_value(bsi->ext_wake, !bsi->ext_wake_assert); /* 2.get bt_host_wake gpio irq */ bsi->host_wake_irq = gpio_to_irq(bsi->host_wake); if (bsi->host_wake_irq < 0) { BT_ERR("map gpio [%d] to virq failed, errno = %d\n", bsi->host_wake, bsi->host_wake_irq); ret = -ENODEV; goto err3; } uart_index = DEFAULT_UART_INDEX; if (!of_property_read_u32(np, "uart_index", &val)) { switch (val) { case 0: case 1: case 2: uart_index = val; break; default: BT_ERR("unsupported uart_index (%u)\n", val); } } BT_DBG("uart_index (%u)\n", uart_index); bluesleep_uart_dev = sw_uart_get_pdev(uart_index); #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) #if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0) bsi->ws = wakeup_source_register(dev, "bluesleep"); #else bsi->ws = wakeup_source_register("bluesleep"); #endif #else wake_lock_init(&bsi->wake_lock, WAKE_LOCK_SUSPEND, "bluesleep"); #endif bsi->pdev = pdev; return 0; err3: devm_gpio_free(dev, bsi->ext_wake); err2: device_init_wakeup(dev, false); err1: devm_gpio_free(dev, bsi->host_wake); err0: devm_kfree(dev, bsi); BT_ERR("probe fail, err: %d", ret); return ret; #endif return 0; } static int bluesleep_remove(struct platform_device *pdev) { /* assert bt wake */ gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert); 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, &bsi->pdev->dev); del_timer(&rx_timer); if (test_bit(BT_ASLEEP, &flags)) hsuart_power(1); } gpio_free(bsi->host_wake); gpio_free(bsi->ext_wake); #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) wakeup_source_unregister(bsi->ws); #else wake_lock_destroy(&bsi->wake_lock); #endif #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) if (bsi->wakeup_enable) { BT_DBG("Deinit wakeup source"); device_init_wakeup(&pdev->dev, false); dev_pm_clear_wake_irq(&pdev->dev); } #else BT_ERR("%s kernel unsupport this feature!\r\n", __func__); #endif return 0; } /** * Initializes the module. * @return On success, 0. On error, -1, and errno is set * appropriately. */ int bluesleep_init(struct platform_device *pdev) { int retval; struct proc_dir_entry *ent; BT_DBG("BlueSleep Mode Driver Ver %s", VERSION); #if 1 retval = bluesleep_probe(pdev); if (retval) return retval; #endif #if !BT_BLUEDROID_SUPPORT bluesleep_hdev = NULL; #endif 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; } #if 0 /* 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", 0666, 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; } #endif #if BT_BLUEDROID_SUPPORT /* read/write proc entries */ ent = proc_create("lpm", 0660, sleep_dir, &lpm_fops); if (ent == NULL) { BT_ERR("Unable to create /proc/%s/lpm entry", PROC_DIR); retval = -ENOMEM; goto fail; } ent = proc_create("btwrite", 0660, sleep_dir, &btwrite_fops); if (ent == NULL) { BT_ERR("Unable to create /proc/%s/btwrite entry", PROC_DIR); retval = -ENOMEM; goto fail; } #endif flags = 0; /* clear all status bits */ /* Initialize spinlock. */ spin_lock_init(&rw_lock); /* Initialize timer */ #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) timer_setup(&rx_timer, bluesleep_rx_timer_expire, 0); #else init_timer(&rx_timer); rx_timer.function = bluesleep_rx_timer_expire; rx_timer.data = 0; #endif /* initialize host wake tasklet */ tasklet_init(&hostwake_task, bluesleep_hostwake_task, 0); #if !BT_BLUEDROID_SUPPORT hci_register_notifier(&hci_event_nblock); #endif return 0; fail: #if BT_BLUEDROID_SUPPORT remove_proc_entry("btwrite", sleep_dir); remove_proc_entry("lpm", sleep_dir); #endif #if 0 remove_proc_entry("asleep", sleep_dir); remove_proc_entry("proto", sleep_dir); remove_proc_entry("hostwake", sleep_dir); remove_proc_entry("btwake", sleep_dir); #endif remove_proc_entry("sleep", bluetooth_dir); remove_proc_entry("bluetooth", 0); return retval; } /** * Cleans up the module. */ int bluesleep_exit(struct platform_device *dev) { #if !BT_BLUEDROID_SUPPORT hci_unregister_notifier(&hci_event_nblock); #endif #if BT_BLUEDROID_SUPPORT remove_proc_entry("btwrite", sleep_dir); remove_proc_entry("lpm", sleep_dir); #endif #if 0 remove_proc_entry("asleep", sleep_dir); remove_proc_entry("proto", sleep_dir); remove_proc_entry("hostwake", sleep_dir); remove_proc_entry("btwake", sleep_dir); #endif remove_proc_entry("sleep", bluetooth_dir); remove_proc_entry("bluetooth", 0); bluesleep_remove(dev); return 0; }