diff -drupN a/drivers/bluetooth/bcm_btlpm.c b/drivers/bluetooth/bcm_btlpm.c --- a/drivers/bluetooth/bcm_btlpm.c 1970-01-01 03:00:00.000000000 +0300 +++ b/drivers/bluetooth/bcm_btlpm.c 2022-06-12 05:28:14.000000000 +0300 @@ -0,0 +1,997 @@ +/* + * + * 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. + * + * + * Copyright (C) 2006-2007 - Motorola + * Copyright (c) 2008-2010, 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. + * + */ + +#define DEBUG + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include "hci_uart.h" + +#include "../tty/serial/sunxi-uart.h" + +/* + * #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_err("[BT_LPM] %s: " fmt "\n",\ + __func__, ## arg) + +/* + * Defines + */ + +#define VERSION "1.3" +#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 host_wake; + unsigned ext_wake; + unsigned host_wake_irq; + struct wake_lock wake_lock; + struct uart_port *uport; + unsigned host_wake_assert:1; + unsigned ext_wake_assert:1; +}; + +/* 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 + +#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 */ +static void bluesleep_rx_timer_expire(unsigned long data); +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; +extern int enable_gpio_wakeup_src(int para); + +/* + * Local functions + */ + +/* + * bt go to sleep will call this function tell uart stop data interactive + */ +static void hsuart_power(int on) +{ + 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 + */ + 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 (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); + wake_lock_timeout(&bsi->wake_lock, HZ / 2); + } else { + BT_DBG("This should never happen.\n"); + return; + } + } else if (test_bit(BT_ASLEEP, &flags)) { + wake_lock(&bsi->wake_lock); + 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 { + BT_DBG("do nothing\n"); + } +} + +/** + * 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"); + wake_lock(&bsi->wake_lock); + gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert); + clear_bit(BT_ASLEEP, &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; +} + +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, +}; +#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); + bluesleep_tx_idle(); + spin_unlock_irqrestore(&rw_lock, irq_flags); +} + + +/* Handles reception timer expiration. + * Clear BT_RXTIMER. + * @param data Not used. + */ +static void bluesleep_rx_timer_expire(unsigned long data) +{ + 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)); + + /* 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 | IRQF_NO_SUSPEND, + "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: + 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); + 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 / 2); +} +#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 __init 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, 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, (enum of_gpio_flags *)&config); + if (!gpio_is_valid(bsi->host_wake)) { + BT_ERR("get gpio bt_hostwake failed\n"); + return -EINVAL; + } + + BT_DBG( + "bt_hostwake gpio=%d mul-sel=%d pull=%d drv_level=%d data=%d\n", + config.gpio, + config.mul_sel, + config.pull, + config.drv_level, + config.data); + + /* set host_wake_assert */ + bsi->host_wake_assert = config.data; + + 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); + return ret; + } + 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); + return ret; + } + + 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; + } + + 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\n"); + return -EINVAL; + } + + BT_DBG( + "bt_wake gpio=%d mul-sel=%d pull=%d drv_level=%d data=%d\n", + config.gpio, + config.mul_sel, + config.pull, + config.drv_level, + config.data); + + 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); + return ret; + } + + /* set ext_wake_assert */ + bsi->ext_wake_assert = config.data; + + /* 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); + return ret; + } + + /* 2.get bt_host_wake gpio irq */ + 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; + return ret; + } + + 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); + + wake_lock_init(&bsi->wake_lock, WAKE_LOCK_SUSPEND, "bluesleep"); + 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, NULL); + del_timer(&rx_timer); + if (test_bit(BT_ASLEEP, &flags)) + hsuart_power(1); + } + + wake_lock_destroy(&bsi->wake_lock); + return 0; +} + +static const struct of_device_id sunxi_btlpm_ids[] = { + { .compatible = "allwinner,sunxi-btlpm" }, + { /* Sentinel */ } +}; + +static struct platform_driver bluesleep_driver = { + .remove = bluesleep_remove, + .driver = { + .owner = THIS_MODULE, + .name = "sunxi-btlpm", + .of_match_table = sunxi_btlpm_ids, + }, +}; + +/** + * Initializes the module. + * @return On success, 0. On error, -1, and errno is set + * appropriately. + */ +static int __init bluesleep_init(void) +{ + int retval; + struct proc_dir_entry *ent; + + BT_DBG("BlueSleep Mode Driver Ver %s", VERSION); + + retval = platform_driver_probe(&bluesleep_driver, bluesleep_probe); + if (retval) + return retval; + +#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 */ + init_timer(&rx_timer); + rx_timer.function = bluesleep_rx_timer_expire; + rx_timer.data = 0; + + /* 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. + */ +static void __exit bluesleep_exit(void) +{ +#if !BT_BLUEDROID_SUPPORT + hci_unregister_notifier(&hci_event_nblock); +#endif + platform_driver_unregister(&bluesleep_driver); + +#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); +} + +module_init(bluesleep_init); +module_exit(bluesleep_exit); + +MODULE_DESCRIPTION("Bluetooth Sleep Mode Driver ver %s " VERSION); +#ifdef MODULE_LICENSE +MODULE_LICENSE("GPL"); +#endif