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firmware/br-ext-chip-allwinner/board/v83x/kernel/patches/00000-drivers_bluetooth_xra...

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diff -drupN a/drivers/bluetooth/xradio_btlpm.c b/drivers/bluetooth/xradio_btlpm.c
--- a/drivers/bluetooth/xradio_btlpm.c 1970-01-01 03:00:00.000000000 +0300
+++ b/drivers/bluetooth/xradio_btlpm.c 2022-06-12 05:28:14.000000000 +0300
@@ -0,0 +1,870 @@
+/*
+** 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 <linux/module.h>
+#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/param.h>
+#include <linux/bitops.h>
+#include <linux/termios.h>
+#include <linux/wakelock.h>
+#include <linux/gpio.h>
+#include <linux/sunxi-gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/serial_core.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <linux/pm_wakeirq.h>
+
+#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 = device_init_wakeup(dev, 1);
+ if (ret < 0) {
+ BT_ERR("device init wakeup failed\n");
+ goto free_bsi;
+ }
+ ret = dev_pm_set_wake_irq(dev, bsi->host_wake);
+ if (ret < 0) {
+ BT_ERR("can't enable wakeup src for bt_hostwake %d\n",
+ bsi->host_wake);
+ goto free_bsi;
+ }
+ 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);
+#ifdef XRADIO_ETF_RFKILL
+ remove_proc_entry("state", power_dir);
+ remove_proc_entry("power", bluetooth_dir);
+#endif
+ 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");
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