/
bluesleep.c
1596 lines (1339 loc) · 38.8 KB
/
bluesleep.c
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#if (defined(HUAWEI_BT_BTLA_VER30) && defined(CONFIG_HUAWEI_KERNEL))
/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
Copyright (C) 2006-2007 - Motorola
Copyright (c) 2008-2010, 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.
*/
#include <linux/module.h> /* kernel module definitions */
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/notifier.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/uaccess.h>
#include <linux/version.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/param.h>
#include <linux/bitops.h>
#include <linux/termios.h>
#include <mach/gpio.h>
#include <mach/msm_serial_hs.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h> /* event notifications */
#include "hci_uart.h"
#define BT_SLEEP_DBG
#ifndef BT_SLEEP_DBG
#define BT_DBG(fmt, arg...)
#endif
/*
* Defines
*/
#define VERSION "1.1"
#define PROC_DIR "bluetooth/sleep"
struct bluesleep_info {
unsigned host_wake;
unsigned ext_wake;
unsigned host_wake_irq;
struct uart_port *uport;
};
/* 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)
/* 1 second timeout */
#define TX_TIMER_INTERVAL 1
/* state variable names and bit positions */
#define BT_PROTO 0x01
#define BT_TXDATA 0x02
#define BT_ASLEEP 0x04
/* global pointer to a single hci device. */
static struct hci_dev *bluesleep_hdev;
static struct bluesleep_info *bsi;
/* module usage */
static atomic_t open_count = ATOMIC_INIT(1);
/*
* Local function prototypes
*/
static int bluesleep_hci_event(struct notifier_block *this,
unsigned long event, void *data);
/*
* Global variables
*/
/** Global state flags */
static unsigned long flags;
/** Tasklet to respond to change in hostwake line */
static struct tasklet_struct hostwake_task;
/** Transmission timer */
static struct timer_list tx_timer;
/** Lock for state transitions */
static spinlock_t rw_lock;
/** Notifier block for HCI events */
struct notifier_block hci_event_nblock = {
.notifier_call = bluesleep_hci_event,
};
struct proc_dir_entry *bluetooth_dir, *sleep_dir;
/*
* Local functions
*/
static void hsuart_power(int on)
{
if(NULL == bsi->uport)
{
BT_ERR("bsi->uport is null");
return;
}
if (on) {
msm_hs_request_clock_on(bsi->uport);
msm_hs_set_mctrl(bsi->uport, TIOCM_RTS);
} else {
msm_hs_set_mctrl(bsi->uport, 0);
msm_hs_request_clock_off(bsi->uport);
}
}
void bluesleep_uart_open(struct uart_port *uport)
{
BT_DBG("bluesleep_uart_open");
if(bsi->uport == NULL) {
BT_DBG("bluesleep_uart_open done");
bsi->uport = uport;
}
}
void bluesleep_uart_close(struct uart_port *uport)
{
BT_DBG("bluesleep_uart_close");
if(bsi->uport == uport) {
BT_DBG("bluesleep_uart_close done");
bsi->uport = NULL;
}
}
/**
* @return 1 if the Host can go to sleep, 0 otherwise.
*/
static inline int bluesleep_can_sleep(void)
{
/* check if MSM_WAKE_BT_GPIO and BT_WAKE_MSM_GPIO are both deasserted */
return gpio_get_value(bsi->ext_wake) &&
gpio_get_value(bsi->host_wake) &&
(bsi->uport != NULL);
}
void bluesleep_sleep_wakeup(void)
{
if (test_bit(BT_ASLEEP, &flags)) {
BT_DBG("waking up...");
/* Start the timer */
mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ));
gpio_set_value(bsi->ext_wake, 0);
clear_bit(BT_ASLEEP, &flags);
/*Activating UART */
hsuart_power(1);
}
#ifdef CONFIG_HUAWEI_KERNEL
else
{
/*Tx idle, Rx busy, we must also make host_wake asserted, that is low
* 1 means bt chip can sleep, in bluesleep.c
*/
/* Here we depend on the status of MSM gpio, for stability */
if(1 == gpio_get_value(bsi->ext_wake))
{
printk(KERN_ERR "-bluesleep_sleep_wakeup wakeup bt chip\n");
/*0 means wakup bt chip */
gpio_set_value(bsi->ext_wake, 0);
mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ));
}
}
#endif
}
/**
* @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 (msm_hs_tx_empty(bsi->uport)) {
BT_DBG("going to sleep...");
set_bit(BT_ASLEEP, &flags);
/*Deactivating UART */
hsuart_power(0);
} else {
mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ));
return;
}
} else if(gpio_get_value(bsi->ext_wake) && !test_bit(BT_ASLEEP, &flags)){
mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ));
gpio_set_value(bsi->ext_wake, 0);
} else {
bluesleep_sleep_wakeup();
}
}
/**
* A tasklet function that runs in tasklet context and reads the value
* of the HOST_WAKE GPIO pin and further defer the work.
* @param data Not used.
*/
static void bluesleep_hostwake_task(unsigned long data)
{
BT_DBG("hostwake line change");
spin_lock(&rw_lock);
if (gpio_get_value(bsi->host_wake))
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.
*/
void bluesleep_outgoing_data(void)
{
unsigned long irq_flags;
spin_lock_irqsave(&rw_lock, irq_flags);
/* log data passing by */
set_bit(BT_TXDATA, &flags);
/* if the tx side is sleeping... */
if (gpio_get_value(bsi->ext_wake)) {
BT_DBG("tx was sleeping");
bluesleep_sleep_wakeup();
}
spin_unlock_irqrestore(&rw_lock, irq_flags);
}
/**
* Handles HCI device events.
* @param this Not used.
* @param event The event that occurred.
* @param data The HCI device associated with the event.
* @return <code>NOTIFY_DONE</code>.
*/
static int bluesleep_hci_event(struct notifier_block *this,
unsigned long event, void *data)
{
struct hci_dev *hdev = (struct hci_dev *) data;
struct hci_uart *hu;
struct uart_state *state;
if (!hdev)
return NOTIFY_DONE;
switch (event) {
case HCI_DEV_REG:
if (!bluesleep_hdev) {
bluesleep_hdev = hdev;
hu = (struct hci_uart *) hdev->driver_data;
state = (struct uart_state *) hu->tty->driver_data;
bsi->uport = state->uart_port;
}
break;
case HCI_DEV_UNREG:
bluesleep_hdev = NULL;
bsi->uport = NULL;
break;
case HCI_DEV_WRITE:
bluesleep_outgoing_data();
break;
}
return NOTIFY_DONE;
}
/**
* Handles transmission timer expiration.
* @param data Not used.
*/
static void bluesleep_tx_timer_expire(unsigned long data)
{
unsigned long irq_flags;
spin_lock_irqsave(&rw_lock, irq_flags);
BT_DBG("Tx timer expired");
/* were we silent during the last timeout? */
if (!test_bit(BT_TXDATA, &flags)) {
BT_DBG("Tx has been idle");
gpio_set_value(bsi->ext_wake, 1);
bluesleep_tx_idle();
} else {
BT_DBG("Tx data during last period");
mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL*HZ));
}
/* clear the incoming data flag */
clear_bit(BT_TXDATA, &flags);
spin_unlock_irqrestore(&rw_lock, irq_flags);
}
/**
* Schedules a tasklet to run when receiving an interrupt on the
* <code>HOST_WAKE</code> GPIO pin.
* @param irq Not used.
* @param dev_id Not used.
*/
static irqreturn_t bluesleep_hostwake_isr(int irq, void *dev_id)
{
/* schedule a tasklet to handle the change in the host wake line */
tasklet_schedule(&hostwake_task);
return IRQ_HANDLED;
}
/**
* Starts the Sleep-Mode Protocol on the Host.
* @return On success, 0. On error, -1, and <code>errno</code> is set
* appropriately.
*/
static int bluesleep_start(void)
{
int retval;
unsigned long irq_flags;
spin_lock_irqsave(&rw_lock, irq_flags);
if (test_bit(BT_PROTO, &flags)) {
spin_unlock_irqrestore(&rw_lock, irq_flags);
return 0;
}
spin_unlock_irqrestore(&rw_lock, irq_flags);
if (!atomic_dec_and_test(&open_count)) {
atomic_inc(&open_count);
return -EBUSY;
}
/* start the timer */
mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL*HZ));
/* assert BT_WAKE */
gpio_set_value(bsi->ext_wake, 0);
/* add RISING condition to invoke MSM7230 to update the SLEEP FLAG */
#ifndef CONFIG_HUAWEI_KERNEL
retval = request_irq(bsi->host_wake_irq, bluesleep_hostwake_isr,
IRQF_DISABLED | IRQF_TRIGGER_FALLING,
"bluetooth hostwake", NULL);
#else
retval = request_irq(bsi->host_wake_irq, bluesleep_hostwake_isr,
IRQF_DISABLED | IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
"bluetooth hostwake", NULL);
#endif
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);
return 0;
fail:
del_timer(&tx_timer);
atomic_inc(&open_count);
return retval;
}
/**
* Stops the Sleep-Mode Protocol on the Host.
*/
static void bluesleep_stop(void)
{
unsigned long irq_flags;
spin_lock_irqsave(&rw_lock, irq_flags);
if (!test_bit(BT_PROTO, &flags)) {
spin_unlock_irqrestore(&rw_lock, irq_flags);
return;
}
/* assert BT_WAKE */
gpio_set_value(bsi->ext_wake, 0);
del_timer(&tx_timer);
clear_bit(BT_PROTO, &flags);
if (test_bit(BT_ASLEEP, &flags)) {
clear_bit(BT_ASLEEP, &flags);
hsuart_power(1);
}
atomic_inc(&open_count);
spin_unlock_irqrestore(&rw_lock, irq_flags);
if (disable_irq_wake(bsi->host_wake_irq))
BT_ERR("Couldn't disable hostwake IRQ wakeup mode\n");
free_irq(bsi->host_wake_irq, NULL);
}
/**
* Read the <code>BT_WAKE</code> GPIO pin value via the proc interface.
* When this function returns, <code>page</code> will contain a 1 if the
* pin is high, 0 otherwise.
* @param page Buffer for writing data.
* @param start Not used.
* @param offset Not used.
* @param count Not used.
* @param eof Whether or not there is more data to be read.
* @param data Not used.
* @return The number of bytes written.
*/
static int bluepower_read_proc_btwake(char *page, char **start, off_t offset,
int count, int *eof, void *data)
{
*eof = 1;
return sprintf(page, "btwake:%u\n", gpio_get_value(bsi->ext_wake));
}
/**
* Write the <code>BT_WAKE</code> GPIO pin value via the proc interface.
* @param file Not used.
* @param buffer The buffer to read from.
* @param count The number of bytes to be written.
* @param data Not used.
* @return On success, the number of bytes written. On error, -1, and
* <code>errno</code> is set appropriately.
*/
static int bluepower_write_proc_btwake(struct file *file, const char *buffer,
unsigned long count, void *data)
{
char *buf;
if (count < 1)
return -EINVAL;
buf = kmalloc(count, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, buffer, count)) {
kfree(buf);
return -EFAULT;
}
if (buf[0] == '0') {
gpio_set_value(bsi->ext_wake, 0);
} else if (buf[0] == '1') {
gpio_set_value(bsi->ext_wake, 1);
} else {
kfree(buf);
return -EINVAL;
}
kfree(buf);
return count;
}
/**
* Read the <code>BT_HOST_WAKE</code> GPIO pin value via the proc interface.
* When this function returns, <code>page</code> will contain a 1 if the pin
* is high, 0 otherwise.
* @param page Buffer for writing data.
* @param start Not used.
* @param offset Not used.
* @param count Not used.
* @param eof Whether or not there is more data to be read.
* @param data Not used.
* @return The number of bytes written.
*/
static int bluepower_read_proc_hostwake(char *page, char **start, off_t offset,
int count, int *eof, void *data)
{
*eof = 1;
return sprintf(page, "hostwake: %u \n", gpio_get_value(bsi->host_wake));
}
/**
* Read the low-power status of the Host via the proc interface.
* When this function returns, <code>page</code> contains a 1 if the Host
* is asleep, 0 otherwise.
* @param page Buffer for writing data.
* @param start Not used.
* @param offset Not used.
* @param count Not used.
* @param eof Whether or not there is more data to be read.
* @param data Not used.
* @return The number of bytes written.
*/
static int bluesleep_read_proc_asleep(char *page, char **start, off_t offset,
int count, int *eof, void *data)
{
unsigned int asleep;
asleep = test_bit(BT_ASLEEP, &flags) ? 1 : 0;
*eof = 1;
return sprintf(page, "asleep: %u\n", asleep);
}
/**
* Read the low-power protocol being used by the Host via the proc interface.
* When this function returns, <code>page</code> will contain a 1 if the Host
* is using the Sleep Mode Protocol, 0 otherwise.
* @param page Buffer for writing data.
* @param start Not used.
* @param offset Not used.
* @param count Not used.
* @param eof Whether or not there is more data to be read.
* @param data Not used.
* @return The number of bytes written.
*/
static int bluesleep_read_proc_proto(char *page, char **start, off_t offset,
int count, int *eof, void *data)
{
unsigned int proto;
proto = test_bit(BT_PROTO, &flags) ? 1 : 0;
*eof = 1;
return sprintf(page, "proto: %u\n", proto);
}
/**
* Modify the low-power protocol used by the Host via the proc interface.
* @param file Not used.
* @param buffer The buffer to read from.
* @param count The number of bytes to be written.
* @param data Not used.
* @return On success, the number of bytes written. On error, -1, and
* <code>errno</code> is set appropriately.
*/
static int bluesleep_write_proc_proto(struct file *file, const char *buffer,
unsigned long count, void *data)
{
char proto;
if (count < 1)
return -EINVAL;
if (copy_from_user(&proto, buffer, 1))
return -EFAULT;
if (proto == '0')
bluesleep_stop();
else
bluesleep_start();
/* claim that we wrote everything */
return count;
}
static int __init bluesleep_probe(struct platform_device *pdev)
{
int ret;
struct resource *res;
bsi = kzalloc(sizeof(struct bluesleep_info), GFP_KERNEL);
if (!bsi)
return -ENOMEM;
res = platform_get_resource_byname(pdev, IORESOURCE_IO,
"gpio_host_wake");
if (!res) {
BT_ERR("couldn't find host_wake gpio\n");
ret = -ENODEV;
goto free_bsi;
}
bsi->host_wake = res->start;
ret = gpio_request(bsi->host_wake, "bt_host_wake");
if (ret)
goto free_bsi;
ret = gpio_direction_input(bsi->host_wake);
if (ret)
goto free_bt_host_wake;
res = platform_get_resource_byname(pdev, IORESOURCE_IO,
"gpio_ext_wake");
if (!res) {
BT_ERR("couldn't find ext_wake gpio\n");
ret = -ENODEV;
goto free_bt_host_wake;
}
bsi->ext_wake = res->start;
ret = gpio_request(bsi->ext_wake, "bt_ext_wake");
if (ret)
goto free_bt_host_wake;
/* assert bt wake */
ret = gpio_direction_output(bsi->ext_wake, 0);
if (ret)
goto free_bt_ext_wake;
bsi->host_wake_irq = platform_get_irq_byname(pdev, "host_wake");
if (bsi->host_wake_irq < 0) {
BT_ERR("couldn't find host_wake irq\n");
ret = -ENODEV;
goto free_bt_ext_wake;
}
return 0;
free_bt_ext_wake:
gpio_free(bsi->ext_wake);
free_bt_host_wake:
gpio_free(bsi->host_wake);
free_bsi:
kfree(bsi);
return ret;
}
static int bluesleep_remove(struct platform_device *pdev)
{
/* assert bt wake */
gpio_set_value(bsi->ext_wake, 0);
if (test_bit(BT_PROTO, &flags)) {
if (disable_irq_wake(bsi->host_wake_irq))
BT_ERR("Couldn't disable hostwake IRQ wakeup mode \n");
free_irq(bsi->host_wake_irq, NULL);
del_timer(&tx_timer);
if (test_bit(BT_ASLEEP, &flags))
hsuart_power(1);
}
gpio_free(bsi->host_wake);
gpio_free(bsi->ext_wake);
kfree(bsi);
return 0;
}
static struct platform_driver bluesleep_driver = {
.remove = bluesleep_remove,
.driver = {
.name = "bluesleep",
.owner = THIS_MODULE,
},
};
/**
* Initializes the module.
* @return On success, 0. On error, -1, and <code>errno</code> is set
* appropriately.
*/
static int __init bluesleep_init(void)
{
int retval;
struct proc_dir_entry *ent;
BT_INFO("MSM Sleep Mode Driver Ver %s", VERSION);
retval = platform_driver_probe(&bluesleep_driver, bluesleep_probe);
if (retval)
return retval;
bluesleep_hdev = NULL;
bluetooth_dir = proc_mkdir("bluetooth", NULL);
if (bluetooth_dir == NULL) {
BT_ERR("Unable to create /proc/bluetooth directory");
return -ENOMEM;
}
sleep_dir = proc_mkdir("sleep", bluetooth_dir);
if (sleep_dir == NULL) {
BT_ERR("Unable to create /proc/%s directory", PROC_DIR);
return -ENOMEM;
}
/* Creating read/write "btwake" entry */
ent = create_proc_entry("btwake", 0, sleep_dir);
if (ent == NULL) {
BT_ERR("Unable to create /proc/%s/btwake entry", PROC_DIR);
retval = -ENOMEM;
goto fail;
}
ent->read_proc = bluepower_read_proc_btwake;
ent->write_proc = bluepower_write_proc_btwake;
/* read only proc entries */
if (create_proc_read_entry("hostwake", 0, sleep_dir,
bluepower_read_proc_hostwake, NULL) == NULL) {
BT_ERR("Unable to create /proc/%s/hostwake entry", PROC_DIR);
retval = -ENOMEM;
goto fail;
}
/* read/write proc entries */
ent = create_proc_entry("proto", 0, sleep_dir);
if (ent == NULL) {
BT_ERR("Unable to create /proc/%s/proto entry", PROC_DIR);
retval = -ENOMEM;
goto fail;
}
ent->read_proc = bluesleep_read_proc_proto;
ent->write_proc = bluesleep_write_proc_proto;
/* read only proc entries */
if (create_proc_read_entry("asleep", 0,
sleep_dir, bluesleep_read_proc_asleep, NULL) == NULL) {
BT_ERR("Unable to create /proc/%s/asleep entry", PROC_DIR);
retval = -ENOMEM;
goto fail;
}
flags = 0; /* clear all status bits */
/* Initialize spinlock. */
spin_lock_init(&rw_lock);
/* Initialize timer */
init_timer(&tx_timer);
tx_timer.function = bluesleep_tx_timer_expire;
tx_timer.data = 0;
/* initialize host wake tasklet */
tasklet_init(&hostwake_task, bluesleep_hostwake_task, 0);
hci_register_notifier(&hci_event_nblock);
return 0;
fail:
remove_proc_entry("asleep", sleep_dir);
remove_proc_entry("proto", sleep_dir);
remove_proc_entry("hostwake", sleep_dir);
remove_proc_entry("btwake", sleep_dir);
remove_proc_entry("sleep", bluetooth_dir);
remove_proc_entry("bluetooth", 0);
return retval;
}
/**
* Cleans up the module.
*/
static void __exit bluesleep_exit(void)
{
hci_unregister_notifier(&hci_event_nblock);
platform_driver_unregister(&bluesleep_driver);
remove_proc_entry("asleep", sleep_dir);
remove_proc_entry("proto", sleep_dir);
remove_proc_entry("hostwake", sleep_dir);
remove_proc_entry("btwake", sleep_dir);
remove_proc_entry("sleep", bluetooth_dir);
remove_proc_entry("bluetooth", 0);
}
module_init(bluesleep_init);
module_exit(bluesleep_exit);
MODULE_DESCRIPTION("Bluetooth Sleep Mode Driver ver %s " VERSION);
#ifdef MODULE_LICENSE
MODULE_LICENSE("GPL");
#endif
#endif
#if (defined(HUAWEI_BT_BLUEZ_VER30) || (!defined(CONFIG_HUAWEI_KERNEL)))
/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
Copyright (C) 2006-2007 - Motorola
Copyright (c) 2008-2010, 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.
*/
#include <linux/module.h> /* kernel module definitions */
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/notifier.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/uaccess.h>
#include <linux/version.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/param.h>
#include <linux/bitops.h>
#include <linux/termios.h>
#include <mach/gpio.h>
#include <mach/msm_serial_hs.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h> /* event notifications */
#include "hci_uart.h"
#define BT_SLEEP_DBG
#ifndef BT_SLEEP_DBG
#define BT_DBG(fmt, arg...)
#endif
/*
* Defines
*/
#define VERSION "1.1"
#define PROC_DIR "bluetooth/sleep"
struct bluesleep_info {
unsigned host_wake;
unsigned ext_wake;
unsigned host_wake_irq;
struct uart_port *uport;
};
/* 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)
/* 1 second timeout */
#define TX_TIMER_INTERVAL 1
/* state variable names and bit positions */
#define BT_PROTO 0x01
#define BT_TXDATA 0x02
#define BT_ASLEEP 0x04
/* global pointer to a single hci device. */
static struct hci_dev *bluesleep_hdev;
static struct bluesleep_info *bsi;
/* module usage */
static atomic_t open_count = ATOMIC_INIT(1);
/*
* Local function prototypes
*/
static int bluesleep_hci_event(struct notifier_block *this,
unsigned long event, void *data);
/*
* Global variables
*/
/** Global state flags */
static unsigned long flags;
/** Tasklet to respond to change in hostwake line */
static struct tasklet_struct hostwake_task;
/** Transmission timer */
static struct timer_list tx_timer;
/** Lock for state transitions */
static spinlock_t rw_lock;
/** Notifier block for HCI events */
struct notifier_block hci_event_nblock = {
.notifier_call = bluesleep_hci_event,
};
struct proc_dir_entry *bluetooth_dir, *sleep_dir;
/*
* Local functions
*/
static void hsuart_power(int on)
{
if(NULL == bsi->uport)
{
BT_ERR("bsi->uport is null");
return;
}
if (on) {
msm_hs_request_clock_on(bsi->uport);
msm_hs_set_mctrl(bsi->uport, TIOCM_RTS);
} else {
msm_hs_set_mctrl(bsi->uport, 0);
msm_hs_request_clock_off(bsi->uport);
}
}
/**
* @return 1 if the Host can go to sleep, 0 otherwise.
*/
static inline int bluesleep_can_sleep(void)
{
/* check if MSM_WAKE_BT_GPIO and BT_WAKE_MSM_GPIO are both deasserted */
return gpio_get_value(bsi->ext_wake) &&
gpio_get_value(bsi->host_wake) &&
(bsi->uport != NULL);
}
void bluesleep_sleep_wakeup(void)
{
if (test_bit(BT_ASLEEP, &flags)) {
BT_DBG("waking up...");
/* Start the timer */
mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ));
gpio_set_value(bsi->ext_wake, 0);
clear_bit(BT_ASLEEP, &flags);
/*Activating UART */
hsuart_power(1);
}
#ifdef CONFIG_HUAWEI_KERNEL
else
{
/*Tx idle, Rx busy, we must also make host_wake asserted, that is low
* 1 means bt chip can sleep, in bluesleep.c
*/
/* Here we depend on the status of MSM gpio, for stability */
if(1 == gpio_get_value(bsi->ext_wake))
{
printk(KERN_ERR "-bluesleep_sleep_wakeup wakeup bt chip\n");
/*0 means wakup bt chip */
gpio_set_value(bsi->ext_wake, 0);
mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ));
}
}
#endif
}