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#include <linux/sched.h>
#include <linux/module.h>
#include <linux/poll.h>
#include <linux/uaccess.h>
#include <asm/io.h>
#include <linux/fs.h>
#include <linux/semaphore.h>
#include <linux/cdev.h>
#include <linux/kfifo.h>
#include <linux/wakelock.h>
#include <linux/wait.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <emd_ctl.h>
/******************************************************************************************
* Macro definition region
******************************************************************************************/
#define DEVICE0_ID (0x0)
#define USER0_NAME "USB-Host"
#define DEVICE1_ID (0x1)
#define USER1_NAME "UART"
#define WAKEUP_EMD_USER_NUM (2)
/******************************************************************************************
* Data structure definition region
******************************************************************************************/
typedef struct _wakeup_ctl_info{
int dev_major_id;
int dev_sub_id;
int time_out_req_count;
int manual_req_count;
char *name;
}wakeup_ctl_info_t;
/******************************************************************************************
* Gloabal variables region
******************************************************************************************/
static wakeup_ctl_info_t wakeup_user[WAKEUP_EMD_USER_NUM]; // 0-USB, 1-UART
static void emd_wakeup_timer_cb(unsigned long);
static void emd_wdt_work_func(struct work_struct *data);
static DECLARE_WORK(emd_wdt_work, emd_wdt_work_func);
static DEFINE_TIMER(emd_wakeup_timer,emd_wakeup_timer_cb,0,0);
static unsigned int timeout_pending_count = 0;
static spinlock_t wakeup_ctl_lock;
static struct wake_lock emd_wake_lock; // Make sure WDT reset not to suspend
/******************************************************************************************
* External customization functions region
******************************************************************************************/
void request_wakeup_md_timeout(unsigned int dev_id, unsigned int dev_sub_id)
{
int i;
unsigned long flags;
for(i=0; i<WAKEUP_EMD_USER_NUM; i++){
if( (wakeup_user[i].dev_major_id == dev_id)
&&(wakeup_user[i].dev_sub_id == dev_sub_id) ){
spin_lock_irqsave(&wakeup_ctl_lock, flags);
wakeup_user[i].time_out_req_count++;
if(0 == timeout_pending_count){
cm_hold_wakeup_md_signal();
mod_timer(&emd_wakeup_timer, jiffies+2*HZ);
}
timeout_pending_count++;
if(timeout_pending_count > 2)
timeout_pending_count = 2;
spin_unlock_irqrestore(&wakeup_ctl_lock, flags);
break;
}
}
}
void request_wakeup_md(unsigned int dev_id, unsigned int dev_sub_id)
{
int i;
unsigned long flags;
for(i=0; i<WAKEUP_EMD_USER_NUM; i++){
if( (wakeup_user[i].dev_major_id == dev_id)
&&(wakeup_user[i].dev_sub_id == dev_sub_id) ){
spin_lock_irqsave(&wakeup_ctl_lock, flags);
if(wakeup_user[i].manual_req_count == 0)
cm_hold_wakeup_md_signal();
wakeup_user[i].manual_req_count++;
spin_unlock_irqrestore(&wakeup_ctl_lock, flags);
break;
}
}
}
void release_wakeup_md(unsigned int dev_id, unsigned int dev_sub_id)
{
int i;
unsigned long flags;
for(i=0; i<WAKEUP_EMD_USER_NUM; i++){
if( (wakeup_user[i].dev_major_id == dev_id)
&&(wakeup_user[i].dev_sub_id == dev_sub_id) ){
if(wakeup_user[i].manual_req_count == 0){
EMD_MSG_INF("chr","E: %s%d mis-match!\n",
wakeup_user[i].name, wakeup_user[i].dev_sub_id);
}else{
spin_lock_irqsave(&wakeup_ctl_lock, flags);
wakeup_user[i].manual_req_count--;
if(0 == timeout_pending_count){
timeout_pending_count++;
mod_timer(&emd_wakeup_timer, jiffies+HZ); // Let time to release
}
spin_unlock_irqrestore(&wakeup_ctl_lock, flags);
}
break;
}
}
}
static void emd_wakeup_timer_cb(unsigned long data __always_unused)
{
int release_wakeup_confirm = 1;
int i;
unsigned long flags;
spin_lock_irqsave(&wakeup_ctl_lock, flags);
// 1. Clear timeout counter
for(i=0; i<WAKEUP_EMD_USER_NUM; i++){
if(wakeup_user[i].time_out_req_count > 0){
wakeup_user[i].time_out_req_count=0;
}
}
// 2. Update timeout pending counter
if(timeout_pending_count == 0){
EMD_MSG_INF("chr","timeout_pending_count == 0\n");
}else{
timeout_pending_count--;
}
// 3. Check whether need to release wakeup signal
if(timeout_pending_count == 0){ // Need check whether to release
for(i=0; i<WAKEUP_EMD_USER_NUM; i++){
if(wakeup_user[i].manual_req_count > 0){
release_wakeup_confirm = 0;
break;
}
}
if(release_wakeup_confirm){
EMD_MSG_INF("chr","cm_release_wakeup_md_signal before\n");
cm_release_wakeup_md_signal();
}
}else{ // Need to run once more
mod_timer(&emd_wakeup_timer, jiffies+2*HZ);
}
spin_unlock_irqrestore(&wakeup_ctl_lock, flags);
}
static void reset_wakeup_control_logic(void)
{
int i;
unsigned long flags;
spin_lock_irqsave(&wakeup_ctl_lock, flags);
for(i=0; i<WAKEUP_EMD_USER_NUM; i++){
wakeup_user[i].time_out_req_count=0;
wakeup_user[i].manual_req_count = 0;
}
timeout_pending_count = 0;
spin_unlock_irqrestore(&wakeup_ctl_lock, flags);
}
static void emd_wdt_work_func(struct work_struct *data)
{
EMD_MSG_INF("chr","emd_wdt_work_func:Ext MD WDT rst!\n");
if(emd_request_reset()==0)
{
wake_lock_timeout(&emd_wake_lock, 15*HZ);
}
}
void ext_md_wdt_irq_cb(void)
{
EMD_MSG_INF("chr","ext_md_wdt_irq_cb:Ext MD WDT rst!\n");
cm_hold_rst_signal();
cm_do_md_power_off();
schedule_work(&emd_wdt_work);
}
void ext_md_wakeup_irq_cb(void)
{
EMD_MSG_INF("chr","Ext MD wake up request!\n");
wake_lock_timeout(&emd_wake_lock, 2*HZ);
cm_disable_ext_md_wakeup_irq();
}
void ext_md_exception_irq_cb(void)
{
EMD_MSG_INF("chr","TODO:Ext MD exception!\n");
if(emd_md_exception()==0)
{
wake_lock_timeout(&emd_wake_lock, 1*HZ);
}
}
void emd_spm_suspend(bool md_power_off)
{
EMD_MSG_INF("chr","emd_spm_suspend modem power off::%d\n", md_power_off);
cm_release_wakeup_md_signal();
if (md_power_off) {
cm_disable_ext_md_wakeup_irq();
} else {
cm_enable_ext_md_wakeup_irq();
}
del_timer(&emd_wakeup_timer);
reset_wakeup_control_logic();
}
void emd_spm_resume(void)
{
EMD_MSG_INF("chr","emd_spm_resume!\n");
cm_disable_ext_md_wakeup_irq();
}
int emd_spm_init(int md_id)
{
int ret=0, i;
int major,minor;
/* 2. Init t */
wake_lock_init(&emd_wake_lock, WAKE_LOCK_SUSPEND, "ext_md_wake_lock");
cm_gpio_setup();
/* 3. Init wake up ctl structure */
memset(wakeup_user, 0, sizeof(wakeup_user));
wakeup_user[0].dev_major_id = DEVICE0_ID;
wakeup_user[0].dev_sub_id = 0;
wakeup_user[0].name = USER0_NAME;
wakeup_user[1].dev_major_id = DEVICE1_ID;
wakeup_user[1].dev_sub_id = 1;
wakeup_user[1].name = USER1_NAME;
spin_lock_init(&wakeup_ctl_lock);
return 0;
}
void emd_spm_exit(int md_id)
{
wake_lock_destroy(&emd_wake_lock);
}
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