ravenna-alsa-lkm-kernel-v5.patch

diff --git a/driver/module_timer.c b/driver/module_timer.c
index 5f64a8e..158d5ee 100644
--- a/driver/module_timer.c
+++ b/driver/module_timer.c
@@ -35,12 +35,61 @@
 #include "module_main.h"
 #include "module_timer.h"
 
-static struct tasklet_hrtimer my_hrtimer_;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,0,0)
+struct tasklet_hrtimer {
+	struct hrtimer		timer;
+	struct tasklet_struct	tasklet;
+	enum hrtimer_restart	(*function)(struct hrtimer *);
+};
+
+static inline
+void tasklet_hrtimer_cancel(struct tasklet_hrtimer *ttimer)
+{
+	hrtimer_cancel(&ttimer->timer);
+	tasklet_kill(&ttimer->tasklet);
+}
+
+static enum hrtimer_restart __hrtimer_tasklet_trampoline(struct hrtimer *timer)
+{
+	struct tasklet_hrtimer *ttimer =
+		container_of(timer, struct tasklet_hrtimer, timer);
+	tasklet_hi_schedule(&ttimer->tasklet);
+	return HRTIMER_NORESTART;
+}
+
+static void __tasklet_hrtimer_trampoline(unsigned long data)
+{
+	struct tasklet_hrtimer *ttimer = (void *)data;
+	enum hrtimer_restart restart;
+	restart = ttimer->function(&ttimer->timer);
+	if (restart != HRTIMER_NORESTART)
+		hrtimer_restart(&ttimer->timer);
+}
+
+void tasklet_hrtimer_init(struct tasklet_hrtimer *ttimer,
+			  enum hrtimer_restart (*function)(struct hrtimer *),
+			  clockid_t which_clock, enum hrtimer_mode mode)
+{
+	hrtimer_init(&ttimer->timer, which_clock, mode);
+	ttimer->timer.function = __hrtimer_tasklet_trampoline;
+	tasklet_init(&ttimer->tasklet, __tasklet_hrtimer_trampoline,
+		     (unsigned long)ttimer);
+	ttimer->function = function;
+}
+
+static inline
+void tasklet_hrtimer_start(struct tasklet_hrtimer *ttimer, ktime_t time,
+			   const enum hrtimer_mode mode)
+{
+	hrtimer_start(&ttimer->timer, time, mode);
+}
+#endif
+
 static uint64_t base_period_;
 static uint64_t max_period_allowed;
 static uint64_t min_period_allowed;
 static int stop_;
-
+static struct tasklet_hrtimer my_hrtimer_;
 
 enum hrtimer_restart timer_callback(struct hrtimer *timer)
 {
@@ -57,15 +106,15 @@ enum hrtimer_restart timer_callback(struct hrtimer *timer)
 
         if (now > next_wakeup)
         {
-            printk(KERN_INFO "Timer won't sleep, clock_timer is recall instantly\n");
+            //printk(KERN_INFO "Timer won't sleep, clock_timer is recall instantly\n");
             period = ktime_set(0, 0);
         }
         else if (ktime_to_ns(period) > max_period_allowed || ktime_to_ns(period) < min_period_allowed)
         {
-            printk(KERN_INFO "Timer period out of range: %lld [ms]. Target period = %lld\n", ktime_to_ns(period) / 1000000, base_period_ / 1000000);
+            //printk(KERN_INFO "Timer period out of range: %lld [ms]. Target period = %lld\n", ktime_to_ns(period) / 1000000, base_period_ / 1000000);
             if (ktime_to_ns(period) > (unsigned long)5E9L)
             {
-                printk(KERN_ERR "Timer period greater than 5s, set it to 1s!\n");
+                //printk(KERN_ERR "Timer period greater than 5s, set it to 1s!\n");
                 period = ktime_set(0,((unsigned long)1E9L)); //1s
             }
         }
@@ -80,8 +129,8 @@ enum hrtimer_restart timer_callback(struct hrtimer *timer)
     ///ret_overrun = hrtimer_forward(timer, kt_now, period);
     ret_overrun = hrtimer_forward_now(timer, period);
     // comment it when running in VM
-    if(ret_overrun > 1)
-        printk(KERN_INFO "Timer overrun ! (%d times)\n", ret_overrun);
+    /*if(ret_overrun > 1)
+        printk(KERN_INFO "Timer overrun ! (%d times)\n", ret_overrun);*/
     return HRTIMER_RESTART;
 
 }
@@ -89,15 +138,10 @@ enum hrtimer_restart timer_callback(struct hrtimer *timer)
 int init_clock_timer(void)
 {
     stop_ = 0;
-    ///hrtimer_init(&my_hrtimer_, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
-    tasklet_hrtimer_init(&my_hrtimer_, timer_callback, CLOCK_MONOTONIC/*_RAW*/, HRTIMER_MODE_PINNED/*HRTIMER_MODE_ABS*/);
-    ///my_hrtimer_.function = &timer_callback;
-
+    tasklet_hrtimer_init(&my_hrtimer_, timer_callback, CLOCK_MONOTONIC/*_RAW*/, HRTIMER_MODE_ABS /*HRTIMER_MODE_PINNED*/);
     //base_period_ = 100 * ((unsigned long)1E6L); // 100 ms
     base_period_ = 1333333; // 1.3 ms
     set_base_period(base_period_);
-
-    //start_clock_timer(); //used when no daemon
     return 0;
 }
 
@@ -108,24 +152,14 @@ void kill_clock_timer(void)
 
 int start_clock_timer(void)
 {
-    ktime_t period = ktime_set(0, base_period_); //100 ms
+    ktime_t period = ktime_set(0, base_period_);
     tasklet_hrtimer_start(&my_hrtimer_, period, HRTIMER_MODE_ABS);
-
     return 0;
 }
 
 void stop_clock_timer(void)
 {
-
     tasklet_hrtimer_cancel(&my_hrtimer_);
-    /*int ret_cancel = 0;
-    while(hrtimer_callback_running(&my_hrtimer_))
-        ++ret_cancel;
-
-    if(hrtimer_active(&my_hrtimer_) != 0)
-        ret_cancel = hrtimer_cancel(&my_hrtimer_);
-    if (hrtimer_is_queued(&my_hrtimer_) != 0)
-        ret_cancel = hrtimer_cancel(&my_hrtimer_);*/
 }
 
 void get_clock_time(uint64_t* clock_time)
@@ -145,4 +179,4 @@ void set_base_period(uint64_t base_period)
     min_period_allowed = base_period_ / 7;
     max_period_allowed = (base_period_ * 10) / 6;
     printk(KERN_INFO "Base period set to %lld ns\n", base_period_);
-}
\ No newline at end of file
+}