ALSA: Add new TLV types for dBwith min/max

[safe/jmp/linux-2.6] / sound / core / rtctimer.c

diff --git a/sound/core/rtctimer.c b/sound/core/rtctimer.c
index bd5d584..0851cd1 100644 (file)
--- a/sound/core/rtctimer.c
+++ b/sound/core/rtctimer.c
@@ -20,15 +20,12 @@
  *
  */
 
-#include <sound/driver.h>
 #include <linux/init.h>
-#include <linux/time.h>
-#include <linux/threads.h>
 #include <linux/interrupt.h>
 #include <linux/moduleparam.h>
+#include <linux/log2.h>
 #include <sound/core.h>
 #include <sound/timer.h>
-#include <sound/info.h>
 
 #if defined(CONFIG_RTC) || defined(CONFIG_RTC_MODULE)
 
@@ -40,17 +37,19 @@
 /*
  * prototypes
  */
-static int rtctimer_open(snd_timer_t *t);
-static int rtctimer_close(snd_timer_t *t);
-static int rtctimer_start(snd_timer_t *t);
-static int rtctimer_stop(snd_timer_t *t);
+static int rtctimer_open(struct snd_timer *t);
+static int rtctimer_close(struct snd_timer *t);
+static int rtctimer_start(struct snd_timer *t);
+static int rtctimer_stop(struct snd_timer *t);
 
 
 /*
  * The hardware dependent description for this timer.
  */
-static struct _snd_timer_hardware rtc_hw = {
-       .flags =        SNDRV_TIMER_HW_FIRST|SNDRV_TIMER_HW_AUTO,
+static struct snd_timer_hardware rtc_hw = {
+       .flags =        SNDRV_TIMER_HW_AUTO |
+                       SNDRV_TIMER_HW_FIRST |
+                       SNDRV_TIMER_HW_TASKLET,
        .ticks =        100000000L,             /* FIXME: XXX */
        .open =         rtctimer_open,
        .close =        rtctimer_close,
@@ -59,13 +58,13 @@ static struct _snd_timer_hardware rtc_hw = {
 };
 
 static int rtctimer_freq = RTC_FREQ;           /* frequency */
-static snd_timer_t *rtctimer;
-static atomic_t rtc_inc = ATOMIC_INIT(0);
+static struct snd_timer *rtctimer;
+static struct tasklet_struct rtc_tasklet;
 static rtc_task_t rtc_task;
 
 
 static int
-rtctimer_open(snd_timer_t *t)
+rtctimer_open(struct snd_timer *t)
 {
        int err;
 
@@ -77,47 +76,49 @@ rtctimer_open(snd_timer_t *t)
 }
 
 static int
-rtctimer_close(snd_timer_t *t)
+rtctimer_close(struct snd_timer *t)
 {
        rtc_task_t *rtc = t->private_data;
        if (rtc) {
                rtc_unregister(rtc);
+               tasklet_kill(&rtc_tasklet);
                t->private_data = NULL;
        }
        return 0;
 }
 
 static int
-rtctimer_start(snd_timer_t *timer)
+rtctimer_start(struct snd_timer *timer)
 {
        rtc_task_t *rtc = timer->private_data;
-       snd_assert(rtc != NULL, return -EINVAL);
+       if (snd_BUG_ON(!rtc))
+               return -EINVAL;
        rtc_control(rtc, RTC_IRQP_SET, rtctimer_freq);
        rtc_control(rtc, RTC_PIE_ON, 0);
-       atomic_set(&rtc_inc, 0);
        return 0;
 }
 
 static int
-rtctimer_stop(snd_timer_t *timer)
+rtctimer_stop(struct snd_timer *timer)
 {
        rtc_task_t *rtc = timer->private_data;
-       snd_assert(rtc != NULL, return -EINVAL);
+       if (snd_BUG_ON(!rtc))
+               return -EINVAL;
        rtc_control(rtc, RTC_PIE_OFF, 0);
        return 0;
 }
 
+static void rtctimer_tasklet(unsigned long data)
+{
+       snd_timer_interrupt((struct snd_timer *)data, 1);
+}
+
 /*
  * interrupt
  */
 static void rtctimer_interrupt(void *private_data)
 {
-       int ticks;
-
-       atomic_inc(&rtc_inc);
-       ticks = atomic_read(&rtc_inc);
-       snd_timer_interrupt((snd_timer_t*)private_data, ticks);
-       atomic_sub(ticks, &rtc_inc);
+       tasklet_schedule(private_data);
 }
 
 
@@ -126,17 +127,13 @@ static void rtctimer_interrupt(void *private_data)
  */
 static int __init rtctimer_init(void)
 {
-       int order, err;
-       snd_timer_t *timer;
+       int err;
+       struct snd_timer *timer;
 
-       if (rtctimer_freq < 2 || rtctimer_freq > 8192) {
-               snd_printk(KERN_ERR "rtctimer: invalid frequency %d\n", rtctimer_freq);
-               return -EINVAL;
-       }
-       for (order = 1; rtctimer_freq > order; order <<= 1)
-               ;
-       if (rtctimer_freq != order) {
-               snd_printk(KERN_ERR "rtctimer: invalid frequency %d\n", rtctimer_freq);
+       if (rtctimer_freq < 2 || rtctimer_freq > 8192 ||
+           !is_power_of_2(rtctimer_freq)) {
+               snd_printk(KERN_ERR "rtctimer: invalid frequency %d\n",
+                          rtctimer_freq);
                return -EINVAL;
        }
 
@@ -145,13 +142,16 @@ static int __init rtctimer_init(void)
        if (err < 0)
                return err;
 
+       timer->module = THIS_MODULE;
        strcpy(timer->name, "RTC timer");
        timer->hw = rtc_hw;
        timer->hw.resolution = NANO_SEC / rtctimer_freq;
 
+       tasklet_init(&rtc_tasklet, rtctimer_tasklet, (unsigned long)timer);
+
        /* set up RTC callback */
        rtc_task.func = rtctimer_interrupt;
-       rtc_task.private_data = timer;
+       rtc_task.private_data = &rtc_tasklet;
 
        err = snd_timer_global_register(timer);
        if (err < 0) {
@@ -166,7 +166,7 @@ static int __init rtctimer_init(void)
 static void __exit rtctimer_exit(void)
 {
        if (rtctimer) {
-               snd_timer_global_unregister(rtctimer);
+               snd_timer_global_free(rtctimer);
                rtctimer = NULL;
        }
 }