vserver 1.9.5.x5

[linux-2.6.git] / arch / ppc / 8xx_io / cs4218_tdm.c

diff --git a/arch/ppc/8xx_io/cs4218_tdm.c b/arch/ppc/8xx_io/cs4218_tdm.c
index 514e7de..be7cef1 100644 (file)
--- a/arch/ppc/8xx_io/cs4218_tdm.c
+++ b/arch/ppc/8xx_io/cs4218_tdm.c
@@ -55,6 +55,8 @@ static int irq_installed = 0;
 static char **sound_buffers = NULL;
 static char **sound_read_buffers = NULL;
 
+static spinlock_t cs4218_lock = SPIN_LOCK_UNLOCKED;
+
 /* Local copies of things we put in the control register.  Output
  * volume, like most codecs is really attenuation.
  */
@@ -1206,7 +1208,8 @@ static void CS_Play(void)
        volatile cbd_t  *bdp;
        volatile cpm8xx_t *cp;
 
-       save_flags(flags); cli();
+       /* Protect buffer */
+       spin_lock_irqsave(&cs4218_lock, flags);
 #if 0
        if (awacs_beep_state) {
                /* sound takes precedence over beeps */
@@ -1263,7 +1266,7 @@ static void CS_Play(void)
 
                ++sq.active;
        }
-       restore_flags(flags);
+       spin_unlock_irqrestore(&cs4218_lock, flags);
 }
 
 
@@ -1275,7 +1278,8 @@ static void CS_Record(void)
        if (read_sq.active)
                return;
 
-       save_flags(flags); cli();
+       /* Protect buffer */
+       spin_lock_irqsave(&cs4218_lock, flags);
 
        /* This is all we have to do......Just start it up.
        */
@@ -1284,7 +1288,7 @@ static void CS_Record(void)
 
        read_sq.active = 1;
 
-        restore_flags(flags);
+        spin_unlock_irqrestore(&cs4218_lock, flags);
 }
 
 
@@ -1365,14 +1369,15 @@ static void cs_nosound(unsigned long xx)
 {
        unsigned long flags;
 
-       save_flags(flags); cli();
+       /* not sure if this is needed, since hardware command is #if 0'd */
+       spin_lock_irqsave(&cs4218_lock, flags);
        if (beep_playing) {
 #if 0
                st_le16(&beep_dbdma_cmd->command, DBDMA_STOP);
 #endif
                beep_playing = 0;
        }
-       restore_flags(flags);
+       spin_unlock_irqrestore(&cs4218_lock, flags);
 }
 
 static struct timer_list beep_timer = TIMER_INITIALIZER(cs_nosound, 0, 0);
@@ -1401,21 +1406,22 @@ static void cs_mksound(unsigned int hz, unsigned int ticks)
                return;
 #endif
        }
-       save_flags(flags); cli();
+       /* lock while modifying beep_timer */
+       spin_lock_irqsave(&cs4218_lock, flags);
        del_timer(&beep_timer);
        if (ticks) {
                beep_timer.expires = jiffies + ticks;
                add_timer(&beep_timer);
        }
        if (beep_playing || sq.active || beep_buf == NULL) {
-               restore_flags(flags);
+               spin_unlock_irqrestore(&cs4218_lock, flags);
                return;         /* too hard, sorry :-( */
        }
        beep_playing = 1;
 #if 0
        st_le16(&beep_dbdma_cmd->command, OUTPUT_MORE + BR_ALWAYS);
 #endif
-       restore_flags(flags);
+       spin_unlock_irqrestore(&cs4218_lock, flags);
 
        if (hz == beep_hz_cache && beep_volume == beep_volume_cache) {
                nsamples = beep_nsamples_cache;
@@ -1442,7 +1448,7 @@ static void cs_mksound(unsigned int hz, unsigned int ticks)
        st_le32(&beep_dbdma_cmd->phy_addr, virt_to_bus(beep_buf));
        awacs_beep_state = 1;
 
-       save_flags(flags); cli();
+       spin_lock_irqsave(&cs4218_lock, flags);
        if (beep_playing) {     /* i.e. haven't been terminated already */
                out_le32(&awacs_txdma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
                out_le32(&awacs->control,
@@ -1452,8 +1458,8 @@ static void cs_mksound(unsigned int hz, unsigned int ticks)
                out_le32(&awacs_txdma->cmdptr, virt_to_bus(beep_dbdma_cmd));
                out_le32(&awacs_txdma->control, RUN | (RUN << 16));
        }
+       spin_unlock_irqrestore(&cs4218_lock, flags);
 #endif
-       restore_flags(flags);
 }
 
 static MACHINE mach_cs4218 = {