mISDN: Add different different timer settings for hfc-pci

     - Poll-timer can now be set from 8 to 256 samples, depending on your kernel.
     - If default or 128 is used, the normal controller's clock is used as before.
       Usage: modprobe hfcpci poll=XXX
     - Added some debug code for dsp buffer size. (CMX_DELAY_DEBUG)

    Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
    Signed-off-by: Karsten Keil <kkeil@suse.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/isdn/mISDN/dsp_cmx.c b/drivers/isdn/mISDN/dsp_cmx.c
index efe4c7430e6d..02f643456b16 100644
--- a/drivers/isdn/mISDN/dsp_cmx.c
+++ b/drivers/isdn/mISDN/dsp_cmx.c
@@ -137,6 +137,7 @@
 /* #define CMX_CONF_DEBUG */
 
 /*#define CMX_DEBUG * massive read/write pointer output */
+/*#define CMX_DELAY_DEBUG * gives rx-buffer delay overview */
 /*#define CMX_TX_DEBUG * massive read/write on tx-buffer with content */
 
 static inline int
@@ -1135,6 +1136,25 @@ dsp_cmx_conf(struct dsp *dsp, u32 conf_id)
         return 0;
 }
 
+#ifdef CMX_DELAY_DEBUG
+int delaycount;
+static void
+showdelay(struct dsp *dsp, int samples, int delay)
+{
+        char bar[] = "--------------------------------------------------|";
+        int sdelay;
+
+        delaycount += samples;
+        if (delaycount < 8000)
+                return;
+        delaycount = 0;
+
+        sdelay = delay * 50 / (dsp_poll << 2);
+
+        printk(KERN_DEBUG "DELAY (%s) %3d >%s\n", dsp->name, delay,
+                sdelay > 50 ? "..." : bar + 50 - sdelay);
+}
+#endif
 
 /*
  * audio data is received from card
@@ -1256,6 +1276,9 @@ dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb)
 
         /* increase write-pointer */
         dsp->rx_W = ((dsp->rx_W+len) & CMX_BUFF_MASK);
+#ifdef CMX_DELAY_DEBUG
+        showdelay(dsp, len, (dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK);
+#endif
 }