xpp: a massive backport from DAHDI. From Xorcom branch-rel-6839-r6908 .

Sun Mar  1 2009 Oron Peled <oron@actcom.co.il> - xpp.r6795
  * Fix cases where the command_queue overflowed during initialization.
    - Also add a 'command_queue_length' parameter to xpp.ko
  * More migrations to sysfs:
    - Add a 'transport' attribute to our astribank devices which
      points to the usb device we use. E.g:
       /sys/bus/astribanks/devices/xbus-00/transport is symlinked to
       ../../../../../../devices/pci0000:00/0000:00:10.4/usb5/5-4
    - Move /proc/xpp/XBUS-??/XPD-??/span to
      /sys/bus/xpds/devices/??:?:?/span
    - Migrate from /proc/xpp/sync to:
      /sys/bus/astribanks/drivers/xppdrv/sync
    - New 'offhook' attribute in:
      /sys/bus/xpds/devices/??:?:?/offhook
  * PRI: change the "timing" priority to match the convention used by
         other PRI cards -- I.e: lower numbers (not 0) have higher
	 priority.
  * FXO: 
    - Power denial: create two module parameters instead of hard-coded
      constants (power_denial_safezone, power_denial_minlen).
      For sites that get non-standard power-denial signals from central
      office on offhook.
    - Don't hangup on power-denial, just notify Dahdi and wait for
    - Fix caller-id detection for the case central office sends it before
      first ring without any indication before.
      Asterisk's desicion.
Mon, Dec  8 2008 Oron Peled <oron@actcom.co.il> - xpp.r6430
  * PRI:
    - Match our span clocking priorities (in system.conf)
      to Digium -- this is a reversal of the previous state.
      Now lower numbers (greater than 0) are better.
    - Synchronization fixes for PRI ports other than 0.
    - Fix T1 CRC for some countries (e.g: China).
  * FXS: fix bug in VMWI detection if using old asterisk
    which does not provide ZT_VMWI ioctl().
  * FXO:
    - Improve caller_id_style module parameter. This provide a workaround
      for countries that send this information without any notification
      (reverse polarity, ring, etc.)
    - Don't force on-hook upon power-denial. So, loopstart devices
      would ignore these as expected.
  * Implement a flow-control to prevent user space (init_card_* scripts)
    from pressuring our command queue.


git-svn-id: http://svn.digium.com/svn/zaptel/branches/1.4@4631 5390a7c7-147a-4af0-8ec9-7488f05a26cb

1 files changed, 4 insertions, 7 deletions

diff --git a/kernel/xpp/xbus-pcm.h b/kernel/xpp/xbus-pcm.h
index b4c0cf6..dbfecde 100644
--- a/kernel/xpp/xbus-pcm.h
+++ b/kernel/xpp/xbus-pcm.h
@@ -80,6 +80,8 @@ struct xpp_drift {
 	int			median;			/* (max + min) / 2	*/
 	int			jitter;			/* max - min		*/
 	int			calc_drift;
+	int			kicks_up;
+	int			kicks_down;
 	spinlock_t		lock;
 };
 
@@ -112,17 +114,12 @@ void		got_new_syncer(xbus_t *xbus, enum sync_mode mode, int drift);
 int		xbus_command_queue_tick(xbus_t *xbus);
 void		xbus_reset_counters(xbus_t *xbus);
 void		elect_syncer(const char *msg);
-int		xpp_echocan(struct zt_chan *chan, int len);
+int		exec_sync_command(const char *buf, size_t count);
+int		fill_sync_string(char *buf, size_t count);
 #ifdef	ZAPTEL_SYNC_TICK
 int		zaptel_sync_tick(struct zt_span *span, int is_master);
 #endif
 
-#ifdef	XPP_EC_CHUNK
-extern int xpp_ec;
-#else
-#define	xpp_ec	0
-#endif
-
 #ifdef	DEBUG_PCMTX
 extern int	pcmtx;
 extern int	pcmtx_chan;