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, 29 insertions, 0 deletions

diff --git a/kernel/xpp/xpd.h b/kernel/xpp/xpd.h
index 7f85890..717e68d 100644
--- a/kernel/xpp/xpd.h
+++ b/kernel/xpp/xpd.h
@@ -29,6 +29,7 @@
 #ifdef	__KERNEL__
 #include <linux/kernel.h>
 #include <linux/device.h>
+#include <linux/version.h>
 #include <asm/atomic.h>
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
 #include <linux/semaphore.h>
@@ -138,6 +139,16 @@ static struct xpd_counters {
 
 #define	XPD_COUNTER_MAX	(sizeof(xpd_counters)/sizeof(xpd_counters[0]))
 
+enum xpd_state {
+	XPD_STATE_START,
+	XPD_STATE_INIT_REGS,
+	XPD_STATE_READY,
+	XPD_STATE_NOHW,
+};
+
+bool		xpd_setstate(xpd_t *xpd, enum xpd_state newstate);
+const char	*xpd_statename(enum xpd_state st);
+
 /*
  * An XPD is a single Xorcom Protocol Device
  */
@@ -162,6 +173,10 @@ struct xpd {
 	xpp_line_t	digital_signalling;	/* BRI signalling channels */
 	uint		timing_priority;	/* from 'span' directives in zapata.conf */
 
+	enum xpd_state	xpd_state;
+	struct device	xpd_dev;
+#define	dev_to_xpd(dev)	container_of(dev, struct xpd, xpd_dev)
+
 	/* Assure atomicity of changes to pcm_len and wanted_pcm_mask */
 	spinlock_t	lock_recompute_pcm;
 	/* maintained by card drivers */
@@ -185,10 +200,12 @@ struct xpd {
 #ifdef CONFIG_PROC_FS
 	struct proc_dir_entry	*proc_xpd_dir;
 	struct proc_dir_entry	*proc_xpd_summary;
+#ifdef	OLD_PROC
 	struct proc_dir_entry	*proc_xpd_ztregister;
 	struct proc_dir_entry	*proc_xpd_blink;
 	struct proc_dir_entry	*proc_xpd_chipregs;
 #endif
+#endif
 
 	int		counters[XPD_COUNTER_MAX];
 
@@ -229,6 +246,18 @@ static inline void *my_kzalloc(size_t size, gfp_t flags)
 	return p;
 }
 
+struct xpd_driver {
+	xpd_type_t	type;
+
+	struct device_driver	driver;
+#define   driver_to_xpd_driver(driver) container_of(driver, struct xpd_driver, driver)
+};
+
+int	xpd_driver_register(struct device_driver *driver);
+void	xpd_driver_unregister(struct device_driver *driver);
+xpd_t	*get_xpd(const char *msg, xpd_t *xpd);
+void	put_xpd(const char *msg, xpd_t *xpd);
+
 #endif
 
 #endif	/* XPD_H */