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, 45 insertions, 7 deletions

diff --git a/kernel/xpp/card_bri.c b/kernel/xpp/card_bri.c
index fb6be03..1e3ec8b 100644
--- a/kernel/xpp/card_bri.c
+++ b/kernel/xpp/card_bri.c
@@ -560,6 +560,7 @@ static int tx_dchan(xpd_t *xpd)
 		priv->txframe_begin = 1;
 	else
 		priv->txframe_begin = 0;
+	XPD_DBG(COMMANDS, xpd, "eoframe=%d len=%d\n", eoframe, len);
 	ret = send_multibyte_request(xpd->xbus, xpd->addr.unit, xpd->addr.subunit,
 			eoframe, priv->dchan_tbuf, len);
 	if(ret < 0)
@@ -615,13 +616,11 @@ static xpd_t *BRI_card_new(xbus_t *xbus, int unit, int subunit, const xproto_tab
 	int		channels = min(3, CHANNELS_PERXPD);
 
 	XBUS_DBG(GENERAL, xbus, "\n");
-	xpd = xpd_alloc(sizeof(struct BRI_priv_data), proto_table, channels);
+	xpd = xpd_alloc(xbus, unit, subunit, subtype, subunits, sizeof(struct BRI_priv_data), proto_table, channels);
 	if(!xpd)
 		return NULL;
 	xpd->direction = (to_phone) ? TO_PHONE : TO_PSTN;
 	xpd->type_name = (to_phone) ? "BRI_NT" : "BRI_TE";
-	if(xpd_common_init(xbus, xpd, unit, subunit, subtype, subunits) < 0)
-		goto err;
 	if(bri_proc_create(xbus, xpd) < 0)
 		goto err;
 	return xpd;
@@ -898,7 +897,7 @@ static int BRI_card_tick(xbus_t *xbus, xpd_t *xpd)
 static int BRI_card_ioctl(xpd_t *xpd, int pos, unsigned int cmd, unsigned long arg)
 {
 	BUG_ON(!xpd);
-	if(!TRANSPORT_RUNNING(xpd->xbus))
+	if(!XBUS_IS(xpd->xbus, READY))
 		return -ENODEV;
 	switch (cmd) {
 		case ZT_TONEDETECT:
@@ -1018,7 +1017,7 @@ static int bri_startup(struct zt_span *span)
 	BUG_ON(!xpd);
 	priv = xpd->priv;
 	BUG_ON(!priv);
-	if(!TRANSPORT_RUNNING(xpd->xbus)) {
+	if(!XBUS_IS(xpd->xbus, READY)) {
 		XPD_DBG(GENERAL, xpd, "Startup called by zaptel. No Hardware. Ignored\n");
 		return -ENODEV;
 	}
@@ -1051,7 +1050,7 @@ static int bri_shutdown(struct zt_span *span)
 	BUG_ON(!xpd);
 	priv = xpd->priv;
 	BUG_ON(!priv);
-	if(!TRANSPORT_RUNNING(xpd->xbus)) {
+	if(!XBUS_IS(xpd->xbus, READY)) {
 		XPD_DBG(GENERAL, xpd, "Shutdown called by zaptel. No Hardware. Ignored\n");
 		return -ENODEV;
 	}
@@ -1540,10 +1539,48 @@ static int proc_bri_info_read(char *page, char **start, off_t off, int count, in
 	return len;
 }
 
+static int bri_xpd_probe(struct device *dev)
+{
+	xpd_t	*xpd;
+
+	xpd = dev_to_xpd(dev);
+	/* Is it our device? */
+	if(xpd->type != XPD_TYPE_BRI) {
+		XPD_ERR(xpd, "drop suggestion for %s (%d)\n",
+			dev->bus_id, xpd->type);
+		return -EINVAL;
+	}
+	XPD_DBG(DEVICES, xpd, "SYSFS\n");
+	return 0;
+}
+
+static int bri_xpd_remove(struct device *dev)
+{
+	xpd_t	*xpd;
+
+	xpd = dev_to_xpd(dev);
+	XPD_DBG(DEVICES, xpd, "SYSFS\n");
+	return 0;
+}
+
+static struct xpd_driver	bri_driver = {
+	.type		= XPD_TYPE_BRI,
+	.driver		= {
+		.name = "bri",
+#ifndef OLD_HOTPLUG_SUPPORT
+		.owner = THIS_MODULE,
+#endif
+		.probe = bri_xpd_probe,
+		.remove = bri_xpd_remove
+	}
+};
+
 static int __init card_bri_startup(void)
 {
-	DBG(GENERAL, "\n");
+	int	ret;
 
+	if((ret = xpd_driver_register(&bri_driver.driver)) < 0)
+		return ret;
 	INFO("revision %s\n", XPP_VERSION);
 	xproto_register(&PROTO_TABLE(BRI));
 	return 0;
@@ -1553,6 +1590,7 @@ static void __exit card_bri_cleanup(void)
 {
 	DBG(GENERAL, "\n");
 	xproto_unregister(&PROTO_TABLE(BRI));
+	xpd_driver_unregister(&bri_driver.driver);
 }
 
 MODULE_DESCRIPTION("XPP BRI Card Driver");