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, 44 insertions, 4 deletions

diff --git a/kernel/xpp/card_fxs.c b/kernel/xpp/card_fxs.c
index 7068bf7..47688ef 100644
--- a/kernel/xpp/card_fxs.c
+++ b/kernel/xpp/card_fxs.c
@@ -397,7 +397,7 @@ static xpd_t *FXS_card_new(xbus_t *xbus, int unit, int subunit, const xproto_tab
 	channels = regular_channels;
 	if(unit == 0)
 		channels += 6;	/* 2 DIGITAL OUTPUTS, 4 DIGITAL INPUTS */
-	xpd = xpd_alloc(sizeof(struct FXS_priv_data), proto_table, channels);
+	xpd = xpd_alloc(xbus, unit, subunit, subtype, subunits, sizeof(struct FXS_priv_data), proto_table, channels);
 	if(!xpd)
 		return NULL;
 	if(unit == 0) {
@@ -407,8 +407,6 @@ static xpd_t *FXS_card_new(xbus_t *xbus, int unit, int subunit, const xproto_tab
 	}
 	xpd->direction = TO_PHONE;
 	xpd->type_name = "FXS";
-	if(xpd_common_init(xbus, xpd, unit, subunit, subtype, subunits) < 0)
-		goto err;
 	if(fxs_proc_create(xbus, xpd) < 0)
 		goto err;
 	priv = xpd->priv;
@@ -778,7 +776,7 @@ static int FXS_card_ioctl(xpd_t *xpd, int pos, unsigned int cmd, unsigned long a
 	BUG_ON(!priv);
 	xbus = xpd->xbus;
 	BUG_ON(!xbus);
-	if(!TRANSPORT_RUNNING(xbus))
+	if(!XBUS_IS(xbus, READY))
 		return -ENODEV;
 	if (pos < 0 || pos >= xpd->channels) {
 		XPD_NOTICE(xpd, "Bad channel number %d in %s(), cmd=%u\n",
@@ -1486,8 +1484,49 @@ static int proc_xpd_metering_write(struct file *file, const char __user *buffer,
 }
 #endif
 
+static int fxs_xpd_probe(struct device *dev)
+{
+	xpd_t	*xpd;
+
+	xpd = dev_to_xpd(dev);
+	/* Is it our device? */
+	if(xpd->type != XPD_TYPE_FXS) {
+		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 fxs_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	fxs_driver = {
+	.type		= XPD_TYPE_FXS,
+	.driver		= {
+		.name = "fxs",
+#ifndef OLD_HOTPLUG_SUPPORT
+		.owner = THIS_MODULE,
+#endif
+		.probe = fxs_xpd_probe,
+		.remove = fxs_xpd_remove
+	}
+};
+
 static int __init card_fxs_startup(void)
 {
+	int	ret;
+
+	if((ret = xpd_driver_register(&fxs_driver.driver)) < 0)
+		return ret;
+
 	INFO("revision %s\n", XPP_VERSION);
 #ifdef	POLL_DIGITAL_INPUTS
 	INFO("FEATURE: with DIGITAL INPUTS support (polled every %d msec)\n",
@@ -1512,6 +1551,7 @@ static int __init card_fxs_startup(void)
 static void __exit card_fxs_cleanup(void)
 {
 	xproto_unregister(&PROTO_TABLE(FXS));
+	xpd_driver_unregister(&fxs_driver.driver);
 }
 
 MODULE_DESCRIPTION("XPP FXS Card Driver");