File 0003-icE1usb-Support-reporting-of-RED-alarm-via... of Package dahdi-linux

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File 0003-icE1usb-Support-reporting-of-RED-alarm-via-DAHDI-inf.patch of Package dahdi-linux (Revision 5742bd6c399ed382da7a38ddacb93e9e)

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From f8ff6e4c975e389c35be1f891134a80ee9e93e57 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@osmocom.org>
Date: Fri, 31 Dec 2021 20:17:07 +0100
Subject: [PATCH 3/6] icE1usb: Support reporting of RED alarm via DAHDI
 infrastructure

We get loss-of-framing and loss-of-signal notification via USB interrupt
transfers.  Let's make use of this information to tell the DAHDI core
[and ultimately the user] about this.
---
 drivers/dahdi/icE1usb/icE1usb.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/dahdi/icE1usb/icE1usb.c b/drivers/dahdi/icE1usb/icE1usb.c
index 2871039..ecda385 100644
--- a/drivers/dahdi/icE1usb/icE1usb.c
+++ b/drivers/dahdi/icE1usb/icE1usb.c
@@ -438,6 +438,8 @@ static void iso_out_complete(struct urb *urb)
  * INTERRUPT transfers
  ***********************************************************************/
 
+#define ALL_RED_ALARMS (DAHDI_ALARM_RED | DAHDI_ALARM_LFA | DAHDI_ALARM_LMFA | ICE1USB_ERR_F_LOS)
+
 /* interrupt EP completes: Process and resubmit */
 static void ice1usb_irq_complete(struct urb *urb)
 {
@@ -449,6 +451,7 @@ static void ice1usb_irq_complete(struct urb *urb)
 
 	if (urb->status == 0 && urb->actual_length >= sizeof(*irq)) {
 		const struct ice1usb_irq_err *err;
+		unsigned int alarms = 0;
 		irq = (struct ice1usb_irq *) urb->transfer_buffer;
 		switch (irq->type) {
 		case ICE1USB_IRQ_T_ERRCNT:
@@ -456,6 +459,15 @@ static void ice1usb_irq_complete(struct urb *urb)
 			ieu_dbg(ieu, "IRQ: crc=%u, align=%u, ovfl=%u, unfl=%u, flags=%x",
 				le16_to_cpu(err->crc), le16_to_cpu(err->align),
 				le16_to_cpu(err->ovfl), le16_to_cpu(err->unfl), err->flags);
+			/* update alarms.  Other drivers have some de-bouncing timers, I guess
+			 * we can get away without doing this. */
+			if (err->flags & ICE1USB_ERR_F_LOS)
+				alarms |= DAHDI_ALARM_RED | DAHDI_ALARM_LOS;
+			if (err->flags & ICE1USB_ERR_F_ALIGN_ERR)
+				alarms |= DAHDI_ALARM_RED | DAHDI_ALARM_LFA | DAHDI_ALARM_LMFA;
+			ieu->dahdi.span.alarms &= ~ALL_RED_ALARMS;
+			ieu->dahdi.span.alarms |= alarms;
+			dahdi_alarm_notify(&ieu->dahdi.span);
 			break;
 		}
 	} else if (urb->status == -ENOENT) {
-- 
2.34.1

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File 0003-icE1usb-Support-reporting-of-RED-alarm-via-DAHDI-inf.patch of Package dahdi-linux (Revision 5742bd6c399ed382da7a38ddacb93e9e)

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