Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / isdn / sc / timer.c

diff --git a/kernel/drivers/isdn/sc/timer.c b/kernel/drivers/isdn/sc/timer.c
new file mode 100644 (file)
index 0000000..6fbac22
--- /dev/null
+++ b/kernel/drivers/isdn/sc/timer.c
@@ -0,0 +1,122 @@
+/* $Id: timer.c,v 1.3.6.1 2001/09/23 22:24:59 kai Exp $
+ *
+ * Copyright (C) 1996  SpellCaster Telecommunications Inc.
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * For more information, please contact gpl-info@spellcast.com or write:
+ *
+ *     SpellCaster Telecommunications Inc.
+ *     5621 Finch Avenue East, Unit #3
+ *     Scarborough, Ontario  Canada
+ *     M1B 2T9
+ *     +1 (416) 297-8565
+ *     +1 (416) 297-6433 Facsimile
+ */
+
+#include "includes.h"
+#include "hardware.h"
+#include "message.h"
+#include "card.h"
+
+
+/*
+ * Write the proper values into the I/O ports following a reset
+ */
+static void setup_ports(int card)
+{
+
+       outb((sc_adapter[card]->rambase >> 12), sc_adapter[card]->ioport[EXP_BASE]);
+
+       /* And the IRQ */
+       outb((sc_adapter[card]->interrupt | 0x80),
+            sc_adapter[card]->ioport[IRQ_SELECT]);
+}
+
+/*
+ * Timed function to check the status of a previous reset
+ * Must be very fast as this function runs in the context of
+ * an interrupt handler.
+ *
+ * Setup the ioports for the board that were cleared by the reset.
+ * Then, check to see if the signate has been set. Next, set the
+ * signature to a known value and issue a startproc if needed.
+ */
+void sc_check_reset(unsigned long data)
+{
+       unsigned long flags;
+       unsigned long sig;
+       int card = (unsigned int) data;
+
+       pr_debug("%s: check_timer timer called\n",
+                sc_adapter[card]->devicename);
+
+       /* Setup the io ports */
+       setup_ports(card);
+
+       spin_lock_irqsave(&sc_adapter[card]->lock, flags);
+       outb(sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport],
+            (sc_adapter[card]->shmem_magic >> 14) | 0x80);
+       sig = (unsigned long) *((unsigned long *)(sc_adapter[card]->rambase + SIG_OFFSET));
+
+       /* check the signature */
+       if (sig == SIGNATURE) {
+               flushreadfifo(card);
+               spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
+               /* See if we need to do a startproc */
+               if (sc_adapter[card]->StartOnReset)
+                       startproc(card);
+       } else  {
+               pr_debug("%s: No signature yet, waiting another %lu jiffies.\n",
+                        sc_adapter[card]->devicename, CHECKRESET_TIME);
+               mod_timer(&sc_adapter[card]->reset_timer, jiffies + CHECKRESET_TIME);
+               spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
+       }
+}
+
+/*
+ * Timed function to check the status of a previous reset
+ * Must be very fast as this function runs in the context of
+ * an interrupt handler.
+ *
+ * Send check sc_adapter->phystat to see if the channels are up
+ * If they are, tell ISDN4Linux that the board is up. If not,
+ * tell IADN4Linux that it is up. Always reset the timer to
+ * fire again (endless loop).
+ */
+void check_phystat(unsigned long data)
+{
+       unsigned long flags;
+       int card = (unsigned int) data;
+
+       pr_debug("%s: Checking status...\n", sc_adapter[card]->devicename);
+       /*
+        * check the results of the last PhyStat and change only if
+        * has changed drastically
+        */
+       if (sc_adapter[card]->nphystat && !sc_adapter[card]->phystat) {   /* All is well */
+               pr_debug("PhyStat transition to RUN\n");
+               pr_info("%s: Switch contacted, transmitter enabled\n",
+                       sc_adapter[card]->devicename);
+               indicate_status(card, ISDN_STAT_RUN, 0, NULL);
+       }
+       else if (!sc_adapter[card]->nphystat && sc_adapter[card]->phystat) {   /* All is not well */
+               pr_debug("PhyStat transition to STOP\n");
+               pr_info("%s: Switch connection lost, transmitter disabled\n",
+                       sc_adapter[card]->devicename);
+
+               indicate_status(card, ISDN_STAT_STOP, 0, NULL);
+       }
+
+       sc_adapter[card]->phystat = sc_adapter[card]->nphystat;
+
+       /* Reinitialize the timer */
+       spin_lock_irqsave(&sc_adapter[card]->lock, flags);
+       mod_timer(&sc_adapter[card]->stat_timer, jiffies + CHECKSTAT_TIME);
+       spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
+
+       /* Send a new cePhyStatus message */
+       sendmessage(card, CEPID, ceReqTypePhy, ceReqClass2,
+                   ceReqPhyStatus, 0, 0, NULL);
+}