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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/isdn/sc/timer.c
Initial import
Diffstat (limited to 'drivers/isdn/sc/timer.c')
-rw-r--r--drivers/isdn/sc/timer.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/isdn/sc/timer.c b/drivers/isdn/sc/timer.c
new file mode 100644
index 000000000..6fbac2230
--- /dev/null
+++ b/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);
+}