patch-2.3.14 linux/drivers/isdn/hisax/mic.c

• Lines: 106
• Date: Thu Aug 12 09:42:33 1999
• Orig file: v2.3.13/linux/drivers/isdn/hisax/mic.c
• Orig date: Thu Jul 8 15:42:20 1999

diff -u --recursive --new-file v2.3.13/linux/drivers/isdn/hisax/mic.c linux/drivers/isdn/hisax/mic.c
@@ -1,4 +1,4 @@
-/* $Id: mic.c,v 1.7 1998/04/15 16:44:32 keil Exp $
+/* $Id: mic.c,v 1.8 1999/07/12 21:05:20 keil Exp $
 
  * mic.c  low level stuff for mic cards
  *
@@ -8,6 +8,10 @@
  *
  *
  * $Log: mic.c,v $
+ * Revision 1.8  1999/07/12 21:05:20  keil
+ * fix race in IRQ handling
+ * added watchdog for lost IRQs
+ *
  * Revision 1.7  1998/04/15 16:44:32  keil
  * new init code
  *
@@ -40,7 +44,7 @@
 
 extern const char *CardType[];
 
-const char *mic_revision = "$Revision: 1.7 $";
+const char *mic_revision = "$Revision: 1.8 $";
 
 #define byteout(addr,val) outb(val,addr)
 #define bytein(addr) inb(addr)
@@ -158,7 +162,7 @@
 mic_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 {
 	struct IsdnCardState *cs = dev_id;
-	u_char val, stat = 0;
+	u_char val;
 
 	if (!cs) {
 		printk(KERN_WARNING "mic: Spurious interrupt!\n");
@@ -166,16 +170,12 @@
 	}
 	val = readreg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_ISTA + 0x40);
       Start_HSCX:
-	if (val) {
+	if (val)
 		hscx_int_main(cs, val);
-		stat |= 1;
-	}
 	val = readreg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_ISTA);
       Start_ISAC:
-	if (val) {
+	if (val)
 		isac_interrupt(cs, val);
-		stat |= 2;
-	}
 	val = readreg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_ISTA + 0x40);
 	if (val) {
 		if (cs->debug & L1_DEB_HSCX)
@@ -188,16 +188,12 @@
 			debugl1(cs, "ISAC IntStat after IntRoutine");
 		goto Start_ISAC;
 	}
-	if (stat & 1) {
-		writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0xFF);
-		writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0xFF);
-		writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0x0);
-		writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0x0);
-	}
-	if (stat & 2) {
-		writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0xFF);
-		writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0x0);
-	}
+	writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0xFF);
+	writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0xFF);
+	writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0xFF);
+	writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0x0);
+	writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0x0);
+	writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0x0);
 }
 
 void
@@ -218,9 +214,6 @@
 		case CARD_RELEASE:
 			release_io_mic(cs);
 			return(0);
-		case CARD_SETIRQ:
-			return(request_irq(cs->irq, &mic_interrupt,
-					I4L_IRQ_FLAG, "HiSax", cs));
 		case CARD_INIT:
 			inithscx(cs); /* /RTSA := ISAC RST */
 			inithscxisac(cs, 3);
@@ -231,8 +224,8 @@
 	return(0);
 }
 
-int __init 
-setup_mic(struct IsdnCard *card)
+__initfunc(int
+setup_mic(struct IsdnCard *card))
 {
 	int bytecnt;
 	struct IsdnCardState *cs = card->cs;
@@ -273,6 +266,7 @@
 	cs->BC_Write_Reg = &WriteHSCX;
 	cs->BC_Send_Data = &hscx_fill_fifo;
 	cs->cardmsg = &mic_card_msg;
+	cs->irq_func = &mic_interrupt;
 	ISACVersion(cs, "mic:");
 	if (HscxVersion(cs, "mic:")) {
 		printk(KERN_WARNING