patch-2.2.11 linux/drivers/isdn/hisax/saphir.c

• Lines: 327
• Date: Mon Aug 9 12:04:39 1999
• Orig file: v2.2.10/linux/drivers/isdn/hisax/saphir.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.10/linux/drivers/isdn/hisax/saphir.c linux/drivers/isdn/hisax/saphir.c
@@ -0,0 +1,326 @@
+/* $Id: saphir.c,v 1.3 1999/07/12 21:05:26 keil Exp $
+
+ * saphir.c low level stuff for HST Saphir 1
+ *
+ * Author     Karsten Keil (keil@isdn4linux.de)
+ *
+ * Thanks to    HST High Soft Tech GmbH
+ *
+ *
+ * $Log: saphir.c,v $
+ * Revision 1.3  1999/07/12 21:05:26  keil
+ * fix race in IRQ handling
+ * added watchdog for lost IRQs
+ *
+ * Revision 1.2  1999/07/01 08:07:55  keil
+ * Initial version
+ *
+ *
+ */
+
+
+#define __NO_VERSION__
+#include "hisax.h"
+#include "isac.h"
+#include "hscx.h"
+#include "isdnl1.h"
+
+extern const char *CardType[];
+static char *saphir_rev = "$Revision: 1.3 $";
+
+#define byteout(addr,val) outb(val,addr)
+#define bytein(addr) inb(addr)
+
+#define ISAC_DATA	0
+#define HSCX_DATA	1
+#define ADDRESS_REG	2
+#define IRQ_REG		3
+#define SPARE_REG	4
+#define RESET_REG	5
+
+static inline u_char
+readreg(unsigned int ale, unsigned int adr, u_char off)
+{
+	register u_char ret;
+	long flags;
+
+	save_flags(flags);
+	cli();
+	byteout(ale, off);
+	ret = bytein(adr);
+	restore_flags(flags);
+	return (ret);
+}
+
+static inline void
+readfifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
+{
+	/* fifo read without cli because it's allready done  */
+
+	byteout(ale, off);
+	insb(adr, data, size);
+}
+
+
+static inline void
+writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
+{
+	long flags;
+
+	save_flags(flags);
+	cli();
+	byteout(ale, off);
+	byteout(adr, data);
+	restore_flags(flags);
+}
+
+static inline void
+writefifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
+{
+	/* fifo write without cli because it's allready done  */
+	byteout(ale, off);
+	outsb(adr, data, size);
+}
+
+/* Interface functions */
+
+static u_char
+ReadISAC(struct IsdnCardState *cs, u_char offset)
+{
+	return (readreg(cs->hw.saphir.ale, cs->hw.saphir.isac, offset));
+}
+
+static void
+WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
+{
+	writereg(cs->hw.saphir.ale, cs->hw.saphir.isac, offset, value);
+}
+
+static void
+ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
+{
+	readfifo(cs->hw.saphir.ale, cs->hw.saphir.isac, 0, data, size);
+}
+
+static void
+WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
+{
+	writefifo(cs->hw.saphir.ale, cs->hw.saphir.isac, 0, data, size);
+}
+
+static u_char
+ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
+{
+	return (readreg(cs->hw.saphir.ale, cs->hw.saphir.hscx,
+		offset + (hscx ? 0x40 : 0)));
+}
+
+static void
+WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
+{
+	writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx,
+		offset + (hscx ? 0x40 : 0), value);
+}
+
+#define READHSCX(cs, nr, reg) readreg(cs->hw.saphir.ale, \
+		cs->hw.saphir.hscx, reg + (nr ? 0x40 : 0))
+#define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.saphir.ale, \
+		cs->hw.saphir.hscx, reg + (nr ? 0x40 : 0), data)
+
+#define READHSCXFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.saphir.ale, \
+		cs->hw.saphir.hscx, (nr ? 0x40 : 0), ptr, cnt)
+
+#define WRITEHSCXFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.saphir.ale, \
+		cs->hw.saphir.hscx, (nr ? 0x40 : 0), ptr, cnt)
+
+#include "hscx_irq.c"
+
+static void
+saphir_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+{
+	struct IsdnCardState *cs = dev_id;
+	u_char val;
+
+	if (!cs) {
+		printk(KERN_WARNING "saphir: Spurious interrupt!\n");
+		return;
+	}
+	val = readreg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_ISTA + 0x40);
+      Start_HSCX:
+	if (val)
+		hscx_int_main(cs, val);
+	val = readreg(cs->hw.saphir.ale, cs->hw.saphir.isac, ISAC_ISTA);
+      Start_ISAC:
+	if (val)
+		isac_interrupt(cs, val);
+	val = readreg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_ISTA + 0x40);
+	if (val) {
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "HSCX IntStat after IntRoutine");
+		goto Start_HSCX;
+	}
+	val = readreg(cs->hw.saphir.ale, cs->hw.saphir.isac, ISAC_ISTA);
+	if (val) {
+		if (cs->debug & L1_DEB_ISAC)
+			debugl1(cs, "ISAC IntStat after IntRoutine");
+		goto Start_ISAC;
+	}
+	/* Watchdog */
+	if (cs->hw.saphir.timer.function) {
+		del_timer(&cs->hw.saphir.timer);
+		cs->hw.saphir.timer.expires = jiffies + 1*HZ;
+		add_timer(&cs->hw.saphir.timer);
+	} else
+		printk(KERN_WARNING "saphir: Spurious timer!\n");
+	writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK, 0xFF);
+	writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK + 0x40, 0xFF);
+	writereg(cs->hw.saphir.ale, cs->hw.saphir.isac, ISAC_MASK, 0xFF);
+	writereg(cs->hw.saphir.ale, cs->hw.saphir.isac, ISAC_MASK, 0);
+	writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK, 0);
+	writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK + 0x40, 0);
+}
+
+static void
+SaphirWatchDog(struct IsdnCardState *cs)
+{
+        /* 5 sec WatchDog, so read at least every 4 sec */
+	cs->readisac(cs, ISAC_RBCH);
+	del_timer(&cs->hw.saphir.timer);
+	cs->hw.saphir.timer.expires = jiffies + 1*HZ;
+	add_timer(&cs->hw.saphir.timer);
+}
+
+void
+release_io_saphir(struct IsdnCardState *cs)
+{
+	long flags;
+	
+	save_flags(flags);
+	cli();
+	byteout(cs->hw.saphir.cfg_reg + IRQ_REG, 0xff);
+	del_timer(&cs->hw.saphir.timer);
+	cs->hw.saphir.timer.function = NULL;
+	restore_flags(flags);
+	if (cs->hw.saphir.cfg_reg)
+		release_region(cs->hw.saphir.cfg_reg, 6);
+}
+
+static int
+saphir_reset(struct IsdnCardState *cs)
+{
+	long flags;
+	u_char irq_val;
+
+	switch(cs->irq) {
+		case 5: irq_val = 0;
+			break;
+		case 3: irq_val = 1;
+			break;
+		case 11:
+			irq_val = 2;
+			break;
+		case 12:
+			irq_val = 3;
+			break;
+		case 15:
+			irq_val = 4;
+			break;
+		default:
+			printk(KERN_WARNING "HiSax: saphir wrong IRQ %d\n",
+				cs->irq);
+			return (1);
+	}
+	byteout(cs->hw.saphir.cfg_reg + IRQ_REG, irq_val);
+	save_flags(flags);
+	sti();
+	byteout(cs->hw.saphir.cfg_reg + RESET_REG, 1);
+	current->state = TASK_INTERRUPTIBLE;
+	schedule_timeout((30*HZ)/1000);	/* Timeout 30ms */
+	byteout(cs->hw.saphir.cfg_reg + RESET_REG, 0);
+	current->state = TASK_INTERRUPTIBLE;
+	schedule_timeout((30*HZ)/1000);	/* Timeout 30ms */
+	restore_flags(flags);
+	byteout(cs->hw.saphir.cfg_reg + IRQ_REG, irq_val);
+	byteout(cs->hw.saphir.cfg_reg + SPARE_REG, 0x02);
+	return (0);
+}
+
+static int
+saphir_card_msg(struct IsdnCardState *cs, int mt, void *arg)
+{
+	switch (mt) {
+		case CARD_RESET:
+			saphir_reset(cs);
+			return(0);
+		case CARD_RELEASE:
+			release_io_saphir(cs);
+			return(0);
+		case CARD_INIT:
+			inithscxisac(cs, 3);
+			return(0);
+		case CARD_TEST:
+			return(0);
+	}
+	return(0);
+}
+
+
+__initfunc(int
+setup_saphir(struct IsdnCard *card))
+{
+	struct IsdnCardState *cs = card->cs;
+	char tmp[64];
+
+	strcpy(tmp, saphir_rev);
+	printk(KERN_INFO "HiSax: HST Saphir driver Rev. %s\n", HiSax_getrev(tmp));
+	if (cs->typ != ISDN_CTYPE_HSTSAPHIR)
+		return (0);
+
+	/* IO-Ports */
+	cs->hw.saphir.cfg_reg = card->para[1];
+	cs->hw.saphir.isac = card->para[1] + ISAC_DATA;
+	cs->hw.saphir.hscx = card->para[1] + HSCX_DATA;
+	cs->hw.saphir.ale = card->para[1] + ADDRESS_REG;
+	cs->irq = card->para[0];
+	if (check_region((cs->hw.saphir.cfg_reg), 6)) {
+		printk(KERN_WARNING
+			"HiSax: %s config port %x-%x already in use\n",
+			CardType[card->typ],
+			cs->hw.saphir.cfg_reg,
+			cs->hw.saphir.cfg_reg + 5);
+		return (0);
+	} else
+		request_region(cs->hw.saphir.cfg_reg,6, "saphir");
+
+	printk(KERN_INFO
+	       "HiSax: %s config irq:%d io:0x%X\n",
+	       CardType[cs->typ], cs->irq,
+	       cs->hw.saphir.cfg_reg);
+
+	cs->hw.saphir.timer.function = (void *) SaphirWatchDog;
+	cs->hw.saphir.timer.data = (long) cs;
+	init_timer(&cs->hw.saphir.timer);
+	cs->hw.saphir.timer.expires = jiffies + 4*HZ;
+	add_timer(&cs->hw.saphir.timer);
+	if (saphir_reset(cs)) {
+		release_io_saphir(cs);
+		return (0);
+	}
+	cs->readisac = &ReadISAC;
+	cs->writeisac = &WriteISAC;
+	cs->readisacfifo = &ReadISACfifo;
+	cs->writeisacfifo = &WriteISACfifo;
+	cs->BC_Read_Reg = &ReadHSCX;
+	cs->BC_Write_Reg = &WriteHSCX;
+	cs->BC_Send_Data = &hscx_fill_fifo;
+	cs->cardmsg = &saphir_card_msg;
+	cs->irq_func = &saphir_interrupt;
+	ISACVersion(cs, "saphir:");
+	if (HscxVersion(cs, "saphir:")) {
+		printk(KERN_WARNING
+		    "saphir: wrong HSCX versions check IO address\n");
+		release_io_saphir(cs);
+		return (0);
+	}
+	return (1);
+}