372 lines
8.3 KiB
C
372 lines
8.3 KiB
C
/* $Id$
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* teleint.c low level stuff for TeleInt isdn cards
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*
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* Author Karsten Keil (keil@isdn4linux.de)
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*
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*
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* $Log$
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* Revision 1.9 1999/07/12 21:05:30 keil
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* fix race in IRQ handling
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* added watchdog for lost IRQs
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*
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* Revision 1.8 1999/07/01 08:12:12 keil
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* Common HiSax version for 2.0, 2.1, 2.2 and 2.3 kernel
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*
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* Revision 1.7 1998/11/15 23:55:26 keil
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* changes from 2.0
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*
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* Revision 1.6 1998/04/15 16:45:31 keil
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* new init code
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*
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* Revision 1.5 1998/02/02 13:40:47 keil
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* fast io
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*
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* Revision 1.4 1997/11/08 21:35:53 keil
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* new l1 init
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*
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* Revision 1.3 1997/11/06 17:09:30 keil
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* New 2.1 init code
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*
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* Revision 1.2 1997/10/29 18:55:53 keil
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* changes for 2.1.60 (irq2dev_map)
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*
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* Revision 1.1 1997/09/11 17:32:32 keil
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* new
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*
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*
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*/
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#define __NO_VERSION__
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#include "hisax.h"
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#include "isac.h"
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#include "hfc_2bs0.h"
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#include "isdnl1.h"
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extern const char *CardType[];
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const char *TeleInt_revision = "$Revision$";
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#define byteout(addr,val) outb(val,addr)
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#define bytein(addr) inb(addr)
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static inline u_char
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readreg(unsigned int ale, unsigned int adr, u_char off)
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{
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register u_char ret;
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int max_delay = 2000;
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long flags;
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save_flags(flags);
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cli();
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byteout(ale, off);
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ret = HFC_BUSY & bytein(ale);
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while (ret && --max_delay)
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ret = HFC_BUSY & bytein(ale);
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if (!max_delay) {
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printk(KERN_WARNING "TeleInt Busy not inactive\n");
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restore_flags(flags);
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return (0);
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}
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ret = bytein(adr);
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restore_flags(flags);
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return (ret);
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}
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static inline void
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readfifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
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{
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register u_char ret;
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register int max_delay = 20000;
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register int i;
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byteout(ale, off);
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for (i = 0; i<size; i++) {
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ret = HFC_BUSY & bytein(ale);
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while (ret && --max_delay)
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ret = HFC_BUSY & bytein(ale);
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if (!max_delay) {
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printk(KERN_WARNING "TeleInt Busy not inactive\n");
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return;
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}
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data[i] = bytein(adr);
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}
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}
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static inline void
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writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
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{
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register u_char ret;
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int max_delay = 2000;
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long flags;
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save_flags(flags);
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cli();
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byteout(ale, off);
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ret = HFC_BUSY & bytein(ale);
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while (ret && --max_delay)
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ret = HFC_BUSY & bytein(ale);
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if (!max_delay) {
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printk(KERN_WARNING "TeleInt Busy not inactive\n");
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restore_flags(flags);
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return;
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}
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byteout(adr, data);
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restore_flags(flags);
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}
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static inline void
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writefifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
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{
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register u_char ret;
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register int max_delay = 20000;
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register int i;
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/* fifo write without cli because it's allready done */
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byteout(ale, off);
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for (i = 0; i<size; i++) {
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ret = HFC_BUSY & bytein(ale);
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while (ret && --max_delay)
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ret = HFC_BUSY & bytein(ale);
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if (!max_delay) {
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printk(KERN_WARNING "TeleInt Busy not inactive\n");
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return;
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}
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byteout(adr, data[i]);
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}
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}
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/* Interface functions */
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static u_char
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ReadISAC(struct IsdnCardState *cs, u_char offset)
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{
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cs->hw.hfc.cip = offset;
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return (readreg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, offset));
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}
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static void
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WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
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{
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cs->hw.hfc.cip = offset;
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writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, offset, value);
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}
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static void
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ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
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{
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cs->hw.hfc.cip = 0;
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readfifo(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, 0, data, size);
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}
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static void
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WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
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{
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cs->hw.hfc.cip = 0;
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writefifo(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, 0, data, size);
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}
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static u_char
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ReadHFC(struct IsdnCardState *cs, int data, u_char reg)
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{
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register u_char ret;
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if (data) {
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cs->hw.hfc.cip = reg;
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byteout(cs->hw.hfc.addr | 1, reg);
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ret = bytein(cs->hw.hfc.addr);
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if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
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debugl1(cs, "hfc RD %02x %02x", reg, ret);
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} else
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ret = bytein(cs->hw.hfc.addr | 1);
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return (ret);
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}
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static void
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WriteHFC(struct IsdnCardState *cs, int data, u_char reg, u_char value)
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{
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byteout(cs->hw.hfc.addr | 1, reg);
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cs->hw.hfc.cip = reg;
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if (data)
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byteout(cs->hw.hfc.addr, value);
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if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
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debugl1(cs, "hfc W%c %02x %02x", data ? 'D' : 'C', reg, value);
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}
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static void
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TeleInt_interrupt(int intno, void *dev_id, struct pt_regs *regs)
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{
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struct IsdnCardState *cs = dev_id;
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u_char val;
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if (!cs) {
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printk(KERN_WARNING "TeleInt: Spurious interrupt!\n");
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return;
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}
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val = readreg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_ISTA);
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Start_ISAC:
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if (val)
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isac_interrupt(cs, val);
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val = readreg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_ISTA);
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if (val) {
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if (cs->debug & L1_DEB_ISAC)
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debugl1(cs, "ISAC IntStat after IntRoutine");
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goto Start_ISAC;
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}
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writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_MASK, 0xFF);
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writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_MASK, 0x0);
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}
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static void
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TeleInt_Timer(struct IsdnCardState *cs)
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{
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int stat = 0;
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if (cs->bcs[0].mode) {
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stat |= 1;
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main_irq_hfc(&cs->bcs[0]);
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}
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if (cs->bcs[1].mode) {
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stat |= 2;
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main_irq_hfc(&cs->bcs[1]);
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}
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cs->hw.hfc.timer.expires = jiffies + 1;
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add_timer(&cs->hw.hfc.timer);
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}
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void
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release_io_TeleInt(struct IsdnCardState *cs)
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{
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del_timer(&cs->hw.hfc.timer);
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releasehfc(cs);
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if (cs->hw.hfc.addr)
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release_region(cs->hw.hfc.addr, 2);
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}
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static void
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reset_TeleInt(struct IsdnCardState *cs)
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{
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long flags;
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printk(KERN_INFO "TeleInt: resetting card\n");
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cs->hw.hfc.cirm |= HFC_RESET;
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byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm); /* Reset On */
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save_flags(flags);
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sti();
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current->state = TASK_INTERRUPTIBLE;
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schedule_timeout((30*HZ)/1000);
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cs->hw.hfc.cirm &= ~HFC_RESET;
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byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm); /* Reset Off */
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current->state = TASK_INTERRUPTIBLE;
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schedule_timeout((10*HZ)/1000);
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restore_flags(flags);
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}
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static int
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TeleInt_card_msg(struct IsdnCardState *cs, int mt, void *arg)
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{
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switch (mt) {
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case CARD_RESET:
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reset_TeleInt(cs);
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return(0);
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case CARD_RELEASE:
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release_io_TeleInt(cs);
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return(0);
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case CARD_INIT:
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inithfc(cs);
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clear_pending_isac_ints(cs);
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initisac(cs);
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/* Reenable all IRQ */
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cs->writeisac(cs, ISAC_MASK, 0);
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cs->writeisac(cs, ISAC_CMDR, 0x41);
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cs->hw.hfc.timer.expires = jiffies + 1;
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add_timer(&cs->hw.hfc.timer);
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return(0);
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case CARD_TEST:
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return(0);
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}
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return(0);
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}
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__initfunc(int
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setup_TeleInt(struct IsdnCard *card))
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{
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struct IsdnCardState *cs = card->cs;
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char tmp[64];
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strcpy(tmp, TeleInt_revision);
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printk(KERN_INFO "HiSax: TeleInt driver Rev. %s\n", HiSax_getrev(tmp));
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if (cs->typ != ISDN_CTYPE_TELEINT)
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return (0);
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cs->hw.hfc.addr = card->para[1] & 0x3fe;
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cs->irq = card->para[0];
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cs->hw.hfc.cirm = HFC_CIRM;
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cs->hw.hfc.isac_spcr = 0x00;
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cs->hw.hfc.cip = 0;
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cs->hw.hfc.ctmt = HFC_CTMT | HFC_CLTIMER;
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cs->bcs[0].hw.hfc.send = NULL;
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cs->bcs[1].hw.hfc.send = NULL;
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cs->hw.hfc.fifosize = 7 * 1024 + 512;
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cs->hw.hfc.timer.function = (void *) TeleInt_Timer;
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cs->hw.hfc.timer.data = (long) cs;
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init_timer(&cs->hw.hfc.timer);
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if (check_region((cs->hw.hfc.addr), 2)) {
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printk(KERN_WARNING
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"HiSax: %s config port %x-%x already in use\n",
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CardType[card->typ],
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cs->hw.hfc.addr,
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cs->hw.hfc.addr + 2);
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return (0);
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} else {
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request_region(cs->hw.hfc.addr, 2, "TeleInt isdn");
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}
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/* HW IO = IO */
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byteout(cs->hw.hfc.addr, cs->hw.hfc.addr & 0xff);
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byteout(cs->hw.hfc.addr | 1, ((cs->hw.hfc.addr & 0x300) >> 8) | 0x54);
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switch (cs->irq) {
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case 3:
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cs->hw.hfc.cirm |= HFC_INTA;
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break;
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case 4:
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cs->hw.hfc.cirm |= HFC_INTB;
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break;
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case 5:
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cs->hw.hfc.cirm |= HFC_INTC;
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break;
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case 7:
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cs->hw.hfc.cirm |= HFC_INTD;
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break;
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case 10:
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cs->hw.hfc.cirm |= HFC_INTE;
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break;
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case 11:
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cs->hw.hfc.cirm |= HFC_INTF;
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break;
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default:
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printk(KERN_WARNING "TeleInt: wrong IRQ\n");
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release_io_TeleInt(cs);
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return (0);
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}
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byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm);
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byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.ctmt);
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printk(KERN_INFO
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"TeleInt: defined at 0x%x IRQ %d\n",
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cs->hw.hfc.addr,
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cs->irq);
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reset_TeleInt(cs);
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cs->readisac = &ReadISAC;
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cs->writeisac = &WriteISAC;
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cs->readisacfifo = &ReadISACfifo;
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cs->writeisacfifo = &WriteISACfifo;
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cs->BC_Read_Reg = &ReadHFC;
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cs->BC_Write_Reg = &WriteHFC;
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cs->cardmsg = &TeleInt_card_msg;
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cs->irq_func = &TeleInt_interrupt;
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ISACVersion(cs, "TeleInt:");
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return (1);
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}
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