# ix1_micro.c

    /* $Id$

     * ix1_micro.c  low level stuff for ITK ix1-micro Rev.2 isdn cards
     *              derived from the original file teles3.c from Karsten Keil
     *
     * Copyright (C) 1997 Klaus-Peter Nischke (ITK AG) (for the modifications to
     *                                                  the original file teles.c)
     *
     * Thanks to    Jan den Ouden
     *              Fritz Elfert
     *              Beat Doebeli
     *
     * $Log$
     * Revision 2.7  1998/04/15 16:44:31  keil
     * new init code
     *
     * Revision 2.6  1998/02/11 17:28:09  keil
     * Niccy PnP/PCI support
     *
     * Revision 2.5  1998/02/02 13:29:42  keil
     * fast io
     *
     * Revision 2.4  1997/11/08 21:35:50  keil
     * new l1 init
     *
     * Revision 2.3  1997/11/06 17:09:35  keil
     * New 2.1 init code
     *
     * Revision 2.2  1997/10/29 18:55:51  keil
     * changes for 2.1.60 (irq2dev_map)
     *
     * Revision 2.1  1997/07/27 21:47:09  keil
     * new interface structures
     *
     * Revision 2.0  1997/06/26 11:02:50  keil
     * New Layer and card interface
     *
     * Revision 1.3  1997/04/13 19:54:02  keil
     * Change in IRQ check delay for SMP
     *
     * Revision 1.2  1997/04/06 22:54:21  keil
     * Using SKB's
     *
     * Revision 1.1  1997/01/27 15:43:10  keil
     * first version
     *
     *
     */

    /*
       For the modification done by the author the following terms and conditions
       apply (GNU PUBLIC LICENSE)

       This program is free software; you can redistribute it and/or modify
       it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or
       (at your option) any later version.

       This program is distributed in the hope that it will be useful,
       but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
       GNU General Public License for more details.

       You should have received a copy of the GNU General Public License
       along with this program; if not, write to the Free Software
       Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

       You may contact Klaus-Peter Nischke by email: klaus@nischke.do.eunet.de
       or by conventional mail:

       Klaus-Peter Nischke
       Deusener Str. 287
       44369 Dortmund
       Germany
     */

    #define __NO_VERSION__
    #include "hisax.h"
    #include "isac.h"
    #include "hscx.h"
    #include "isdnl1.h"

    extern const char *CardType[];
    const char *ix1_revision = "$Revision$";

    #define byteout(addr,val) outb(val,addr)
    #define bytein(addr) inb(addr)

    #define SPECIAL_PORT_OFFSET 3

    #define ISAC_COMMAND_OFFSET 2
    #define ISAC_DATA_OFFSET 0
    #define HSCX_COMMAND_OFFSET 2
    #define HSCX_DATA_OFFSET 1

    #define TIMEOUT 50

    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.ix1.isac_ale, cs->hw.ix1.isac, offset));
    }

    static void
    WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
    {
    	writereg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, offset, value);
    }

    static void
    ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
    {
    	readfifo(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, 0, data, size);
    }

    static void
    WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
    {
    	writefifo(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, 0, data, size);
    }

    static u_char
    ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
    {
    	return (readreg(cs->hw.ix1.hscx_ale,
    			cs->hw.ix1.hscx, offset + (hscx ? 0x40 : 0)));
    }

    static void
    WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
    {
    	writereg(cs->hw.ix1.hscx_ale,
    		 cs->hw.ix1.hscx, offset + (hscx ? 0x40 : 0), value);
    }

    #define READHSCX(cs, nr, reg) readreg(cs->hw.ix1.hscx_ale, \
    		cs->hw.ix1.hscx, reg + (nr ? 0x40 : 0))
    #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.ix1.hscx_ale, \
    		cs->hw.ix1.hscx, reg + (nr ? 0x40 : 0), data)

    #define READHSCXFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.ix1.hscx_ale, \
    		cs->hw.ix1.hscx, (nr ? 0x40 : 0), ptr, cnt)

    #define WRITEHSCXFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.ix1.hscx_ale, \
    		cs->hw.ix1.hscx, (nr ? 0x40 : 0), ptr, cnt)

    #include "hscx_irq.c"

    static void
    ix1micro_interrupt(int intno, void *dev_id, struct pt_regs *regs)
    {
    	struct IsdnCardState *cs = dev_id;
    	u_char val, stat = 0;

    	if (!cs) {
    		printk(KERN_WARNING "IX1: Spurious interrupt!\n");
    		return;
    	}
    	val = readreg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_ISTA + 0x40);
          Start_HSCX:
    	if (val) {
    		hscx_int_main(cs, val);
    		stat |= 1;
    	}
    	val = readreg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, ISAC_ISTA);
          Start_ISAC:
    	if (val) {
    		isac_interrupt(cs, val);
    		stat |= 2;
    	}
    	val = readreg(cs->hw.ix1.hscx_ale, cs->hw.ix1.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.ix1.isac_ale, cs->hw.ix1.isac, ISAC_ISTA);
    	if (val) {
    		if (cs->debug & L1_DEB_ISAC)
    			debugl1(cs, "ISAC IntStat after IntRoutine");
    		goto Start_ISAC;
    	}
    	if (stat & 1) {
    		writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK, 0xFF);
    		writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK + 0x40, 0xFF);
    		writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK, 0);
    		writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK + 0x40, 0);
    	}
    	if (stat & 2) {
    		writereg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, ISAC_MASK, 0xFF);
    		writereg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, ISAC_MASK, 0);
    	}
    }

    void
    release_io_ix1micro(struct IsdnCardState *cs)
    {
    	if (cs->hw.ix1.cfg_reg)
    		release_region(cs->hw.ix1.cfg_reg, 4);
    }

    static void
    ix1_reset(struct IsdnCardState *cs)
    {
    	long flags;
    	int cnt;

    	/* reset isac */
    	save_flags(flags);
    	cnt = 3 * (HZ / 10) + 1;
    	sti();
    	while (cnt--) {
    		byteout(cs->hw.ix1.cfg_reg + SPECIAL_PORT_OFFSET, 1);
    		HZDELAY(1);	/* wait >=10 ms */
    	}
    	byteout(cs->hw.ix1.cfg_reg + SPECIAL_PORT_OFFSET, 0);
    	restore_flags(flags);
    }

    static int
    ix1_card_msg(struct IsdnCardState *cs, int mt, void *arg)
    {
    	switch (mt) {
    		case CARD_RESET:
    			ix1_reset(cs);
    			return(0);
    		case CARD_RELEASE:
    			release_io_ix1micro(cs);
    			return(0);
    		case CARD_SETIRQ:
    			return(request_irq(cs->irq, &ix1micro_interrupt,
    					I4L_IRQ_FLAG, "HiSax", cs));
    		case CARD_INIT:
    			inithscxisac(cs, 3);
    			return(0);
    		case CARD_TEST:
    			return(0);
    	}
    	return(0);
    }

    __initfunc(int
    setup_ix1micro(struct IsdnCard *card))
    {
    	struct IsdnCardState *cs = card->cs;
    	char tmp[64];

    	strcpy(tmp, ix1_revision);
    	printk(KERN_INFO "HiSax: ITK IX1 driver Rev. %s\n", HiSax_getrev(tmp));
    	if (cs->typ != ISDN_CTYPE_IX1MICROR2)
    		return (0);

    	/* IO-Ports */
    	cs->hw.ix1.isac_ale = card->para[1] + ISAC_COMMAND_OFFSET;
    	cs->hw.ix1.hscx_ale = card->para[1] + HSCX_COMMAND_OFFSET;
    	cs->hw.ix1.isac = card->para[1] + ISAC_DATA_OFFSET;
    	cs->hw.ix1.hscx = card->para[1] + HSCX_DATA_OFFSET;
    	cs->hw.ix1.cfg_reg = card->para[1];
    	cs->irq = card->para[0];
    	if (cs->hw.ix1.cfg_reg) {
    		if (check_region((cs->hw.ix1.cfg_reg), 4)) {
    			printk(KERN_WARNING
    			  "HiSax: %s config port %x-%x already in use\n",
    			       CardType[card->typ],
    			       cs->hw.ix1.cfg_reg,
    			       cs->hw.ix1.cfg_reg + 4);
    			return (0);
    		} else
    			request_region(cs->hw.ix1.cfg_reg, 4, "ix1micro cfg");
    	}
    	printk(KERN_INFO
    	       "HiSax: %s config irq:%d io:0x%X\n",
    	       CardType[cs->typ], cs->irq,
    	       cs->hw.ix1.cfg_reg);
    	ix1_reset(cs);
    	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 = &ix1_card_msg;
    	ISACVersion(cs, "ix1-Micro:");
    	if (HscxVersion(cs, "ix1-Micro:")) {
    		printk(KERN_WARNING
    		    "ix1-Micro: wrong HSCX versions check IO address\n");
    		release_io_ix1micro(cs);
    		return (0);
    	}
    	return (1);
    }