# sedlbauer.c

    /* $Id$

     * sedlbauer.c  low level stuff for Sedlbauer cards
     *              includes Support for the Sedlbauer Speed Star
     *              derived from the original file dynalink.c from Karsten Keil
     *
     * Copyright (C) 1997,1998 Marcus Niemann (for the modifications to
     *                                         the original file dynalink.c)
     *
     * Author     Marcus Niemann (niemann@www-bib.fh-bielefeld.de)
     *
     * Thanks to  Karsten Keil
     *            Sedlbauer AG for informations
     *            Edgar Toernig
     *
     * $Log$
     * Revision 1.7  1998/04/15 16:44:33  keil
     * new init code
     *
     * Revision 1.6  1998/02/09 18:46:06  keil
     * Support for Sedlbauer PCMCIA (Marcus Niemann)
     *
     * Revision 1.5  1998/02/02 13:29:45  keil
     * fast io
     *
     * Revision 1.4  1997/11/08 21:35:52  keil
     * new l1 init
     *
     * Revision 1.3  1997/11/06 17:09:28  keil
     * New 2.1 init code
     *
     * Revision 1.2  1997/10/29 18:55:52  keil
     * changes for 2.1.60 (irq2dev_map)
     *
     * Revision 1.1  1997/09/11 17:32:04  keil
     * new
     *
     *
     */

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

    extern const char *CardType[];

    const char *Sedlbauer_revision = "$Revision$";

    const char *Sedlbauer_Types[] =
    {"None", "Speed Card", "Speed Win", "Speed Star"};

    #define SEDL_SPEED_CARD 1
    #define SEDL_SPEED_WIN  2
    #define SEDL_SPEED_STAR 3

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

    #define SEDL_RESET_ON	0
    #define SEDL_RESET_OFF	1
    #define SEDL_ISAC	2
    #define SEDL_HSCX	3
    #define SEDL_ADR	4

    #define SEDL_PCMCIA_RESET	0
    #define SEDL_PCMCIA_ISAC	1
    #define SEDL_PCMCIA_HSCX	2
    #define SEDL_PCMCIA_ADR		4

    #define SEDL_RESET      0x3	/* same as DOS driver */

    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.sedl.adr, cs->hw.sedl.isac, offset));
    }

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

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

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

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

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

    /*
     * fast interrupt HSCX stuff goes here
     */

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

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

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

    #include "hscx_irq.c"

    static void
    sedlbauer_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 "Sedlbauer: Spurious interrupt!\n");
    		return;
    	}

            if ((cs->typ == ISDN_CTYPE_SEDLBAUER_PCMCIA) && (*cs->busy_flag == 1)) {
              /* The card tends to generate interrupts while being removed
                 causing us to just crash the kernel. bad. */
              printk(KERN_WARNING "Sedlbauer: card not available!\n");
              return;
            }

    	val = readreg(cs->hw.sedl.adr, cs->hw.sedl.hscx, HSCX_ISTA + 0x40);
          Start_HSCX:
    	if (val) {
    		hscx_int_main(cs, val);
    		stat |= 1;
    	}
    	val = readreg(cs->hw.sedl.adr, cs->hw.sedl.isac, ISAC_ISTA);
          Start_ISAC:
    	if (val) {
    		isac_interrupt(cs, val);
    		stat |= 2;
    	}
    	val = readreg(cs->hw.sedl.adr, cs->hw.sedl.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.sedl.adr, cs->hw.sedl.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.sedl.adr, cs->hw.sedl.hscx, HSCX_MASK, 0xFF);
    		writereg(cs->hw.sedl.adr, cs->hw.sedl.hscx, HSCX_MASK + 0x40, 0xFF);
    		writereg(cs->hw.sedl.adr, cs->hw.sedl.hscx, HSCX_MASK, 0x0);
    		writereg(cs->hw.sedl.adr, cs->hw.sedl.hscx, HSCX_MASK + 0x40, 0x0);
    	}
    	if (stat & 2) {
    		writereg(cs->hw.sedl.adr, cs->hw.sedl.isac, ISAC_MASK, 0xFF);
    		writereg(cs->hw.sedl.adr, cs->hw.sedl.isac, ISAC_MASK, 0x0);
    	}
    }

    void
    release_io_sedlbauer(struct IsdnCardState *cs)
    {
    	int bytecnt = 8;

    	if (cs->hw.sedl.cfg_reg)
    		release_region(cs->hw.sedl.cfg_reg, bytecnt);
    }

    static void
    reset_sedlbauer(struct IsdnCardState *cs)
    {
    	long flags;

    	if (cs->typ != ISDN_CTYPE_SEDLBAUER_PCMCIA) {
    		byteout(cs->hw.sedl.reset_on, SEDL_RESET);	/* Reset On */
    		save_flags(flags);
    		sti();
    		current->state = TASK_INTERRUPTIBLE;
    		current->timeout = jiffies + 1;
    		schedule();
    		byteout(cs->hw.sedl.reset_off, 0);	/* Reset Off */
    		current->state = TASK_INTERRUPTIBLE;
    		current->timeout = jiffies + 1;
    		schedule();
    		restore_flags(flags);
    	}
    }

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

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

    	strcpy(tmp, Sedlbauer_revision);
    	printk(KERN_INFO "HiSax: Sedlbauer driver Rev. %s\n", HiSax_getrev(tmp));
     	if (cs->typ == ISDN_CTYPE_SEDLBAUER) {
     		cs->subtyp = SEDL_SPEED_CARD;
     	} else if (cs->typ == ISDN_CTYPE_SEDLBAUER_PCMCIA) {
     		cs->subtyp = SEDL_SPEED_STAR;
     	} else
    		return (0);

    	bytecnt = 8;
    	cs->hw.sedl.cfg_reg = card->para[1];
    	cs->irq = card->para[0];
    	if (cs->subtyp == SEDL_SPEED_STAR) {
    		cs->hw.sedl.adr = cs->hw.sedl.cfg_reg + SEDL_PCMCIA_ADR;
    		cs->hw.sedl.isac = cs->hw.sedl.cfg_reg + SEDL_PCMCIA_ISAC;
    		cs->hw.sedl.hscx = cs->hw.sedl.cfg_reg + SEDL_PCMCIA_HSCX;
    		cs->hw.sedl.reset_on = cs->hw.sedl.cfg_reg + SEDL_PCMCIA_RESET;
    		cs->hw.sedl.reset_off = cs->hw.sedl.cfg_reg + SEDL_PCMCIA_RESET;
    	} else {
    		cs->hw.sedl.adr = cs->hw.sedl.cfg_reg + SEDL_ADR;
    		cs->hw.sedl.isac = cs->hw.sedl.cfg_reg + SEDL_ISAC;
    		cs->hw.sedl.hscx = cs->hw.sedl.cfg_reg + SEDL_HSCX;
    		cs->hw.sedl.reset_on = cs->hw.sedl.cfg_reg + SEDL_RESET_ON;
    		cs->hw.sedl.reset_off = cs->hw.sedl.cfg_reg + SEDL_RESET_OFF;
    	}

    	/* In case of the sedlbauer pcmcia card, this region is in use,
               reserved for us by the card manager. So we do not check it
               here, it would fail. */
    	if (cs->typ != ISDN_CTYPE_SEDLBAUER_PCMCIA &&
    	   check_region((cs->hw.sedl.cfg_reg), bytecnt)) {
    		printk(KERN_WARNING
    		       "HiSax: %s config port %x-%x already in use\n",
    		       CardType[card->typ],
    		       cs->hw.sedl.cfg_reg,
    		       cs->hw.sedl.cfg_reg + bytecnt);
    		return (0);
    	} else {
    		request_region(cs->hw.sedl.cfg_reg, bytecnt, "sedlbauer isdn");
    	}

    	printk(KERN_INFO
    	       "Sedlbauer: defined at 0x%x IRQ %d\n",
    	       cs->hw.sedl.cfg_reg,
    	       cs->irq);
    	printk(KERN_WARNING
    		       "Sedlbauer %s uses ports 0x%x-0x%x\n",
    		       Sedlbauer_Types[cs->subtyp],
    		       cs->hw.sedl.cfg_reg,
    		       cs->hw.sedl.cfg_reg + bytecnt);

    	printk(KERN_INFO "Sedlbauer: resetting card\n");
    	reset_sedlbauer(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 = &Sedl_card_msg;
    	ISACVersion(cs, "Sedlbauer:");
    	if (HscxVersion(cs, "Sedlbauer:")) {
    		printk(KERN_WARNING
    		    "Sedlbauer: wrong HSCX versions check IO address\n");
    		release_io_sedlbauer(cs);
    		return (0);
    	}
    	return (1);
    }