# avm_a1.c

    /* $Id$

     * avm_a1.c     low level stuff for AVM A1 (Fritz) isdn cards
     *
     * Author       Karsten Keil (keil@temic-ech.spacenet.de)
     *
     *
     * $Log$
     * Revision 2.8  1998/04/15 16:44:27  keil
     * new init code
     *
     * Revision 2.7  1998/02/02 13:29:37  keil
     * fast io
     *
     * Revision 2.6  1998/01/13 23:09:46  keil
     * really disable timer
     *
     * Revision 2.5  1998/01/02 06:50:29  calle
     * Perodic timer of A1 now disabled, no need for linux driver.
     *
     * Revision 2.4  1997/11/08 21:35:42  keil
     * new l1 init
     *
     * Revision 2.3  1997/11/06 17:13:32  keil
     * New 2.1 init code
     *
     * Revision 2.2  1997/10/29 18:55:48  keil
     * changes for 2.1.60 (irq2dev_map)
     *
     * Revision 2.1  1997/07/27 21:47:13  keil
     * new interface structures
     *
     * Revision 2.0  1997/06/26 11:02:48  keil
     * New Layer and card interface
     *
     * Revision 1.6  1997/04/13 19:54:07  keil
     * Change in IRQ check delay for SMP
     *
     * Revision 1.5  1997/04/06 22:54:10  keil
     * Using SKB's
     *
     * Revision 1.4  1997/01/27 15:50:21  keil
     * SMP proof,cosmetics
     *
     * Revision 1.3  1997/01/21 22:14:20  keil
     * cleanups
     *
     * Revision 1.2  1996/10/27 22:07:31  keil
     * cosmetic changes
     *
     * Revision 1.1  1996/10/13 20:04:49  keil
     * Initial revision
     *
     *
     */
    #define __NO_VERSION__
    #include "hisax.h"
    #include "isac.h"
    #include "hscx.h"
    #include "isdnl1.h"

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

    #define	 AVM_A1_STAT_ISAC	0x01
    #define	 AVM_A1_STAT_HSCX	0x02
    #define	 AVM_A1_STAT_TIMER	0x04

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

    static inline u_char
    readreg(unsigned int adr, u_char off)
    {
    	return (bytein(adr + off));
    }

    static inline void
    writereg(unsigned int adr, u_char off, u_char data)
    {
    	byteout(adr + off, data);
    }

    static inline void
    read_fifo(unsigned int adr, u_char * data, int size)
    {
    	insb(adr, data, size);
    }

    static void
    write_fifo(unsigned int adr, u_char * data, int size)
    {
    	outsb(adr, data, size);
    }

    /* Interface functions */

    static u_char
    ReadISAC(struct IsdnCardState *cs, u_char offset)
    {
    	return (readreg(cs->hw.avm.isac, offset));
    }

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

    static void
    ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
    {
    	read_fifo(cs->hw.avm.isacfifo, data, size);
    }

    static void
    WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
    {
    	write_fifo(cs->hw.avm.isacfifo, data, size);
    }

    static u_char
    ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
    {
    	return (readreg(cs->hw.avm.hscx[hscx], offset));
    }

    static void
    WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
    {
    	writereg(cs->hw.avm.hscx[hscx], offset, value);
    }

    /*
     * fast interrupt HSCX stuff goes here
     */

    #define READHSCX(cs, nr, reg) readreg(cs->hw.avm.hscx[nr], reg)
    #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.avm.hscx[nr], reg, data)
    #define READHSCXFIFO(cs, nr, ptr, cnt) read_fifo(cs->hw.avm.hscxfifo[nr], ptr, cnt)
    #define WRITEHSCXFIFO(cs, nr, ptr, cnt) write_fifo(cs->hw.avm.hscxfifo[nr], ptr, cnt)

    #include "hscx_irq.c"

    static void
    avm_a1_interrupt(int intno, void *dev_id, struct pt_regs *regs)
    {
    	struct IsdnCardState *cs = dev_id;
    	u_char val, sval, stat = 0;
    	char tmp[32];

    	if (!cs) {
    		printk(KERN_WARNING "AVM A1: Spurious interrupt!\n");
    		return;
    	}
    	while (((sval = bytein(cs->hw.avm.cfg_reg)) & 0xf) != 0x7) {
    		if (!(sval & AVM_A1_STAT_TIMER)) {
    			byteout(cs->hw.avm.cfg_reg, 0x1E);
    			sval = bytein(cs->hw.avm.cfg_reg);
    		} else if (cs->debug & L1_DEB_INTSTAT) {
    			sprintf(tmp, "avm IntStatus %x", sval);
    			debugl1(cs, tmp);
    		}
    		if (!(sval & AVM_A1_STAT_HSCX)) {
    			val = readreg(cs->hw.avm.hscx[1], HSCX_ISTA);
    			if (val) {
    				hscx_int_main(cs, val);
    				stat |= 1;
    			}
    		}
    		if (!(sval & AVM_A1_STAT_ISAC)) {
    			val = readreg(cs->hw.avm.isac, ISAC_ISTA);
    			if (val) {
    				isac_interrupt(cs, val);
    				stat |= 2;
    			}
    		}
    	}
    	if (stat & 1) {
    		writereg(cs->hw.avm.hscx[0], HSCX_MASK, 0xFF);
    		writereg(cs->hw.avm.hscx[1], HSCX_MASK, 0xFF);
    		writereg(cs->hw.avm.hscx[0], HSCX_MASK, 0x0);
    		writereg(cs->hw.avm.hscx[1], HSCX_MASK, 0x0);
    	}
    	if (stat & 2) {
    		writereg(cs->hw.avm.isac, ISAC_MASK, 0xFF);
    		writereg(cs->hw.avm.isac, ISAC_MASK, 0x0);
    	}
    }

    inline static void
    release_ioregs(struct IsdnCardState *cs, int mask)
    {
    	release_region(cs->hw.avm.cfg_reg, 8);
    	if (mask & 1)
    		release_region(cs->hw.avm.isac + 32, 32);
    	if (mask & 2)
    		release_region(cs->hw.avm.isacfifo, 1);
    	if (mask & 4)
    		release_region(cs->hw.avm.hscx[0] + 32, 32);
    	if (mask & 8)
    		release_region(cs->hw.avm.hscxfifo[0], 1);
    	if (mask & 0x10)
    		release_region(cs->hw.avm.hscx[1] + 32, 32);
    	if (mask & 0x20)
    		release_region(cs->hw.avm.hscxfifo[1], 1);
    }

    static int
    AVM_card_msg(struct IsdnCardState *cs, int mt, void *arg)
    {
    	switch (mt) {
    		case CARD_RESET:
    			return(0);
    		case CARD_RELEASE:
    			release_ioregs(cs, 0x3f);
    			return(0);
    		case CARD_SETIRQ:
    			return(request_irq(cs->irq, &avm_a1_interrupt,
    					I4L_IRQ_FLAG, "HiSax", cs));
    		case CARD_INIT:
    			inithscxisac(cs, 1);
    			byteout(cs->hw.avm.cfg_reg, 0x16);
    			byteout(cs->hw.avm.cfg_reg, 0x1E);
    			inithscxisac(cs, 2);
    			return(0);
    		case CARD_TEST:
    			return(0);
    	}
    	return(0);
    }

    __initfunc(int
    setup_avm_a1(struct IsdnCard *card))
    {
    	u_char val;
    	struct IsdnCardState *cs = card->cs;
    	long flags;
    	char tmp[64];

    	strcpy(tmp, avm_revision);
    	printk(KERN_INFO "HiSax: AVM driver Rev. %s\n", HiSax_getrev(tmp));
    	if (cs->typ != ISDN_CTYPE_A1)
    		return (0);

    	cs->hw.avm.cfg_reg = card->para[1] + 0x1800;
    	cs->hw.avm.isac = card->para[1] + 0x1400 - 0x20;
    	cs->hw.avm.hscx[0] = card->para[1] + 0x400 - 0x20;
    	cs->hw.avm.hscx[1] = card->para[1] + 0xc00 - 0x20;
    	cs->hw.avm.isacfifo = card->para[1] + 0x1000;
    	cs->hw.avm.hscxfifo[0] = card->para[1];
    	cs->hw.avm.hscxfifo[1] = card->para[1] + 0x800;
    	cs->irq = card->para[0];
    	if (check_region((cs->hw.avm.cfg_reg), 8)) {
    		printk(KERN_WARNING
    		       "HiSax: %s config port %x-%x already in use\n",
    		       CardType[card->typ],
    		       cs->hw.avm.cfg_reg,
    		       cs->hw.avm.cfg_reg + 8);
    		return (0);
    	} else {
    		request_region(cs->hw.avm.cfg_reg, 8, "avm cfg");
    	}
    	if (check_region((cs->hw.avm.isac + 32), 32)) {
    		printk(KERN_WARNING
    		       "HiSax: %s isac ports %x-%x already in use\n",
    		       CardType[cs->typ],
    		       cs->hw.avm.isac + 32,
    		       cs->hw.avm.isac + 64);
    		release_ioregs(cs, 0);
    		return (0);
    	} else {
    		request_region(cs->hw.avm.isac + 32, 32, "HiSax isac");
    	}
    	if (check_region((cs->hw.avm.isacfifo), 1)) {
    		printk(KERN_WARNING
    		       "HiSax: %s isac fifo port %x already in use\n",
    		       CardType[cs->typ],
    		       cs->hw.avm.isacfifo);
    		release_ioregs(cs, 1);
    		return (0);
    	} else {
    		request_region(cs->hw.avm.isacfifo, 1, "HiSax isac fifo");
    	}
    	if (check_region((cs->hw.avm.hscx[0]) + 32, 32)) {
    		printk(KERN_WARNING
    		       "HiSax: %s hscx A ports %x-%x already in use\n",
    		       CardType[cs->typ],
    		       cs->hw.avm.hscx[0] + 32,
    		       cs->hw.avm.hscx[0] + 64);
    		release_ioregs(cs, 3);
    		return (0);
    	} else {
    		request_region(cs->hw.avm.hscx[0] + 32, 32, "HiSax hscx A");
    	}
    	if (check_region(cs->hw.avm.hscxfifo[0], 1)) {
    		printk(KERN_WARNING
    		       "HiSax: %s hscx A fifo port %x already in use\n",
    		       CardType[cs->typ],
    		       cs->hw.avm.hscxfifo[0]);
    		release_ioregs(cs, 7);
    		return (0);
    	} else {
    		request_region(cs->hw.avm.hscxfifo[0], 1, "HiSax hscx A fifo");
    	}
    	if (check_region(cs->hw.avm.hscx[1] + 32, 32)) {
    		printk(KERN_WARNING
    		       "HiSax: %s hscx B ports %x-%x already in use\n",
    		       CardType[cs->typ],
    		       cs->hw.avm.hscx[1] + 32,
    		       cs->hw.avm.hscx[1] + 64);
    		release_ioregs(cs, 0xf);
    		return (0);
    	} else {
    		request_region(cs->hw.avm.hscx[1] + 32, 32, "HiSax hscx B");
    	}
    	if (check_region(cs->hw.avm.hscxfifo[1], 1)) {
    		printk(KERN_WARNING
    		       "HiSax: %s hscx B fifo port %x already in use\n",
    		       CardType[cs->typ],
    		       cs->hw.avm.hscxfifo[1]);
    		release_ioregs(cs, 0x1f);
    		return (0);
    	} else {
    		request_region(cs->hw.avm.hscxfifo[1], 1, "HiSax hscx B fifo");
    	}
    	save_flags(flags);
    	byteout(cs->hw.avm.cfg_reg, 0x0);
    	sti();
    	HZDELAY(HZ / 5 + 1);
    	byteout(cs->hw.avm.cfg_reg, 0x1);
    	HZDELAY(HZ / 5 + 1);
    	byteout(cs->hw.avm.cfg_reg, 0x0);
    	HZDELAY(HZ / 5 + 1);
    	val = cs->irq;
    	if (val == 9)
    		val = 2;
    	byteout(cs->hw.avm.cfg_reg + 1, val);
    	HZDELAY(HZ / 5 + 1);
    	byteout(cs->hw.avm.cfg_reg, 0x0);
    	HZDELAY(HZ / 5 + 1);
    	restore_flags(flags);

    	val = bytein(cs->hw.avm.cfg_reg);
    	printk(KERN_INFO "AVM A1: Byte at %x is %x\n",
    	       cs->hw.avm.cfg_reg, val);
    	val = bytein(cs->hw.avm.cfg_reg + 3);
    	printk(KERN_INFO "AVM A1: Byte at %x is %x\n",
    	       cs->hw.avm.cfg_reg + 3, val);
    	val = bytein(cs->hw.avm.cfg_reg + 2);
    	printk(KERN_INFO "AVM A1: Byte at %x is %x\n",
    	       cs->hw.avm.cfg_reg + 2, val);
    	val = bytein(cs->hw.avm.cfg_reg);
    	printk(KERN_INFO "AVM A1: Byte at %x is %x\n",
    	       cs->hw.avm.cfg_reg, val);

    	printk(KERN_INFO
    	       "HiSax: %s config irq:%d cfg:0x%X\n",
    	       CardType[cs->typ], cs->irq,
    	       cs->hw.avm.cfg_reg);
    	printk(KERN_INFO
    	       "HiSax: isac:0x%X/0x%X\n",
    	       cs->hw.avm.isac + 32, cs->hw.avm.isacfifo);
    	printk(KERN_INFO
    	       "HiSax: hscx A:0x%X/0x%X  hscx B:0x%X/0x%X\n",
    	       cs->hw.avm.hscx[0] + 32, cs->hw.avm.hscxfifo[0],
    	       cs->hw.avm.hscx[1] + 32, cs->hw.avm.hscxfifo[1]);

    	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 = &AVM_card_msg;
    	ISACVersion(cs, "AVM A1:");
    	if (HscxVersion(cs, "AVM A1:")) {
    		printk(KERN_WARNING
    		       "AVM A1: wrong HSCX versions check IO address\n");
    		release_ioregs(cs, 0x3f);
    		return (0);
    	}
    	return (1);
    }