# sportster.c

    /* $Id$

     * sportster.c     low level stuff for USR Sportster internal TA
     *
     * Author       Karsten Keil (keil@temic-ech.spacenet.de)
     *
     * Thanks to Christian "naddy" Weisgerber (3Com, US Robotics) for documentation
     *
     * $Log$
     * Revision 1.6  1998/04/15 16:44:35  keil
     * new init code
     *
     * Revision 1.5  1998/02/02 13:29:46  keil
     * fast io
     *
     * Revision 1.4  1997/11/08 21:35:52  keil
     * new l1 init
     *
     * Revision 1.3  1997/11/06 17:09:29  keil
     * New 2.1 init code
     *
     * Revision 1.2  1997/10/29 18:51:18  keil
     * New files
     *
     * Revision 1.1.2.1  1997/10/17 22:10:58  keil
     * new files on 2.0
     *
     */
    #define __NO_VERSION__
    #include "hisax.h"
    #include "isac.h"
    #include "hscx.h"
    #include "isdnl1.h"

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

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

    #define	 SPORTSTER_ISAC		0xC000
    #define	 SPORTSTER_HSCXA	0x0000
    #define	 SPORTSTER_HSCXB	0x4000
    #define	 SPORTSTER_RES_IRQ	0x8000
    #define	 SPORTSTER_RESET	0x80
    #define	 SPORTSTER_INTE		0x40

    static inline int
    calc_off(unsigned int base, unsigned int off)
    {
    	return(base + ((off & 0xfc)<<8) + ((off & 3)<<1));
    }

    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 (bytein(calc_off(cs->hw.spt.isac, offset)));
    }

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

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

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

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

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

    /*
     * fast interrupt HSCX stuff goes here
     */

    #define READHSCX(cs, nr, reg) bytein(calc_off(cs->hw.spt.hscx[nr], reg))
    #define WRITEHSCX(cs, nr, reg, data) byteout(calc_off(cs->hw.spt.hscx[nr], reg), data)
    #define READHSCXFIFO(cs, nr, ptr, cnt) read_fifo(cs->hw.spt.hscx[nr], ptr, cnt)
    #define WRITEHSCXFIFO(cs, nr, ptr, cnt) write_fifo(cs->hw.spt.hscx[nr], ptr, cnt)

    #include "hscx_irq.c"

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

    	if (!cs) {
    		printk(KERN_WARNING "Sportster: Spurious interrupt!\n");
    		return;
    	}
    	val = READHSCX(cs, 1, HSCX_ISTA);
          Start_HSCX:
    	if (val)
    		hscx_int_main(cs, val);
    	val = ReadISAC(cs, ISAC_ISTA);
          Start_ISAC:
    	if (val)
    		isac_interrupt(cs, val);
    	val = READHSCX(cs, 1, HSCX_ISTA);
    	if (val) {
    		if (cs->debug & L1_DEB_HSCX)
    			debugl1(cs, "HSCX IntStat after IntRoutine");
    		goto Start_HSCX;
    	}
    	val = ReadISAC(cs, ISAC_ISTA);
    	if (val) {
    		if (cs->debug & L1_DEB_ISAC)
    			debugl1(cs, "ISAC IntStat after IntRoutine");
    		goto Start_ISAC;
    	}
    	/* get a new irq impulse if there any pending */
    	bytein(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ +1);
    }

    void
    release_io_sportster(struct IsdnCardState *cs)
    {
    	int i, adr;

    	byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, 0);
    	for (i=0; i<64; i++) {
    		adr = cs->hw.spt.cfg_reg + i *1024;
    		release_region(adr, 8);
    	}
    }

    void
    reset_sportster(struct IsdnCardState *cs)
    {
    	long flags;

    	cs->hw.spt.res_irq |= SPORTSTER_RESET; /* Reset On */
    	byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, cs->hw.spt.res_irq);
    	save_flags(flags);
    	sti();
    	current->state = TASK_INTERRUPTIBLE;
    	current->timeout = jiffies + 1;
    	schedule();
    	cs->hw.spt.res_irq &= ~SPORTSTER_RESET; /* Reset Off */
    	byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, cs->hw.spt.res_irq);
    	current->state = TASK_INTERRUPTIBLE;
    	current->timeout = jiffies + 1;
    	schedule();
    	restore_flags(flags);
    }

    static int
    Sportster_card_msg(struct IsdnCardState *cs, int mt, void *arg)
    {
    	switch (mt) {
    		case CARD_RESET:
    			reset_sportster(cs);
    			return(0);
    		case CARD_RELEASE:
    			release_io_sportster(cs);
    			return(0);
    		case CARD_SETIRQ:
    			return(request_irq(cs->irq, &sportster_interrupt,
    					I4L_IRQ_FLAG, "HiSax", cs));
    		case CARD_INIT:
    			inithscxisac(cs, 1);
    			cs->hw.spt.res_irq |= SPORTSTER_INTE; /* IRQ On */
    			byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, cs->hw.spt.res_irq);
    			inithscxisac(cs, 2);
    			return(0);
    		case CARD_TEST:
    			return(0);
    	}
    	return(0);
    }

    __initfunc(int
    get_io_range(struct IsdnCardState *cs))
    {
    	int i, j, adr;

    	for (i=0;i<64;i++) {
    		adr = cs->hw.spt.cfg_reg + i *1024;
    		if (check_region(adr, 8)) {
    			printk(KERN_WARNING
    				"HiSax: %s config port %x-%x already in use\n",
    				CardType[cs->typ], adr, adr + 8);
    			break;
    		} else
    			request_region(adr, 8, "sportster");
    	}
    	if (i==64)
    		return(1);
    	else {
    		for (j=0; j<i; j++) {
    			adr = cs->hw.spt.cfg_reg + j *1024;
    			release_region(adr, 8);
    		}
    		return(0);
    	}
    }

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

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

    	cs->hw.spt.cfg_reg = card->para[1];
    	cs->irq = card->para[0];
    	if (!get_io_range(cs))
    		return (0);
    	cs->hw.spt.isac = cs->hw.spt.cfg_reg + SPORTSTER_ISAC;
    	cs->hw.spt.hscx[0] = cs->hw.spt.cfg_reg + SPORTSTER_HSCXA;
    	cs->hw.spt.hscx[1] = cs->hw.spt.cfg_reg + SPORTSTER_HSCXB;

    	switch(cs->irq) {
    		case 5:	cs->hw.spt.res_irq = 1;
    			break;
    		case 7:	cs->hw.spt.res_irq = 2;
    			break;
    		case 10:cs->hw.spt.res_irq = 3;
    			break;
    		case 11:cs->hw.spt.res_irq = 4;
    			break;
    		case 12:cs->hw.spt.res_irq = 5;
    			break;
    		case 14:cs->hw.spt.res_irq = 6;
    			break;
    		case 15:cs->hw.spt.res_irq = 7;
    			break;
    		default:release_io_sportster(cs);
    			printk(KERN_WARNING "Sportster: wrong IRQ\n");
    			return(0);
    	}
    	reset_sportster(cs);
    	printk(KERN_INFO
    	       "HiSax: %s config irq:%d cfg:0x%X\n",
    	       CardType[cs->typ], cs->irq,
    	       cs->hw.spt.cfg_reg);

    	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 = &Sportster_card_msg;
    	ISACVersion(cs, "Sportster:");
    	if (HscxVersion(cs, "Sportster:")) {
    		printk(KERN_WARNING
    		       "Sportster: wrong HSCX versions check IO address\n");
    		release_io_sportster(cs);
    		return (0);
    	}
    	return (1);
    }