text: /* $Id: sportster.c,v 1.16.2.4 2004/01/13 23:48:39 keil Exp $
   *
   * low level stuff for USR Sportster internal TA
   *
   * Author       Karsten Keil
   * Copyright    by Karsten Keil      <keil@isdn4linux.de>
   * 
   * This software may be used and distributed according to the terms
   * of the GNU General Public License, incorporated herein by reference.
   *
   * Thanks to Christian "naddy" Weisgerber (3Com, US Robotics) for documentation
   *
   *
   */
  #include <linux/init.h>
  #include "hisax.h"
  #include "isac.h"
  #include "hscx.h"
  #include "isdnl1.h"
  
  extern const char *CardType[];
  static const char *sportster_revision = "$Revision: 1.16.2.4 $";
  
  #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 irqreturn_t
  sportster_interrupt(int intno, void *dev_id, struct pt_regs *regs)
  {
  	struct IsdnCardState *cs = dev_id;
  	u_char val;
  	u_long flags;
  
  	spin_lock_irqsave(&cs->lock, flags);
  	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);
  	spin_unlock_irqrestore(&cs->lock, flags);
  	return IRQ_HANDLED;
  }
  
  static 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);
  	}
  }
  
  static void
  reset_sportster(struct IsdnCardState *cs)
  {
  	cs->hw.spt.res_irq |= SPORTSTER_RESET; /* Reset On */
  	byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, cs->hw.spt.res_irq);
  	mdelay(10);
  	cs->hw.spt.res_irq &= ~SPORTSTER_RESET; /* Reset Off */
  	byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, cs->hw.spt.res_irq);
  	mdelay(10);
  }
  
  static int
  Sportster_card_msg(struct IsdnCardState *cs, int mt, void *arg)
  {
  	u_long flags;
  
  	switch (mt) {
  		case CARD_RESET:
  			spin_lock_irqsave(&cs->lock, flags);
  			reset_sportster(cs);
  			spin_unlock_irqrestore(&cs->lock, flags);
  			return(0);
  		case CARD_RELEASE:
  			release_io_sportster(cs);
  			return(0);
  		case CARD_INIT:
  			spin_lock_irqsave(&cs->lock, flags);
  			reset_sportster(cs);
  			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);
  			spin_unlock_irqrestore(&cs->lock, flags);
  			return(0);
  		case CARD_TEST:
  			return(0);
  	}
  	return(0);
  }
  
  static int __init
  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 (!request_region(adr, 8, "sportster")) {
  			printk(KERN_WARNING
  				"HiSax: %s config port %x-%x already in use\n",
  				CardType[cs->typ], adr, adr + 8);
  			break;
  		} 
  	}
  	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);
  	}
  }
  
  int __init
  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);
  	}
  	printk(KERN_INFO "HiSax: %s config irq:%d cfg:0x%X\n",
  		CardType[cs->typ], cs->irq, cs->hw.spt.cfg_reg);
  	setup_isac(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 = &Sportster_card_msg;
  	cs->irq_func = &sportster_interrupt;
  	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);
  }
  