/* $Id: saphir.c,v 1.10.2.4 2004/01/13 23:48:39 keil Exp $
   *
   * low level stuff for HST Saphir 1
   *
   * 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    HST High Soft Tech GmbH
   *
   */
  
  #include <linux/init.h>
  #include "hisax.h"
  #include "isac.h"
  #include "hscx.h"
  #include "isdnl1.h"
  
  static char *saphir_rev = "$Revision: 1.10.2.4 $";
  
  #define byteout(addr, val) outb(val, addr)
  #define bytein(addr) inb(addr)
  
  #define ISAC_DATA	0
  #define HSCX_DATA	1
  #define ADDRESS_REG	2
  #define IRQ_REG		3
  #define SPARE_REG	4
  #define RESET_REG	5
  
  static inline u_char
  readreg(unsigned int ale, unsigned int adr, u_char off)
  {
  	register u_char ret;
  
  	byteout(ale, off);
  	ret = bytein(adr);
  	return (ret);
  }
  
  static inline void
  readfifo(unsigned int ale, unsigned int adr, u_char off, u_char *data, int size)
  {
  	byteout(ale, off);
  	insb(adr, data, size);
  }
  
  
  static inline void
  writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
  {
  	byteout(ale, off);
  	byteout(adr, data);
  }
  
  static inline void
  writefifo(unsigned int ale, unsigned int adr, u_char off, u_char *data, int size)
  {
  	byteout(ale, off);
  	outsb(adr, data, size);
  }
  
  /* Interface functions */
  
  static u_char
  ReadISAC(struct IsdnCardState *cs, u_char offset)
  {
  	return (readreg(cs->hw.saphir.ale, cs->hw.saphir.isac, offset));
  }
  
  static void
  WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  {
  	writereg(cs->hw.saphir.ale, cs->hw.saphir.isac, offset, value);
  }
  
  static void
  ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  {
  	readfifo(cs->hw.saphir.ale, cs->hw.saphir.isac, 0, data, size);
  }
  
  static void
  WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  {
  	writefifo(cs->hw.saphir.ale, cs->hw.saphir.isac, 0, data, size);
  }
  
  static u_char
  ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
  {
  	return (readreg(cs->hw.saphir.ale, cs->hw.saphir.hscx,
  			offset + (hscx ? 0x40 : 0)));
  }
  
  static void
  WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
  {
  	writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx,
  		 offset + (hscx ? 0x40 : 0), value);
  }
  
  #define READHSCX(cs, nr, reg) readreg(cs->hw.saphir.ale,		\
  				      cs->hw.saphir.hscx, reg + (nr ? 0x40 : 0))
  #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.saphir.ale,	\
  					      cs->hw.saphir.hscx, reg + (nr ? 0x40 : 0), data)
  
  #define READHSCXFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.saphir.ale,	\
  						cs->hw.saphir.hscx, (nr ? 0x40 : 0), ptr, cnt)
  
  #define WRITEHSCXFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.saphir.ale,	\
  						  cs->hw.saphir.hscx, (nr ? 0x40 : 0), ptr, cnt)
  
  #include "hscx_irq.c"
  
  static irqreturn_t
  saphir_interrupt(int intno, void *dev_id)
  {
  	struct IsdnCardState *cs = dev_id;
  	u_char val;
  	u_long flags;
  
  	spin_lock_irqsave(&cs->lock, flags);
  	val = readreg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_ISTA + 0x40);
  Start_HSCX:
  	if (val)
  		hscx_int_main(cs, val);
  	val = readreg(cs->hw.saphir.ale, cs->hw.saphir.isac, ISAC_ISTA);
  Start_ISAC:
  	if (val)
  		isac_interrupt(cs, val);
  	val = readreg(cs->hw.saphir.ale, cs->hw.saphir.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.saphir.ale, cs->hw.saphir.isac, ISAC_ISTA);
  	if (val) {
  		if (cs->debug & L1_DEB_ISAC)
  			debugl1(cs, "ISAC IntStat after IntRoutine");
  		goto Start_ISAC;
  	}
  	/* Watchdog */
  	if (cs->hw.saphir.timer.function)
  		mod_timer(&cs->hw.saphir.timer, jiffies + 1 * HZ);
  	else
  		printk(KERN_WARNING "saphir: Spurious timer!
  ");
  	writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK, 0xFF);
  	writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK + 0x40, 0xFF);
  	writereg(cs->hw.saphir.ale, cs->hw.saphir.isac, ISAC_MASK, 0xFF);
  	writereg(cs->hw.saphir.ale, cs->hw.saphir.isac, ISAC_MASK, 0);
  	writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK, 0);
  	writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK + 0x40, 0);
  	spin_unlock_irqrestore(&cs->lock, flags);
  	return IRQ_HANDLED;
  }
  
  static void
  SaphirWatchDog(struct IsdnCardState *cs)
  {
  	u_long flags;
  
  	spin_lock_irqsave(&cs->lock, flags);
  	/* 5 sec WatchDog, so read at least every 4 sec */
  	cs->readisac(cs, ISAC_RBCH);
  	spin_unlock_irqrestore(&cs->lock, flags);
  	mod_timer(&cs->hw.saphir.timer, jiffies + 1 * HZ);
  }
  
  static void
  release_io_saphir(struct IsdnCardState *cs)
  {
  	byteout(cs->hw.saphir.cfg_reg + IRQ_REG, 0xff);
  	del_timer(&cs->hw.saphir.timer);
  	cs->hw.saphir.timer.function = NULL;
  	if (cs->hw.saphir.cfg_reg)
  		release_region(cs->hw.saphir.cfg_reg, 6);
  }
  
  static int
  saphir_reset(struct IsdnCardState *cs)
  {
  	u_char irq_val;
  
  	switch (cs->irq) {
  	case 5: irq_val = 0;
  		break;
  	case 3: irq_val = 1;
  		break;
  	case 11:
  		irq_val = 2;
  		break;
  	case 12:
  		irq_val = 3;
  		break;
  	case 15:
  		irq_val = 4;
  		break;
  	default:
  		printk(KERN_WARNING "HiSax: saphir wrong IRQ %d
  ",
  		       cs->irq);
  		return (1);
  	}
  	byteout(cs->hw.saphir.cfg_reg + IRQ_REG, irq_val);
  	byteout(cs->hw.saphir.cfg_reg + RESET_REG, 1);
  	mdelay(10);
  	byteout(cs->hw.saphir.cfg_reg + RESET_REG, 0);
  	mdelay(10);
  	byteout(cs->hw.saphir.cfg_reg + IRQ_REG, irq_val);
  	byteout(cs->hw.saphir.cfg_reg + SPARE_REG, 0x02);
  	return (0);
  }
  
  static int
  saphir_card_msg(struct IsdnCardState *cs, int mt, void *arg)
  {
  	u_long flags;
  
  	switch (mt) {
  	case CARD_RESET:
  		spin_lock_irqsave(&cs->lock, flags);
  		saphir_reset(cs);
  		spin_unlock_irqrestore(&cs->lock, flags);
  		return (0);
  	case CARD_RELEASE:
  		release_io_saphir(cs);
  		return (0);
  	case CARD_INIT:
  		spin_lock_irqsave(&cs->lock, flags);
  		inithscxisac(cs, 3);
  		spin_unlock_irqrestore(&cs->lock, flags);
  		return (0);
  	case CARD_TEST:
  		return (0);
  	}
  	return (0);
  }
  
  
  int setup_saphir(struct IsdnCard *card)
  {
  	struct IsdnCardState *cs = card->cs;
  	char tmp[64];
  
  	strcpy(tmp, saphir_rev);
  	printk(KERN_INFO "HiSax: HST Saphir driver Rev. %s
  ", HiSax_getrev(tmp));
  	if (cs->typ != ISDN_CTYPE_HSTSAPHIR)
  		return (0);
  
  	/* IO-Ports */
  	cs->hw.saphir.cfg_reg = card->para[1];
  	cs->hw.saphir.isac = card->para[1] + ISAC_DATA;
  	cs->hw.saphir.hscx = card->para[1] + HSCX_DATA;
  	cs->hw.saphir.ale = card->para[1] + ADDRESS_REG;
  	cs->irq = card->para[0];
  	if (!request_region(cs->hw.saphir.cfg_reg, 6, "saphir")) {
  		printk(KERN_WARNING
  		       "HiSax: HST Saphir config port %x-%x already in use
  ",
  		       cs->hw.saphir.cfg_reg,
  		       cs->hw.saphir.cfg_reg + 5);
  		return (0);
  	}
  
  	printk(KERN_INFO "HiSax: HST Saphir config irq:%d io:0x%X
  ",
  	       cs->irq, cs->hw.saphir.cfg_reg);
  
  	setup_isac(cs);
  	cs->hw.saphir.timer.function = (void *) SaphirWatchDog;
  	cs->hw.saphir.timer.data = (long) cs;
  	init_timer(&cs->hw.saphir.timer);
  	cs->hw.saphir.timer.expires = jiffies + 4 * HZ;
  	add_timer(&cs->hw.saphir.timer);
  	if (saphir_reset(cs)) {
  		release_io_saphir(cs);
  		return (0);
  	}
  	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 = &saphir_card_msg;
  	cs->irq_func = &saphir_interrupt;
  	ISACVersion(cs, "saphir:");
  	if (HscxVersion(cs, "saphir:")) {
  		printk(KERN_WARNING
  		       "saphir: wrong HSCX versions check IO address
  ");
  		release_io_saphir(cs);
  		return (0);
  	}
  	return (1);
  }