/* $Id: mic.c,v 1.12.2.4 2004/01/13 23:48:39 keil Exp $
   *
   * low level stuff for mic cards
   *
   * Author       Stephan von Krawczynski
   * Copyright    by Stephan von Krawczynski <skraw@ithnet.com>
   *
   * This software may be used and distributed according to the terms
   * of the GNU General Public License, incorporated herein by reference.
   *
   */
  
  #include <linux/init.h>
  #include "hisax.h"
  #include "isac.h"
  #include "hscx.h"
  #include "isdnl1.h"
  
  static const char *mic_revision = "$Revision: 1.12.2.4 $";
  
  #define byteout(addr, val) outb(val, addr)
  #define bytein(addr) inb(addr)
  
  #define MIC_ISAC	2
  #define MIC_HSCX	1
  #define MIC_ADR		7
  
  /* CARD_ADR (Write) */
  #define MIC_RESET      0x3	/* same as DOS driver */
  
  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.mic.adr, cs->hw.mic.isac, offset));
  }
  
  static void
  WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  {
  	writereg(cs->hw.mic.adr, cs->hw.mic.isac, offset, value);
  }
  
  static void
  ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  {
  	readfifo(cs->hw.mic.adr, cs->hw.mic.isac, 0, data, size);
  }
  
  static void
  WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  {
  	writefifo(cs->hw.mic.adr, cs->hw.mic.isac, 0, data, size);
  }
  
  static u_char
  ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
  {
  	return (readreg(cs->hw.mic.adr,
  			cs->hw.mic.hscx, offset + (hscx ? 0x40 : 0)));
  }
  
  static void
  WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
  {
  	writereg(cs->hw.mic.adr,
  		 cs->hw.mic.hscx, offset + (hscx ? 0x40 : 0), value);
  }
  
  /*
   * fast interrupt HSCX stuff goes here
   */
  
  #define READHSCX(cs, nr, reg) readreg(cs->hw.mic.adr,			\
  				      cs->hw.mic.hscx, reg + (nr ? 0x40 : 0))
  #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.mic.adr,		\
  					      cs->hw.mic.hscx, reg + (nr ? 0x40 : 0), data)
  
  #define READHSCXFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.mic.adr,		\
  						cs->hw.mic.hscx, (nr ? 0x40 : 0), ptr, cnt)
  
  #define WRITEHSCXFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.mic.adr,	\
  						  cs->hw.mic.hscx, (nr ? 0x40 : 0), ptr, cnt)
  
  #include "hscx_irq.c"
  
  static irqreturn_t
  mic_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.mic.adr, cs->hw.mic.hscx, HSCX_ISTA + 0x40);
  Start_HSCX:
  	if (val)
  		hscx_int_main(cs, val);
  	val = readreg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_ISTA);
  Start_ISAC:
  	if (val)
  		isac_interrupt(cs, val);
  	val = readreg(cs->hw.mic.adr, cs->hw.mic.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.mic.adr, cs->hw.mic.isac, ISAC_ISTA);
  	if (val) {
  		if (cs->debug & L1_DEB_ISAC)
  			debugl1(cs, "ISAC IntStat after IntRoutine");
  		goto Start_ISAC;
  	}
  	writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0xFF);
  	writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0xFF);
  	writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0xFF);
  	writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0x0);
  	writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0x0);
  	writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0x0);
  	spin_unlock_irqrestore(&cs->lock, flags);
  	return IRQ_HANDLED;
  }
  
  static void
  release_io_mic(struct IsdnCardState *cs)
  {
  	int bytecnt = 8;
  
  	if (cs->hw.mic.cfg_reg)
  		release_region(cs->hw.mic.cfg_reg, bytecnt);
  }
  
  static int
  mic_card_msg(struct IsdnCardState *cs, int mt, void *arg)
  {
  	u_long flags;
  
  	switch (mt) {
  	case CARD_RESET:
  		return (0);
  	case CARD_RELEASE:
  		release_io_mic(cs);
  		return (0);
  	case CARD_INIT:
  		spin_lock_irqsave(&cs->lock, flags);
  		inithscx(cs); /* /RTSA := ISAC RST */
  		inithscxisac(cs, 3);
  		spin_unlock_irqrestore(&cs->lock, flags);
  		return (0);
  	case CARD_TEST:
  		return (0);
  	}
  	return (0);
  }
  
  int setup_mic(struct IsdnCard *card)
  {
  	int bytecnt;
  	struct IsdnCardState *cs = card->cs;
  	char tmp[64];
  
  	strcpy(tmp, mic_revision);
  	printk(KERN_INFO "HiSax: mic driver Rev. %s
  ", HiSax_getrev(tmp));
  	if (cs->typ != ISDN_CTYPE_MIC)
  		return (0);
  
  	bytecnt = 8;
  	cs->hw.mic.cfg_reg = card->para[1];
  	cs->irq = card->para[0];
  	cs->hw.mic.adr = cs->hw.mic.cfg_reg + MIC_ADR;
  	cs->hw.mic.isac = cs->hw.mic.cfg_reg + MIC_ISAC;
  	cs->hw.mic.hscx = cs->hw.mic.cfg_reg + MIC_HSCX;
  
  	if (!request_region(cs->hw.mic.cfg_reg, bytecnt, "mic isdn")) {
  		printk(KERN_WARNING
  		       "HiSax: ith mic config port %x-%x already in use
  ",
  		       cs->hw.mic.cfg_reg,
  		       cs->hw.mic.cfg_reg + bytecnt);
  		return (0);
  	}
  	printk(KERN_INFO "mic: defined at 0x%x IRQ %d
  ",
  	       cs->hw.mic.cfg_reg, cs->irq);
  	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 = &mic_card_msg;
  	cs->irq_func = &mic_interrupt;
  	ISACVersion(cs, "mic:");
  	if (HscxVersion(cs, "mic:")) {
  		printk(KERN_WARNING
  		       "mic: wrong HSCX versions check IO address
  ");
  		release_io_mic(cs);
  		return (0);
  	}
  	return (1);
  }