/* $Id: ix1_micro.c,v 2.12.2.4 2004/01/13 23:48:39 keil Exp $
   *
   * low level stuff for ITK ix1-micro Rev.2 isdn cards
   * derived from the original file teles3.c from Karsten Keil
   *
   * Author       Klaus-Peter Nischke
   * Copyright    by Klaus-Peter Nischke, ITK AG
   *                                   <klaus@nischke.do.eunet.de>
   *              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.
   *
   * Klaus-Peter Nischke
   * Deusener Str. 287
   * 44369 Dortmund
   * Germany
   */
  
  #include <linux/init.h>
  #include <linux/isapnp.h>
  #include "hisax.h"
  #include "isac.h"
  #include "hscx.h"
  #include "isdnl1.h"

  static const char *ix1_revision = "$Revision: 2.12.2.4 $";

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

  #define bytein(addr) inb(addr)
  
  #define SPECIAL_PORT_OFFSET 3
  
  #define ISAC_COMMAND_OFFSET 2
  #define ISAC_DATA_OFFSET 0
  #define HSCX_COMMAND_OFFSET 2
  #define HSCX_DATA_OFFSET 1
  
  #define TIMEOUT 50
  
  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.ix1.isac_ale, cs->hw.ix1.isac, offset));
  }
  
  static void
  WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  {
  	writereg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, offset, value);
  }
  
  static void

  ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)

  {
  	readfifo(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, 0, data, size);
  }
  
  static void

  WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)

  {
  	writefifo(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, 0, data, size);
  }
  
  static u_char
  ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
  {
  	return (readreg(cs->hw.ix1.hscx_ale,
  			cs->hw.ix1.hscx, offset + (hscx ? 0x40 : 0)));
  }
  
  static void
  WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
  {
  	writereg(cs->hw.ix1.hscx_ale,
  		 cs->hw.ix1.hscx, offset + (hscx ? 0x40 : 0), value);
  }

  #define READHSCX(cs, nr, reg) readreg(cs->hw.ix1.hscx_ale,		\
  				      cs->hw.ix1.hscx, reg + (nr ? 0x40 : 0))
  #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.ix1.hscx_ale,	\
  					      cs->hw.ix1.hscx, reg + (nr ? 0x40 : 0), data)

  #define READHSCXFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.ix1.hscx_ale,	\
  						cs->hw.ix1.hscx, (nr ? 0x40 : 0), ptr, cnt)

  #define WRITEHSCXFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.ix1.hscx_ale,	\
  						  cs->hw.ix1.hscx, (nr ? 0x40 : 0), ptr, cnt)

  
  #include "hscx_irq.c"
  
  static irqreturn_t

  ix1micro_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.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_ISTA + 0x40);

  Start_HSCX:

  	if (val)
  		hscx_int_main(cs, val);
  	val = readreg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, ISAC_ISTA);

  Start_ISAC:

  	if (val)
  		isac_interrupt(cs, val);
  	val = readreg(cs->hw.ix1.hscx_ale, cs->hw.ix1.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.ix1.isac_ale, cs->hw.ix1.isac, ISAC_ISTA);
  	if (val) {
  		if (cs->debug & L1_DEB_ISAC)
  			debugl1(cs, "ISAC IntStat after IntRoutine");
  		goto Start_ISAC;
  	}
  	writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK, 0xFF);
  	writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK + 0x40, 0xFF);
  	writereg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, ISAC_MASK, 0xFF);
  	writereg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, ISAC_MASK, 0);
  	writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK, 0);
  	writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK + 0x40, 0);
  	spin_unlock_irqrestore(&cs->lock, flags);
  	return IRQ_HANDLED;
  }

  static void

  release_io_ix1micro(struct IsdnCardState *cs)
  {
  	if (cs->hw.ix1.cfg_reg)
  		release_region(cs->hw.ix1.cfg_reg, 4);
  }
  
  static void
  ix1_reset(struct IsdnCardState *cs)
  {
  	int cnt;
  
  	/* reset isac */
  	cnt = 3 * (HZ / 10) + 1;
  	while (cnt--) {
  		byteout(cs->hw.ix1.cfg_reg + SPECIAL_PORT_OFFSET, 1);
  		HZDELAY(1);	/* wait >=10 ms */
  	}
  	byteout(cs->hw.ix1.cfg_reg + SPECIAL_PORT_OFFSET, 0);
  }
  
  static int
  ix1_card_msg(struct IsdnCardState *cs, int mt, void *arg)
  {
  	u_long flags;
  
  	switch (mt) {

  	case CARD_RESET:
  		spin_lock_irqsave(&cs->lock, flags);
  		ix1_reset(cs);
  		spin_unlock_irqrestore(&cs->lock, flags);
  		return (0);
  	case CARD_RELEASE:
  		release_io_ix1micro(cs);
  		return (0);
  	case CARD_INIT:
  		spin_lock_irqsave(&cs->lock, flags);
  		ix1_reset(cs);
  		inithscxisac(cs, 3);
  		spin_unlock_irqrestore(&cs->lock, flags);
  		return (0);
  	case CARD_TEST:
  		return (0);

  	}

  	return (0);

  }
  
  #ifdef __ISAPNP__

  static struct isapnp_device_id itk_ids[] = {

  	{ ISAPNP_VENDOR('I', 'T', 'K'), ISAPNP_FUNCTION(0x25),

  	  ISAPNP_VENDOR('I', 'T', 'K'), ISAPNP_FUNCTION(0x25),

  	  (unsigned long) "ITK micro 2" },
  	{ ISAPNP_VENDOR('I', 'T', 'K'), ISAPNP_FUNCTION(0x29),

  	  ISAPNP_VENDOR('I', 'T', 'K'), ISAPNP_FUNCTION(0x29),

  	  (unsigned long) "ITK micro 2." },
  	{ 0, }
  };

  static struct isapnp_device_id *ipid = &itk_ids[0];
  static struct pnp_card *pnp_c = NULL;

  #endif

  int setup_ix1micro(struct IsdnCard *card)

  {
  	struct IsdnCardState *cs = card->cs;
  	char tmp[64];
  
  	strcpy(tmp, ix1_revision);
  	printk(KERN_INFO "HiSax: ITK IX1 driver Rev. %s
  ", HiSax_getrev(tmp));
  	if (cs->typ != ISDN_CTYPE_IX1MICROR2)
  		return (0);
  
  #ifdef __ISAPNP__
  	if (!card->para[1] && isapnp_present()) {
  		struct pnp_dev *pnp_d;

  		while (ipid->card_vendor) {

  			if ((pnp_c = pnp_find_card(ipid->card_vendor,

  						   ipid->card_device, pnp_c))) {

  				pnp_d = NULL;
  				if ((pnp_d = pnp_find_dev(pnp_c,

  							  ipid->vendor, ipid->function, pnp_d))) {

  					int err;
  
  					printk(KERN_INFO "HiSax: %s detected
  ",

  					       (char *)ipid->driver_data);

  					pnp_disable_dev(pnp_d);
  					err = pnp_activate_dev(pnp_d);

  					if (err < 0) {

  						printk(KERN_WARNING "%s: pnp_activate_dev ret(%d)
  ",

  						       __func__, err);
  						return (0);

  					}
  					card->para[1] = pnp_port_start(pnp_d, 0);
  					card->para[0] = pnp_irq(pnp_d, 0);
  					if (!card->para[0] || !card->para[1]) {
  						printk(KERN_ERR "ITK PnP:some resources are missing %ld/%lx
  ",

  						       card->para[0], card->para[1]);

  						pnp_disable_dev(pnp_d);

  						return (0);

  					}
  					break;
  				} else {
  					printk(KERN_ERR "ITK PnP: PnP error card found, no device
  ");
  				}
  			}
  			ipid++;
  			pnp_c = NULL;

  		}

  		if (!ipid->card_vendor) {
  			printk(KERN_INFO "ITK PnP: no ISAPnP card found
  ");

  			return (0);

  		}
  	}
  #endif
  	/* IO-Ports */
  	cs->hw.ix1.isac_ale = card->para[1] + ISAC_COMMAND_OFFSET;
  	cs->hw.ix1.hscx_ale = card->para[1] + HSCX_COMMAND_OFFSET;
  	cs->hw.ix1.isac = card->para[1] + ISAC_DATA_OFFSET;
  	cs->hw.ix1.hscx = card->para[1] + HSCX_DATA_OFFSET;
  	cs->hw.ix1.cfg_reg = card->para[1];
  	cs->irq = card->para[0];
  	if (cs->hw.ix1.cfg_reg) {
  		if (!request_region(cs->hw.ix1.cfg_reg, 4, "ix1micro cfg")) {
  			printk(KERN_WARNING

  			       "HiSax: ITK ix1-micro Rev.2 config port "
  			       "%x-%x already in use
  ",

  			       cs->hw.ix1.cfg_reg,
  			       cs->hw.ix1.cfg_reg + 4);
  			return (0);
  		}
  	}

  	printk(KERN_INFO "HiSax: ITK ix1-micro Rev.2 config irq:%d io:0x%X
  ",

  	       cs->irq, cs->hw.ix1.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 = &ix1_card_msg;
  	cs->irq_func = &ix1micro_interrupt;
  	ISACVersion(cs, "ix1-Micro:");
  	if (HscxVersion(cs, "ix1-Micro:")) {
  		printk(KERN_WARNING

  		       "ix1-Micro: wrong HSCX versions check IO address
  ");

  		release_io_ix1micro(cs);
  		return (0);
  	}
  	return (1);
  }