text: /* $Id: teles3.c,v 2.19.2.4 2004/01/13 23:48:39 keil Exp $
   *
   * low level stuff for Teles 16.3 & PNP isdn cards
   *
   * 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    Jan den Ouden
   *              Fritz Elfert
   *              Beat Doebeli
   *
   */
  #include <linux/init.h>
  #include <linux/isapnp.h>
  #include "hisax.h"
  #include "isac.h"
  #include "hscx.h"
  #include "isdnl1.h"
  
  static const char *teles3_revision = "$Revision: 2.19.2.4 $";
  
  #define byteout(addr, val) outb(val, addr)
  #define bytein(addr) inb(addr)
  
  static inline u_char
  readreg(unsigned int adr, u_char off)
  {
  	return (bytein(adr + off));
  }
  
  static inline void
  writereg(unsigned int adr, u_char off, u_char data)
  {
  	byteout(adr + off, data);
  }
  
  
  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 (readreg(cs->hw.teles3.isac, offset));
  }
  
  static void
  WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  {
  	writereg(cs->hw.teles3.isac, offset, value);
  }
  
  static void
  ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  {
  	read_fifo(cs->hw.teles3.isacfifo, data, size);
  }
  
  static void
  WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  {
  	write_fifo(cs->hw.teles3.isacfifo, data, size);
  }
  
  static u_char
  ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
  {
  	return (readreg(cs->hw.teles3.hscx[hscx], offset));
  }
  
  static void
  WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
  {
  	writereg(cs->hw.teles3.hscx[hscx], offset, value);
  }
  
  /*
   * fast interrupt HSCX stuff goes here
   */
  
  #define READHSCX(cs, nr, reg) readreg(cs->hw.teles3.hscx[nr], reg)
  #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.teles3.hscx[nr], reg, data)
  #define READHSCXFIFO(cs, nr, ptr, cnt) read_fifo(cs->hw.teles3.hscxfifo[nr], ptr, cnt)
  #define WRITEHSCXFIFO(cs, nr, ptr, cnt) write_fifo(cs->hw.teles3.hscxfifo[nr], ptr, cnt)
  
  #include "hscx_irq.c"
  
  static irqreturn_t
  teles3_interrupt(int intno, void *dev_id)
  {
  #define MAXCOUNT 5
  	struct IsdnCardState *cs = dev_id;
  	u_char val;
  	u_long flags;
  	int count = 0;
  
  	spin_lock_irqsave(&cs->lock, flags);
  	val = readreg(cs->hw.teles3.hscx[1], HSCX_ISTA);
  Start_HSCX:
  	if (val)
  		hscx_int_main(cs, val);
  	val = readreg(cs->hw.teles3.isac, ISAC_ISTA);
  Start_ISAC:
  	if (val)
  		isac_interrupt(cs, val);
  	count++;
  	val = readreg(cs->hw.teles3.hscx[1], HSCX_ISTA);
  	if (val && count < MAXCOUNT) {
  		if (cs->debug & L1_DEB_HSCX)
  			debugl1(cs, "HSCX IntStat after IntRoutine");
  		goto Start_HSCX;
  	}
  	val = readreg(cs->hw.teles3.isac, ISAC_ISTA);
  	if (val && count < MAXCOUNT) {
  		if (cs->debug & L1_DEB_ISAC)
  			debugl1(cs, "ISAC IntStat after IntRoutine");
  		goto Start_ISAC;
  	}
  	if (count >= MAXCOUNT)
  		printk(KERN_WARNING "Teles3: more than %d loops in teles3_interrupt\n", count);
  	writereg(cs->hw.teles3.hscx[0], HSCX_MASK, 0xFF);
  	writereg(cs->hw.teles3.hscx[1], HSCX_MASK, 0xFF);
  	writereg(cs->hw.teles3.isac, ISAC_MASK, 0xFF);
  	writereg(cs->hw.teles3.isac, ISAC_MASK, 0x0);
  	writereg(cs->hw.teles3.hscx[0], HSCX_MASK, 0x0);
  	writereg(cs->hw.teles3.hscx[1], HSCX_MASK, 0x0);
  	spin_unlock_irqrestore(&cs->lock, flags);
  	return IRQ_HANDLED;
  }
  
  static inline void
  release_ioregs(struct IsdnCardState *cs, int mask)
  {
  	if (mask & 1)
  		release_region(cs->hw.teles3.isac + 32, 32);
  	if (mask & 2)
  		release_region(cs->hw.teles3.hscx[0] + 32, 32);
  	if (mask & 4)
  		release_region(cs->hw.teles3.hscx[1] + 32, 32);
  }
  
  static void
  release_io_teles3(struct IsdnCardState *cs)
  {
  	if (cs->typ == ISDN_CTYPE_TELESPCMCIA) {
  		release_region(cs->hw.teles3.hscx[1], 96);
  	} else {
  		if (cs->hw.teles3.cfg_reg) {
  			if (cs->typ == ISDN_CTYPE_COMPAQ_ISA) {
  				release_region(cs->hw.teles3.cfg_reg, 1);
  			} else {
  				release_region(cs->hw.teles3.cfg_reg, 8);
  			}
  		}
  		release_ioregs(cs, 0x7);
  	}
  }
  
  static int
  reset_teles3(struct IsdnCardState *cs)
  {
  	u_char irqcfg;
  
  	if (cs->typ != ISDN_CTYPE_TELESPCMCIA) {
  		if ((cs->hw.teles3.cfg_reg) && (cs->typ != ISDN_CTYPE_COMPAQ_ISA)) {
  			switch (cs->irq) {
  			case 2:
  			case 9:
  				irqcfg = 0x00;
  				break;
  			case 3:
  				irqcfg = 0x02;
  				break;
  			case 4:
  				irqcfg = 0x04;
  				break;
  			case 5:
  				irqcfg = 0x06;
  				break;
  			case 10:
  				irqcfg = 0x08;
  				break;
  			case 11:
  				irqcfg = 0x0A;
  				break;
  			case 12:
  				irqcfg = 0x0C;
  				break;
  			case 15:
  				irqcfg = 0x0E;
  				break;
  			default:
  				return (1);
  			}
  			byteout(cs->hw.teles3.cfg_reg + 4, irqcfg);
  			HZDELAY(HZ / 10 + 1);
  			byteout(cs->hw.teles3.cfg_reg + 4, irqcfg | 1);
  			HZDELAY(HZ / 10 + 1);
  		} else if (cs->typ == ISDN_CTYPE_COMPAQ_ISA) {
  			byteout(cs->hw.teles3.cfg_reg, 0xff);
  			HZDELAY(2);
  			byteout(cs->hw.teles3.cfg_reg, 0x00);
  			HZDELAY(2);
  		} else {
  			/* Reset off for 16.3 PnP , thanks to Georg Acher */
  			byteout(cs->hw.teles3.isac + 0x3c, 0);
  			HZDELAY(2);
  			byteout(cs->hw.teles3.isac + 0x3c, 1);
  			HZDELAY(2);
  		}
  	}
  	return (0);
  }
  
  static int
  Teles_card_msg(struct IsdnCardState *cs, int mt, void *arg)
  {
  	u_long flags;
  
  	switch (mt) {
  	case CARD_RESET:
  		spin_lock_irqsave(&cs->lock, flags);
  		reset_teles3(cs);
  		spin_unlock_irqrestore(&cs->lock, flags);
  		return (0);
  	case CARD_RELEASE:
  		release_io_teles3(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);
  }
  
  #ifdef __ISAPNP__
  
  static struct isapnp_device_id teles_ids[] = {
  	{ ISAPNP_VENDOR('T', 'A', 'G'), ISAPNP_FUNCTION(0x2110),
  	  ISAPNP_VENDOR('T', 'A', 'G'), ISAPNP_FUNCTION(0x2110),
  	  (unsigned long) "Teles 16.3 PnP" },
  	{ ISAPNP_VENDOR('C', 'T', 'X'), ISAPNP_FUNCTION(0x0),
  	  ISAPNP_VENDOR('C', 'T', 'X'), ISAPNP_FUNCTION(0x0),
  	  (unsigned long) "Creatix 16.3 PnP" },
  	{ ISAPNP_VENDOR('C', 'P', 'Q'), ISAPNP_FUNCTION(0x1002),
  	  ISAPNP_VENDOR('C', 'P', 'Q'), ISAPNP_FUNCTION(0x1002),
  	  (unsigned long) "Compaq ISDN S0" },
  	{ 0, }
  };
  
  static struct isapnp_device_id *ipid = &teles_ids[0];
  static struct pnp_card *pnp_c = NULL;
  #endif
  
  int setup_teles3(struct IsdnCard *card)
  {
  	u_char val;
  	struct IsdnCardState *cs = card->cs;
  	char tmp[64];
  
  	strcpy(tmp, teles3_revision);
  	printk(KERN_INFO "HiSax: Teles IO driver Rev. %s\n", HiSax_getrev(tmp));
  	if ((cs->typ != ISDN_CTYPE_16_3) && (cs->typ != ISDN_CTYPE_PNP)
  	    && (cs->typ != ISDN_CTYPE_TELESPCMCIA) && (cs->typ != ISDN_CTYPE_COMPAQ_ISA))
  		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\n",
  					       (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)\n",
  						       __func__, err);
  						return (0);
  					}
  					card->para[3] = pnp_port_start(pnp_d, 2);
  					card->para[2] = pnp_port_start(pnp_d, 1);
  					card->para[1] = pnp_port_start(pnp_d, 0);
  					card->para[0] = pnp_irq(pnp_d, 0);
  					if (card->para[0] == -1 || !card->para[1] || !card->para[2]) {
  						printk(KERN_ERR "Teles PnP:some resources are missing %ld/%lx/%lx\n",
  						       card->para[0], card->para[1], card->para[2]);
  						pnp_disable_dev(pnp_d);
  						return (0);
  					}
  					break;
  				} else {
  					printk(KERN_ERR "Teles PnP: PnP error card found, no device\n");
  				}
  			}
  			ipid++;
  			pnp_c = NULL;
  		}
  		if (!ipid->card_vendor) {
  			printk(KERN_INFO "Teles PnP: no ISAPnP card found\n");
  			return (0);
  		}
  	}
  #endif
  	if (cs->typ == ISDN_CTYPE_16_3) {
  		cs->hw.teles3.cfg_reg = card->para[1];
  		switch (cs->hw.teles3.cfg_reg) {
  		case 0x180:
  		case 0x280:
  		case 0x380:
  			cs->hw.teles3.cfg_reg |= 0xc00;
  			break;
  		}
  		cs->hw.teles3.isac = cs->hw.teles3.cfg_reg - 0x420;
  		cs->hw.teles3.hscx[0] = cs->hw.teles3.cfg_reg - 0xc20;
  		cs->hw.teles3.hscx[1] = cs->hw.teles3.cfg_reg - 0x820;
  	} else if (cs->typ == ISDN_CTYPE_TELESPCMCIA) {
  		cs->hw.teles3.cfg_reg = 0;
  		cs->hw.teles3.hscx[0] = card->para[1] - 0x20;
  		cs->hw.teles3.hscx[1] = card->para[1];
  		cs->hw.teles3.isac = card->para[1] + 0x20;
  	} else if (cs->typ == ISDN_CTYPE_COMPAQ_ISA) {
  		cs->hw.teles3.cfg_reg = card->para[3];
  		cs->hw.teles3.isac = card->para[2] - 32;
  		cs->hw.teles3.hscx[0] = card->para[1] - 32;
  		cs->hw.teles3.hscx[1] = card->para[1];
  	} else {	/* PNP */
  		cs->hw.teles3.cfg_reg = 0;
  		cs->hw.teles3.isac = card->para[1] - 32;
  		cs->hw.teles3.hscx[0] = card->para[2] - 32;
  		cs->hw.teles3.hscx[1] = card->para[2];
  	}
  	cs->irq = card->para[0];
  	cs->hw.teles3.isacfifo = cs->hw.teles3.isac + 0x3e;
  	cs->hw.teles3.hscxfifo[0] = cs->hw.teles3.hscx[0] + 0x3e;
  	cs->hw.teles3.hscxfifo[1] = cs->hw.teles3.hscx[1] + 0x3e;
  	if (cs->typ == ISDN_CTYPE_TELESPCMCIA) {
  		if (!request_region(cs->hw.teles3.hscx[1], 96, "HiSax Teles PCMCIA")) {
  			printk(KERN_WARNING
  			       "HiSax: %s ports %x-%x already in use\n",
  			       CardType[cs->typ],
  			       cs->hw.teles3.hscx[1],
  			       cs->hw.teles3.hscx[1] + 96);
  			return (0);
  		}
  		cs->irq_flags |= IRQF_SHARED; /* cardbus can share */
  	} else {
  		if (cs->hw.teles3.cfg_reg) {
  			if (cs->typ == ISDN_CTYPE_COMPAQ_ISA) {
  				if (!request_region(cs->hw.teles3.cfg_reg, 1, "teles3 cfg")) {
  					printk(KERN_WARNING
  					       "HiSax: %s config port %x already in use\n",
  					       CardType[card->typ],
  					       cs->hw.teles3.cfg_reg);
  					return (0);
  				}
  			} else {
  				if (!request_region(cs->hw.teles3.cfg_reg, 8, "teles3 cfg")) {
  					printk(KERN_WARNING
  					       "HiSax: %s config port %x-%x already in use\n",
  					       CardType[card->typ],
  					       cs->hw.teles3.cfg_reg,
  					       cs->hw.teles3.cfg_reg + 8);
  					return (0);
  				}
  			}
  		}
  		if (!request_region(cs->hw.teles3.isac + 32, 32, "HiSax isac")) {
  			printk(KERN_WARNING
  			       "HiSax: %s isac ports %x-%x already in use\n",
  			       CardType[cs->typ],
  			       cs->hw.teles3.isac + 32,
  			       cs->hw.teles3.isac + 64);
  			if (cs->hw.teles3.cfg_reg) {
  				if (cs->typ == ISDN_CTYPE_COMPAQ_ISA) {
  					release_region(cs->hw.teles3.cfg_reg, 1);
  				} else {
  					release_region(cs->hw.teles3.cfg_reg, 8);
  				}
  			}
  			return (0);
  		}
  		if (!request_region(cs->hw.teles3.hscx[0] + 32, 32, "HiSax hscx A")) {
  			printk(KERN_WARNING
  			       "HiSax: %s hscx A ports %x-%x already in use\n",
  			       CardType[cs->typ],
  			       cs->hw.teles3.hscx[0] + 32,
  			       cs->hw.teles3.hscx[0] + 64);
  			if (cs->hw.teles3.cfg_reg) {
  				if (cs->typ == ISDN_CTYPE_COMPAQ_ISA) {
  					release_region(cs->hw.teles3.cfg_reg, 1);
  				} else {
  					release_region(cs->hw.teles3.cfg_reg, 8);
  				}
  			}
  			release_ioregs(cs, 1);
  			return (0);
  		}
  		if (!request_region(cs->hw.teles3.hscx[1] + 32, 32, "HiSax hscx B")) {
  			printk(KERN_WARNING
  			       "HiSax: %s hscx B ports %x-%x already in use\n",
  			       CardType[cs->typ],
  			       cs->hw.teles3.hscx[1] + 32,
  			       cs->hw.teles3.hscx[1] + 64);
  			if (cs->hw.teles3.cfg_reg) {
  				if (cs->typ == ISDN_CTYPE_COMPAQ_ISA) {
  					release_region(cs->hw.teles3.cfg_reg, 1);
  				} else {
  					release_region(cs->hw.teles3.cfg_reg, 8);
  				}
  			}
  			release_ioregs(cs, 3);
  			return (0);
  		}
  	}
  	if ((cs->hw.teles3.cfg_reg) && (cs->typ != ISDN_CTYPE_COMPAQ_ISA)) {
  		if ((val = bytein(cs->hw.teles3.cfg_reg + 0)) != 0x51) {
  			printk(KERN_WARNING "Teles: 16.3 Byte at %x is %x\n",
  			       cs->hw.teles3.cfg_reg + 0, val);
  			release_io_teles3(cs);
  			return (0);
  		}
  		if ((val = bytein(cs->hw.teles3.cfg_reg + 1)) != 0x93) {
  			printk(KERN_WARNING "Teles: 16.3 Byte at %x is %x\n",
  			       cs->hw.teles3.cfg_reg + 1, val);
  			release_io_teles3(cs);
  			return (0);
  		}
  		val = bytein(cs->hw.teles3.cfg_reg + 2);/* 0x1e=without AB
  							 * 0x1f=with AB
  							 * 0x1c 16.3 ???
  							 * 0x39 16.3 1.1
  							 * 0x38 16.3 1.3
  							 * 0x46 16.3 with AB + Video (Teles-Vision)
  							 */
  		if (val != 0x46 && val != 0x39 && val != 0x38 && val != 0x1c && val != 0x1e && val != 0x1f) {
  			printk(KERN_WARNING "Teles: 16.3 Byte at %x is %x\n",
  			       cs->hw.teles3.cfg_reg + 2, val);
  			release_io_teles3(cs);
  			return (0);
  		}
  	}
  	printk(KERN_INFO
  	       "HiSax: %s config irq:%d isac:0x%X  cfg:0x%X\n",
  	       CardType[cs->typ], cs->irq,
  	       cs->hw.teles3.isac + 32, cs->hw.teles3.cfg_reg);
  	printk(KERN_INFO
  	       "HiSax: hscx A:0x%X  hscx B:0x%X\n",
  	       cs->hw.teles3.hscx[0] + 32, cs->hw.teles3.hscx[1] + 32);
  
  	setup_isac(cs);
  	if (reset_teles3(cs)) {
  		printk(KERN_WARNING "Teles3: wrong IRQ\n");
  		release_io_teles3(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 = &Teles_card_msg;
  	cs->irq_func = &teles3_interrupt;
  	ISACVersion(cs, "Teles3:");
  	if (HscxVersion(cs, "Teles3:")) {
  		printk(KERN_WARNING
  		       "Teles3: wrong HSCX versions check IO address\n");
  		release_io_teles3(cs);
  		return (0);
  	}
  	return (1);
  }
  