/* $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\n", 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\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[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\n",
						       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\n");
				}
			}
			ipid++;
			pnp_c = NULL;
		}
		if (!ipid->card_vendor) {
			printk(KERN_INFO "ITK PnP: no ISAPnP card found\n");
			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\n",
			       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\n",
	       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\n");
		release_io_ix1micro(cs);
		return (0);
	}
	return (1);
}