/* $Id: telespci.c,v 2.23.2.3 2004/01/13 14:31:26 keil Exp $
   *
   * low level stuff for Teles PCI isdn cards
   *
   * Author       Ton van Rosmalen
   *              Karsten Keil
   * Copyright    by Ton van Rosmalen
   *              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.
   *
   */
  
  #include <linux/init.h>
  #include "hisax.h"
  #include "isac.h"
  #include "hscx.h"
  #include "isdnl1.h"
  #include <linux/pci.h>
  
  static const char *telespci_revision = "$Revision: 2.23.2.3 $";
  
  #define ZORAN_PO_RQ_PEN	0x02000000
  #define ZORAN_PO_WR	0x00800000
  #define ZORAN_PO_GID0	0x00000000
  #define ZORAN_PO_GID1	0x00100000
  #define ZORAN_PO_GREG0	0x00000000
  #define ZORAN_PO_GREG1	0x00010000
  #define ZORAN_PO_DMASK	0xFF
  
  #define WRITE_ADDR_ISAC	(ZORAN_PO_WR | ZORAN_PO_GID0 | ZORAN_PO_GREG0)
  #define READ_DATA_ISAC	(ZORAN_PO_GID0 | ZORAN_PO_GREG1)
  #define WRITE_DATA_ISAC	(ZORAN_PO_WR | ZORAN_PO_GID0 | ZORAN_PO_GREG1)
  #define WRITE_ADDR_HSCX	(ZORAN_PO_WR | ZORAN_PO_GID1 | ZORAN_PO_GREG0)
  #define READ_DATA_HSCX	(ZORAN_PO_GID1 | ZORAN_PO_GREG1)
  #define WRITE_DATA_HSCX	(ZORAN_PO_WR | ZORAN_PO_GID1 | ZORAN_PO_GREG1)
  
  #define ZORAN_WAIT_NOBUSY	do {		\
  		portdata = readl(adr + 0x200);	\
  	} while (portdata & ZORAN_PO_RQ_PEN)
  
  static inline u_char
  readisac(void __iomem *adr, u_char off)
  {
  	register unsigned int portdata;
  
  	ZORAN_WAIT_NOBUSY;
  
  	/* set address for ISAC */
  	writel(WRITE_ADDR_ISAC | off, adr + 0x200);
  	ZORAN_WAIT_NOBUSY;
  
  	/* read data from ISAC */
  	writel(READ_DATA_ISAC, adr + 0x200);
  	ZORAN_WAIT_NOBUSY;
  	return ((u_char)(portdata & ZORAN_PO_DMASK));
  }
  
  static inline void
  writeisac(void __iomem *adr, u_char off, u_char data)
  {
  	register unsigned int portdata;
  
  	ZORAN_WAIT_NOBUSY;
  
  	/* set address for ISAC */
  	writel(WRITE_ADDR_ISAC | off, adr + 0x200);
  	ZORAN_WAIT_NOBUSY;
  
  	/* write data to ISAC */
  	writel(WRITE_DATA_ISAC | data, adr + 0x200);
  	ZORAN_WAIT_NOBUSY;
  }
  
  static inline u_char
  readhscx(void __iomem *adr, int hscx, u_char off)
  {
  	register unsigned int portdata;
  
  	ZORAN_WAIT_NOBUSY;
  	/* set address for HSCX */
  	writel(WRITE_ADDR_HSCX | ((hscx ? 0x40 : 0) + off), adr + 0x200);
  	ZORAN_WAIT_NOBUSY;
  
  	/* read data from HSCX */
  	writel(READ_DATA_HSCX, adr + 0x200);
  	ZORAN_WAIT_NOBUSY;
  	return ((u_char)(portdata & ZORAN_PO_DMASK));
  }
  
  static inline void
  writehscx(void __iomem *adr, int hscx, u_char off, u_char data)
  {
  	register unsigned int portdata;
  
  	ZORAN_WAIT_NOBUSY;
  	/* set address for HSCX */
  	writel(WRITE_ADDR_HSCX | ((hscx ? 0x40 : 0) + off), adr + 0x200);
  	ZORAN_WAIT_NOBUSY;
  
  	/* write data to HSCX */
  	writel(WRITE_DATA_HSCX | data, adr + 0x200);
  	ZORAN_WAIT_NOBUSY;
  }
  
  static inline void
  read_fifo_isac(void __iomem *adr, u_char *data, int size)
  {
  	register unsigned int portdata;
  	register int i;
  
  	ZORAN_WAIT_NOBUSY;
  	/* read data from ISAC */
  	for (i = 0; i < size; i++) {
  		/* set address for ISAC fifo */
  		writel(WRITE_ADDR_ISAC | 0x1E, adr + 0x200);
  		ZORAN_WAIT_NOBUSY;
  		writel(READ_DATA_ISAC, adr + 0x200);
  		ZORAN_WAIT_NOBUSY;
  		data[i] = (u_char)(portdata & ZORAN_PO_DMASK);
  	}
  }
  
  static void
  write_fifo_isac(void __iomem *adr, u_char *data, int size)
  {
  	register unsigned int portdata;
  	register int i;
  
  	ZORAN_WAIT_NOBUSY;
  	/* write data to ISAC */
  	for (i = 0; i < size; i++) {
  		/* set address for ISAC fifo */
  		writel(WRITE_ADDR_ISAC | 0x1E, adr + 0x200);
  		ZORAN_WAIT_NOBUSY;
  		writel(WRITE_DATA_ISAC | data[i], adr + 0x200);
  		ZORAN_WAIT_NOBUSY;
  	}
  }
  
  static inline void
  read_fifo_hscx(void __iomem *adr, int hscx, u_char *data, int size)
  {
  	register unsigned int portdata;
  	register int i;
  
  	ZORAN_WAIT_NOBUSY;
  	/* read data from HSCX */
  	for (i = 0; i < size; i++) {
  		/* set address for HSCX fifo */
  		writel(WRITE_ADDR_HSCX | (hscx ? 0x5F : 0x1F), adr + 0x200);
  		ZORAN_WAIT_NOBUSY;
  		writel(READ_DATA_HSCX, adr + 0x200);
  		ZORAN_WAIT_NOBUSY;
  		data[i] = (u_char) (portdata & ZORAN_PO_DMASK);
  	}
  }
  
  static inline void
  write_fifo_hscx(void __iomem *adr, int hscx, u_char *data, int size)
  {
  	unsigned int portdata;
  	register int i;
  
  	ZORAN_WAIT_NOBUSY;
  	/* write data to HSCX */
  	for (i = 0; i < size; i++) {
  		/* set address for HSCX fifo */
  		writel(WRITE_ADDR_HSCX | (hscx ? 0x5F : 0x1F), adr + 0x200);
  		ZORAN_WAIT_NOBUSY;
  		writel(WRITE_DATA_HSCX | data[i], adr + 0x200);
  		ZORAN_WAIT_NOBUSY;
  		udelay(10);
  	}
  }
  
  /* Interface functions */
  
  static u_char
  ReadISAC(struct IsdnCardState *cs, u_char offset)
  {
  	return (readisac(cs->hw.teles0.membase, offset));
  }
  
  static void
  WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  {
  	writeisac(cs->hw.teles0.membase, offset, value);
  }
  
  static void
  ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  {
  	read_fifo_isac(cs->hw.teles0.membase, data, size);
  }
  
  static void
  WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  {
  	write_fifo_isac(cs->hw.teles0.membase, data, size);
  }
  
  static u_char
  ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
  {
  	return (readhscx(cs->hw.teles0.membase, hscx, offset));
  }
  
  static void
  WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
  {
  	writehscx(cs->hw.teles0.membase, hscx, offset, value);
  }
  
  /*
   * fast interrupt HSCX stuff goes here
   */
  
  #define READHSCX(cs, nr, reg) readhscx(cs->hw.teles0.membase, nr, reg)
  #define WRITEHSCX(cs, nr, reg, data) writehscx(cs->hw.teles0.membase, nr, reg, data)
  #define READHSCXFIFO(cs, nr, ptr, cnt) read_fifo_hscx(cs->hw.teles0.membase, nr, ptr, cnt)
  #define WRITEHSCXFIFO(cs, nr, ptr, cnt) write_fifo_hscx(cs->hw.teles0.membase, nr, ptr, cnt)
  
  #include "hscx_irq.c"
  
  static irqreturn_t
  telespci_interrupt(int intno, void *dev_id)
  {
  	struct IsdnCardState *cs = dev_id;
  	u_char hval, ival;
  	u_long flags;
  
  	spin_lock_irqsave(&cs->lock, flags);
  	hval = readhscx(cs->hw.teles0.membase, 1, HSCX_ISTA);
  	if (hval)
  		hscx_int_main(cs, hval);
  	ival = readisac(cs->hw.teles0.membase, ISAC_ISTA);
  	if ((hval | ival) == 0) {
  		spin_unlock_irqrestore(&cs->lock, flags);
  		return IRQ_NONE;
  	}
  	if (ival)
  		isac_interrupt(cs, ival);
  	/* Clear interrupt register for Zoran PCI controller */
  	writel(0x70000000, cs->hw.teles0.membase + 0x3C);
  
  	writehscx(cs->hw.teles0.membase, 0, HSCX_MASK, 0xFF);
  	writehscx(cs->hw.teles0.membase, 1, HSCX_MASK, 0xFF);
  	writeisac(cs->hw.teles0.membase, ISAC_MASK, 0xFF);
  	writeisac(cs->hw.teles0.membase, ISAC_MASK, 0x0);
  	writehscx(cs->hw.teles0.membase, 0, HSCX_MASK, 0x0);
  	writehscx(cs->hw.teles0.membase, 1, HSCX_MASK, 0x0);
  	spin_unlock_irqrestore(&cs->lock, flags);
  	return IRQ_HANDLED;
  }
  
  static void
  release_io_telespci(struct IsdnCardState *cs)
  {
  	iounmap(cs->hw.teles0.membase);
  }
  
  static int
  TelesPCI_card_msg(struct IsdnCardState *cs, int mt, void *arg)
  {
  	u_long flags;
  
  	switch (mt) {
  	case CARD_RESET:
  		return (0);
  	case CARD_RELEASE:
  		release_io_telespci(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);
  }
  
  static struct pci_dev *dev_tel = NULL;
  
  int setup_telespci(struct IsdnCard *card)
  {
  	struct IsdnCardState *cs = card->cs;
  	char tmp[64];
  
  	strcpy(tmp, telespci_revision);
  	printk(KERN_INFO "HiSax: Teles/PCI driver Rev. %s
  ", HiSax_getrev(tmp));
  	if (cs->typ != ISDN_CTYPE_TELESPCI)
  		return (0);
  
  	if ((dev_tel = hisax_find_pci_device(PCI_VENDOR_ID_ZORAN, PCI_DEVICE_ID_ZORAN_36120, dev_tel))) {
  		if (pci_enable_device(dev_tel))
  			return (0);
  		cs->irq = dev_tel->irq;
  		if (!cs->irq) {
  			printk(KERN_WARNING "Teles: No IRQ for PCI card found
  ");
  			return (0);
  		}
  		cs->hw.teles0.membase = ioremap(pci_resource_start(dev_tel, 0),
  						PAGE_SIZE);
  		printk(KERN_INFO "Found: Zoran, base-address: 0x%llx, irq: 0x%x
  ",
  		       (unsigned long long)pci_resource_start(dev_tel, 0),
  		       dev_tel->irq);
  	} else {
  		printk(KERN_WARNING "TelesPCI: No PCI card found
  ");
  		return (0);
  	}
  
  	/* Initialize Zoran PCI controller */
  	writel(0x00000000, cs->hw.teles0.membase + 0x28);
  	writel(0x01000000, cs->hw.teles0.membase + 0x28);
  	writel(0x01000000, cs->hw.teles0.membase + 0x28);
  	writel(0x7BFFFFFF, cs->hw.teles0.membase + 0x2C);
  	writel(0x70000000, cs->hw.teles0.membase + 0x3C);
  	writel(0x61000000, cs->hw.teles0.membase + 0x40);
  	/* writel(0x00800000, cs->hw.teles0.membase + 0x200); */
  
  	printk(KERN_INFO
  	       "HiSax: Teles PCI config irq:%d mem:%p
  ",
  	       cs->irq,
  	       cs->hw.teles0.membase);
  
  	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 = &TelesPCI_card_msg;
  	cs->irq_func = &telespci_interrupt;
  	cs->irq_flags |= IRQF_SHARED;
  	ISACVersion(cs, "TelesPCI:");
  	if (HscxVersion(cs, "TelesPCI:")) {
  		printk(KERN_WARNING
  		       "TelesPCI: wrong HSCX versions check IO/MEM addresses
  ");
  		release_io_telespci(cs);
  		return (0);
  	}
  	return (1);
  }