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telespci.c

/* $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>

extern const char *CardType[];
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 __devinitdata = NULL;

int __devinit
setup_telespci(struct IsdnCard *card)
{
      struct IsdnCardState *cs = card->cs;
      char tmp[64];

#ifdef __BIG_ENDIAN
#error "not running on big endian machines now"
#endif

      strcpy(tmp, telespci_revision);
      printk(KERN_INFO "HiSax: Teles/PCI driver Rev. %s\n", HiSax_getrev(tmp));
      if (cs->typ != ISDN_CTYPE_TELESPCI)
            return (0);

      if ((dev_tel = pci_find_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\n");
                  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\n",
                  (unsigned long long)pci_resource_start(dev_tel, 0),
                  dev_tel->irq);
      } else {
            printk(KERN_WARNING "TelesPCI: No PCI card found\n");
            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: %s config irq:%d mem:%p\n",
             CardType[cs->typ], 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\n");
            release_io_telespci(cs);
            return (0);
      }
      return (1);
}

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