drivers/isdn/hisax/nj_s.c

   1 /* $Id: nj_s.c,v 2.13.2.4 2004/01/16 01:53:48 keil Exp $
   2  *
   3  * This software may be used and distributed according to the terms
   4  * of the GNU General Public License, incorporated herein by reference.
   5  *
   6  */
   7
   8 #include <linux/config.h>
   9 #include <linux/init.h>
  10 #include "hisax.h"
  11 #include "isac.h"
  12 #include "isdnl1.h"
  13 #include <linux/pci.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/ppp_defs.h>
  16 #include "netjet.h"
  17
  18 const char *NETjet_S_revision = "$Revision: 2.13.2.4 $";
  19
  20 static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off)
  21 {
  22         return(5);
  23 }
  24
  25 static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value)
  26 {
  27 }
  28
  29 static irqreturn_t
  30 netjet_s_interrupt(int intno, void *dev_id, struct pt_regs *regs)
  31 {
  32         struct IsdnCardState *cs = dev_id;
  33         u_char val, s1val, s0val;
  34         u_long flags;
  35
  36         spin_lock_irqsave(&cs->lock, flags);
  37         s1val = bytein(cs->hw.njet.base + NETJET_IRQSTAT1);
  38         if (!(s1val & NETJET_ISACIRQ)) {
  39                 val = NETjet_ReadIC(cs, ISAC_ISTA);
  40                 if (cs->debug & L1_DEB_ISAC)
  41                         debugl1(cs, "tiger: i1 %x %x", s1val, val);
  42                 if (val) {
  43                         isac_interrupt(cs, val);
  44                         NETjet_WriteIC(cs, ISAC_MASK, 0xFF);
  45                         NETjet_WriteIC(cs, ISAC_MASK, 0x0);
  46                 }
  47                 s1val = 1;
  48         } else
  49                 s1val = 0;
  50         /*
  51          * read/write stat0 is better, because lower IRQ rate
  52          * Note the IRQ is on for 125 us if a condition match
  53          * thats long on modern CPU and so the IRQ is reentered
  54          * all the time.
  55          */
  56         s0val = bytein(cs->hw.njet.base + NETJET_IRQSTAT0);
  57         if ((s0val | s1val)==0) { // shared IRQ
  58                 spin_unlock_irqrestore(&cs->lock, flags);
  59                 return IRQ_NONE;
  60         }
  61         if (s0val)
  62                 byteout(cs->hw.njet.base + NETJET_IRQSTAT0, s0val);
  63         /* start new code 13/07/00 GE */
  64         /* set bits in sval to indicate which page is free */
  65         if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
  66                 inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
  67                 /* the 2nd write page is free */
  68                 s0val = 0x08;
  69         else    /* the 1st write page is free */
  70                 s0val = 0x04;
  71         if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
  72                 inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
  73                 /* the 2nd read page is free */
  74                 s0val |= 0x02;
  75         else    /* the 1st read page is free */
  76                 s0val |= 0x01;
  77         if (s0val != cs->hw.njet.last_is0) /* we have a DMA interrupt */
  78         {
  79                 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
  80                         printk(KERN_WARNING "nj LOCK_ATOMIC s0val %x->%x\n",
  81                                 cs->hw.njet.last_is0, s0val);
  82                         spin_unlock_irqrestore(&cs->lock, flags);
  83                         return IRQ_HANDLED;
  84                 }
  85                 cs->hw.njet.irqstat0 = s0val;
  86                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
  87                         (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
  88                         /* we have a read dma int */
  89                         read_tiger(cs);
  90                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
  91                         (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
  92                         /* we have a write dma int */
  93                         write_tiger(cs);
  94                 /* end new code 13/07/00 GE */
  95                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
  96         }
  97         spin_unlock_irqrestore(&cs->lock, flags);
  98         return IRQ_HANDLED;
  99 }
 100
 101 static void
 102 reset_netjet_s(struct IsdnCardState *cs)
 103 {
 104         cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 105         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 106         mdelay(10);
 107         cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
 108         /* now edge triggered for TJ320 GE 13/07/00 */
 109         /* see comment in IRQ function */
 110         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 111         mdelay(10);
 112         cs->hw.njet.auxd = 0;
 113         cs->hw.njet.dmactrl = 0;
 114         byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 115         byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 116         byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 117 }
 118
 119 static int
 120 NETjet_S_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 121 {
 122         u_long flags;
 123
 124         switch (mt) {
 125                 case CARD_RESET:
 126                         spin_lock_irqsave(&cs->lock, flags);
 127                         reset_netjet_s(cs);
 128                         spin_unlock_irqrestore(&cs->lock, flags);
 129                         return(0);
 130                 case CARD_RELEASE:
 131                         release_io_netjet(cs);
 132                         return(0);
 133                 case CARD_INIT:
 134                         reset_netjet_s(cs);
 135                         inittiger(cs);
 136                         spin_lock_irqsave(&cs->lock, flags);
 137                         clear_pending_isac_ints(cs);
 138                         initisac(cs);
 139                         /* Reenable all IRQ */
 140                         cs->writeisac(cs, ISAC_MASK, 0);
 141                         spin_unlock_irqrestore(&cs->lock, flags);
 142                         return(0);
 143                 case CARD_TEST:
 144                         return(0);
 145         }
 146         return(0);
 147 }
 148
 149 static struct pci_dev *dev_netjet __initdata = NULL;
 150
 151 int __init
 152 setup_netjet_s(struct IsdnCard *card)
 153 {
 154         int bytecnt;
 155         struct IsdnCardState *cs = card->cs;
 156         char tmp[64];
 157
 158 #ifdef __BIG_ENDIAN
 159 #error "not running on big endian machines now"
 160 #endif
 161         strcpy(tmp, NETjet_S_revision);
 162         printk(KERN_INFO "HiSax: Traverse Tech. NETjet-S driver Rev. %s\n", HiSax_getrev(tmp));
 163         if (cs->typ != ISDN_CTYPE_NETJET_S)
 164                 return(0);
 165         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 166
 167 #if CONFIG_PCI
 168
 169         for ( ;; )
 170         {
 171                 if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET,
 172                         PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
 173                         if (pci_enable_device(dev_netjet))
 174                                 return(0);
 175                         pci_set_master(dev_netjet);
 176                         cs->irq = dev_netjet->irq;
 177                         if (!cs->irq) {
 178                                 printk(KERN_WARNING "NETjet-S: No IRQ for PCI card found\n");
 179                                 return(0);
 180                         }
 181                         cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
 182                         if (!cs->hw.njet.base) {
 183                                 printk(KERN_WARNING "NETjet-S: No IO-Adr for PCI card found\n");
 184                                 return(0);
 185                         }
 186                         /* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG www.formula-n.com */
 187                         if ((dev_netjet->subsystem_vendor == 0x55) &&
 188                                 (dev_netjet->subsystem_device == 0x02)) {
 189                                 printk(KERN_WARNING "Netjet: You tried to load this driver with an incompatible TigerJet-card\n");
 190                                 printk(KERN_WARNING "Use type=41 for Formula-n enter:now ISDN PCI and compatible\n");
 191                                 return(0);
 192                         }
 193                         /* end new code */
 194                 } else {
 195                         printk(KERN_WARNING "NETjet-S: No PCI card found\n");
 196                         return(0);
 197                 }
 198
 199                 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
 200                 cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
 201
 202                 cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 203                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 204                 mdelay(10);
 205
 206                 cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
 207                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 208                 mdelay(10);
 209
 210                 cs->hw.njet.auxd = 0xC0;
 211                 cs->hw.njet.dmactrl = 0;
 212
 213                 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 214                 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 215                 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 216
 217                 switch ( ( ( NETjet_ReadIC( cs, ISAC_RBCH ) >> 5 ) & 3 ) )
 218                 {
 219                         case 0 :
 220                                 break;
 221
 222                         case 3 :
 223                                 printk( KERN_WARNING "NETjet-S: NETspider-U PCI card found\n" );
 224                                 continue;
 225
 226                         default :
 227                                 printk( KERN_WARNING "NETjet-S: No PCI card found\n" );
 228                                 return 0;
 229                 }
 230                 break;
 231         }
 232 #else
 233
 234         printk(KERN_WARNING "NETjet-S: NO_PCI_BIOS\n");
 235         printk(KERN_WARNING "NETjet-S: unable to config NETJET-S PCI\n");
 236         return (0);
 237
 238 #endif /* CONFIG_PCI */
 239
 240         bytecnt = 256;
 241
 242         printk(KERN_INFO
 243                 "NETjet-S: PCI card configured at %#lx IRQ %d\n",
 244                 cs->hw.njet.base, cs->irq);
 245         if (!request_region(cs->hw.njet.base, bytecnt, "netjet-s isdn")) {
 246                 printk(KERN_WARNING
 247                        "HiSax: %s config port %#lx-%#lx already in use\n",
 248                        CardType[card->typ],
 249                        cs->hw.njet.base,
 250                        cs->hw.njet.base + bytecnt);
 251                 return (0);
 252         }
 253         cs->readisac  = &NETjet_ReadIC;
 254         cs->writeisac = &NETjet_WriteIC;
 255         cs->readisacfifo  = &NETjet_ReadICfifo;
 256         cs->writeisacfifo = &NETjet_WriteICfifo;
 257         cs->BC_Read_Reg  = &dummyrr;
 258         cs->BC_Write_Reg = &dummywr;
 259         cs->BC_Send_Data = &netjet_fill_dma;
 260         setup_isac(cs);
 261         cs->cardmsg = &NETjet_S_card_msg;
 262         cs->irq_func = &netjet_s_interrupt;
 263         cs->irq_flags |= SA_SHIRQ;
 264         ISACVersion(cs, "NETjet-S:");
 265         return (1);
 266 }