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/init.h>
   9 #include "hisax.h"
  10 #include "isac.h"
  11 #include "isdnl1.h"
  12 #include <linux/pci.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/ppp_defs.h>
  15 #include "netjet.h"
  16
  17 static const char *NETjet_S_revision = "$Revision: 2.13.2.4 $";
  18
  19 static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off)
  20 {
  21         return(5);
  22 }
  23
  24 static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value)
  25 {
  26 }
  27
  28 static irqreturn_t
  29 netjet_s_interrupt(int intno, void *dev_id, struct pt_regs *regs)
  30 {
  31         struct IsdnCardState *cs = dev_id;
  32         u_char val, s1val, s0val;
  33         u_long flags;
  34
  35         spin_lock_irqsave(&cs->lock, flags);
  36         s1val = bytein(cs->hw.njet.base + NETJET_IRQSTAT1);
  37         if (!(s1val & NETJET_ISACIRQ)) {
  38                 val = NETjet_ReadIC(cs, ISAC_ISTA);
  39                 if (cs->debug & L1_DEB_ISAC)
  40                         debugl1(cs, "tiger: i1 %x %x", s1val, val);
  41                 if (val) {
  42                         isac_interrupt(cs, val);
  43                         NETjet_WriteIC(cs, ISAC_MASK, 0xFF);
  44                         NETjet_WriteIC(cs, ISAC_MASK, 0x0);
  45                 }
  46                 s1val = 1;
  47         } else
  48                 s1val = 0;
  49         /*
  50          * read/write stat0 is better, because lower IRQ rate
  51          * Note the IRQ is on for 125 us if a condition match
  52          * thats long on modern CPU and so the IRQ is reentered
  53          * all the time.
  54          */
  55         s0val = bytein(cs->hw.njet.base + NETJET_IRQSTAT0);
  56         if ((s0val | s1val)==0) { // shared IRQ
  57                 spin_unlock_irqrestore(&cs->lock, flags);
  58                 return IRQ_NONE;
  59         }
  60         if (s0val)
  61                 byteout(cs->hw.njet.base + NETJET_IRQSTAT0, s0val);
  62         /* start new code 13/07/00 GE */
  63         /* set bits in sval to indicate which page is free */
  64         if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
  65                 inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
  66                 /* the 2nd write page is free */
  67                 s0val = 0x08;
  68         else    /* the 1st write page is free */
  69                 s0val = 0x04;
  70         if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
  71                 inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
  72                 /* the 2nd read page is free */
  73                 s0val |= 0x02;
  74         else    /* the 1st read page is free */
  75                 s0val |= 0x01;
  76         if (s0val != cs->hw.njet.last_is0) /* we have a DMA interrupt */
  77         {
  78                 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
  79                         printk(KERN_WARNING "nj LOCK_ATOMIC s0val %x->%x\n",
  80                                 cs->hw.njet.last_is0, s0val);
  81                         spin_unlock_irqrestore(&cs->lock, flags);
  82                         return IRQ_HANDLED;
  83                 }
  84                 cs->hw.njet.irqstat0 = s0val;
  85                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
  86                         (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
  87                         /* we have a read dma int */
  88                         read_tiger(cs);
  89                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
  90                         (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
  91                         /* we have a write dma int */
  92                         write_tiger(cs);
  93                 /* end new code 13/07/00 GE */
  94                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
  95         }
  96         spin_unlock_irqrestore(&cs->lock, flags);
  97         return IRQ_HANDLED;
  98 }
  99
 100 static void
 101 reset_netjet_s(struct IsdnCardState *cs)
 102 {
 103         cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 104         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 105         mdelay(10);
 106         /* now edge triggered for TJ320 GE 13/07/00 */
 107         /* see comment in IRQ function */
 108         if (cs->subtyp) /* TJ320 */
 109                 cs->hw.njet.ctrl_reg = 0x40;  /* Reset Off and status read clear */
 110         else
 111                 cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
 112         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 113         mdelay(10);
 114         cs->hw.njet.auxd = 0;
 115         cs->hw.njet.dmactrl = 0;
 116         byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 117         byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 118         byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 119 }
 120
 121 static int
 122 NETjet_S_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 123 {
 124         u_long flags;
 125
 126         switch (mt) {
 127                 case CARD_RESET:
 128                         spin_lock_irqsave(&cs->lock, flags);
 129                         reset_netjet_s(cs);
 130                         spin_unlock_irqrestore(&cs->lock, flags);
 131                         return(0);
 132                 case CARD_RELEASE:
 133                         release_io_netjet(cs);
 134                         return(0);
 135                 case CARD_INIT:
 136                         reset_netjet_s(cs);
 137                         inittiger(cs);
 138                         spin_lock_irqsave(&cs->lock, flags);
 139                         clear_pending_isac_ints(cs);
 140                         initisac(cs);
 141                         /* Reenable all IRQ */
 142                         cs->writeisac(cs, ISAC_MASK, 0);
 143                         spin_unlock_irqrestore(&cs->lock, flags);
 144                         return(0);
 145                 case CARD_TEST:
 146                         return(0);
 147         }
 148         return(0);
 149 }
 150
 151 static struct pci_dev *dev_netjet __initdata = NULL;
 152
 153 int __init
 154 setup_netjet_s(struct IsdnCard *card)
 155 {
 156         int bytecnt,cfg;
 157         struct IsdnCardState *cs = card->cs;
 158         char tmp[64];
 159
 160 #ifdef __BIG_ENDIAN
 161 #error "not running on big endian machines now"
 162 #endif
 163         strcpy(tmp, NETjet_S_revision);
 164         printk(KERN_INFO "HiSax: Traverse Tech. NETjet-S driver Rev. %s\n", HiSax_getrev(tmp));
 165         if (cs->typ != ISDN_CTYPE_NETJET_S)
 166                 return(0);
 167         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 168
 169 #ifdef CONFIG_PCI
 170
 171         for ( ;; )
 172         {
 173                 if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET,
 174                         PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
 175                         if (pci_enable_device(dev_netjet))
 176                                 return(0);
 177                         pci_set_master(dev_netjet);
 178                         cs->irq = dev_netjet->irq;
 179                         if (!cs->irq) {
 180                                 printk(KERN_WARNING "NETjet-S: No IRQ for PCI card found\n");
 181                                 return(0);
 182                         }
 183                         cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
 184                         if (!cs->hw.njet.base) {
 185                                 printk(KERN_WARNING "NETjet-S: No IO-Adr for PCI card found\n");
 186                                 return(0);
 187                         }
 188                         /* the TJ300 and TJ320 must be detected, the IRQ handling is different
 189                          * unfortunatly the chips use the same device ID, but the TJ320 has
 190                          * the bit20 in status PCI cfg register set
 191                          */
 192                         pci_read_config_dword(dev_netjet, 0x04, &cfg);
 193                         if (cfg & 0x00100000)
 194                                 cs->subtyp = 1; /* TJ320 */
 195                         else
 196                                 cs->subtyp = 0; /* TJ300 */
 197                         /* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG www.formula-n.com */
 198                         if ((dev_netjet->subsystem_vendor == 0x55) &&
 199                                 (dev_netjet->subsystem_device == 0x02)) {
 200                                 printk(KERN_WARNING "Netjet: You tried to load this driver with an incompatible TigerJet-card\n");
 201                                 printk(KERN_WARNING "Use type=41 for Formula-n enter:now ISDN PCI and compatible\n");
 202                                 return(0);
 203                         }
 204                         /* end new code */
 205                 } else {
 206                         printk(KERN_WARNING "NETjet-S: No PCI card found\n");
 207                         return(0);
 208                 }
 209
 210                 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
 211                 cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
 212
 213                 cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 214                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 215                 mdelay(10);
 216
 217                 cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
 218                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 219                 mdelay(10);
 220
 221                 cs->hw.njet.auxd = 0xC0;
 222                 cs->hw.njet.dmactrl = 0;
 223
 224                 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 225                 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 226                 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 227
 228                 switch ( ( ( NETjet_ReadIC( cs, ISAC_RBCH ) >> 5 ) & 3 ) )
 229                 {
 230                         case 0 :
 231                                 break;
 232
 233                         case 3 :
 234                                 printk( KERN_WARNING "NETjet-S: NETspider-U PCI card found\n" );
 235                                 continue;
 236
 237                         default :
 238                                 printk( KERN_WARNING "NETjet-S: No PCI card found\n" );
 239                                 return 0;
 240                 }
 241                 break;
 242         }
 243 #else
 244
 245         printk(KERN_WARNING "NETjet-S: NO_PCI_BIOS\n");
 246         printk(KERN_WARNING "NETjet-S: unable to config NETJET-S PCI\n");
 247         return (0);
 248
 249 #endif /* CONFIG_PCI */
 250
 251         bytecnt = 256;
 252
 253         printk(KERN_INFO
 254                 "NETjet-S: %s card configured at %#lx IRQ %d\n",
 255                 cs->subtyp ? "TJ320" : "TJ300", cs->hw.njet.base, cs->irq);
 256         if (!request_region(cs->hw.njet.base, bytecnt, "netjet-s isdn")) {
 257                 printk(KERN_WARNING
 258                        "HiSax: %s config port %#lx-%#lx already in use\n",
 259                        CardType[card->typ],
 260                        cs->hw.njet.base,
 261                        cs->hw.njet.base + bytecnt);
 262                 return (0);
 263         }
 264         cs->readisac  = &NETjet_ReadIC;
 265         cs->writeisac = &NETjet_WriteIC;
 266         cs->readisacfifo  = &NETjet_ReadICfifo;
 267         cs->writeisacfifo = &NETjet_WriteICfifo;
 268         cs->BC_Read_Reg  = &dummyrr;
 269         cs->BC_Write_Reg = &dummywr;
 270         cs->BC_Send_Data = &netjet_fill_dma;
 271         setup_isac(cs);
 272         cs->cardmsg = &NETjet_S_card_msg;
 273         cs->irq_func = &netjet_s_interrupt;
 274         cs->irq_flags |= IRQF_SHARED;
 275         ISACVersion(cs, "NETjet-S:");
 276         return (1);
 277 }