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 static 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         /* now edge triggered for TJ320 GE 13/07/00 */
 108         /* see comment in IRQ function */
 109         if (cs->subtyp) /* TJ320 */
 110                 cs->hw.njet.ctrl_reg = 0x40;  /* Reset Off and status read clear */
 111         else
 112                 cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
 113         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 114         mdelay(10);
 115         cs->hw.njet.auxd = 0;
 116         cs->hw.njet.dmactrl = 0;
 117         byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 118         byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 119         byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 120 }
 121
 122 static int
 123 NETjet_S_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 124 {
 125         u_long flags;
 126
 127         switch (mt) {
 128                 case CARD_RESET:
 129                         spin_lock_irqsave(&cs->lock, flags);
 130                         reset_netjet_s(cs);
 131                         spin_unlock_irqrestore(&cs->lock, flags);
 132                         return(0);
 133                 case CARD_RELEASE:
 134                         release_io_netjet(cs);
 135                         return(0);
 136                 case CARD_INIT:
 137                         reset_netjet_s(cs);
 138                         inittiger(cs);
 139                         spin_lock_irqsave(&cs->lock, flags);
 140                         clear_pending_isac_ints(cs);
 141                         initisac(cs);
 142                         /* Reenable all IRQ */
 143                         cs->writeisac(cs, ISAC_MASK, 0);
 144                         spin_unlock_irqrestore(&cs->lock, flags);
 145                         return(0);
 146                 case CARD_TEST:
 147                         return(0);
 148         }
 149         return(0);
 150 }
 151
 152 static struct pci_dev *dev_netjet __initdata = NULL;
 153
 154 int __init
 155 setup_netjet_s(struct IsdnCard *card)
 156 {
 157         int bytecnt,cfg;
 158         struct IsdnCardState *cs = card->cs;
 159         char tmp[64];
 160
 161 #ifdef __BIG_ENDIAN
 162 #error "not running on big endian machines now"
 163 #endif
 164         strcpy(tmp, NETjet_S_revision);
 165         printk(KERN_INFO "HiSax: Traverse Tech. NETjet-S driver Rev. %s\n", HiSax_getrev(tmp));
 166         if (cs->typ != ISDN_CTYPE_NETJET_S)
 167                 return(0);
 168         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 169
 170 #ifdef CONFIG_PCI
 171
 172         for ( ;; )
 173         {
 174                 if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET,
 175                         PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
 176                         if (pci_enable_device(dev_netjet))
 177                                 return(0);
 178                         pci_set_master(dev_netjet);
 179                         cs->irq = dev_netjet->irq;
 180                         if (!cs->irq) {
 181                                 printk(KERN_WARNING "NETjet-S: No IRQ for PCI card found\n");
 182                                 return(0);
 183                         }
 184                         cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
 185                         if (!cs->hw.njet.base) {
 186                                 printk(KERN_WARNING "NETjet-S: No IO-Adr for PCI card found\n");
 187                                 return(0);
 188                         }
 189                         /* the TJ300 and TJ320 must be detected, the IRQ handling is different
 190                          * unfortunatly the chips use the same device ID, but the TJ320 has
 191                          * the bit20 in status PCI cfg register set
 192                          */
 193                         pci_read_config_dword(dev_netjet, 0x04, &cfg);
 194                         if (cfg & 0x00100000)
 195                                 cs->subtyp = 1; /* TJ320 */
 196                         else
 197                                 cs->subtyp = 0; /* TJ300 */
 198                         /* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG www.formula-n.com */
 199                         if ((dev_netjet->subsystem_vendor == 0x55) &&
 200                                 (dev_netjet->subsystem_device == 0x02)) {
 201                                 printk(KERN_WARNING "Netjet: You tried to load this driver with an incompatible TigerJet-card\n");
 202                                 printk(KERN_WARNING "Use type=41 for Formula-n enter:now ISDN PCI and compatible\n");
 203                                 return(0);
 204                         }
 205                         /* end new code */
 206                 } else {
 207                         printk(KERN_WARNING "NETjet-S: No PCI card found\n");
 208                         return(0);
 209                 }
 210
 211                 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
 212                 cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
 213
 214                 cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 215                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 216                 mdelay(10);
 217
 218                 cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
 219                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 220                 mdelay(10);
 221
 222                 cs->hw.njet.auxd = 0xC0;
 223                 cs->hw.njet.dmactrl = 0;
 224
 225                 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 226                 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 227                 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 228
 229                 switch ( ( ( NETjet_ReadIC( cs, ISAC_RBCH ) >> 5 ) & 3 ) )
 230                 {
 231                         case 0 :
 232                                 break;
 233
 234                         case 3 :
 235                                 printk( KERN_WARNING "NETjet-S: NETspider-U PCI card found\n" );
 236                                 continue;
 237
 238                         default :
 239                                 printk( KERN_WARNING "NETjet-S: No PCI card found\n" );
 240                                 return 0;
 241                 }
 242                 break;
 243         }
 244 #else
 245
 246         printk(KERN_WARNING "NETjet-S: NO_PCI_BIOS\n");
 247         printk(KERN_WARNING "NETjet-S: unable to config NETJET-S PCI\n");
 248         return (0);
 249
 250 #endif /* CONFIG_PCI */
 251
 252         bytecnt = 256;
 253
 254         printk(KERN_INFO
 255                 "NETjet-S: %s card configured at %#lx IRQ %d\n",
 256                 cs->subtyp ? "TJ320" : "TJ300", cs->hw.njet.base, cs->irq);
 257         if (!request_region(cs->hw.njet.base, bytecnt, "netjet-s isdn")) {
 258                 printk(KERN_WARNING
 259                        "HiSax: %s config port %#lx-%#lx already in use\n",
 260                        CardType[card->typ],
 261                        cs->hw.njet.base,
 262                        cs->hw.njet.base + bytecnt);
 263                 return (0);
 264         }
 265         cs->readisac  = &NETjet_ReadIC;
 266         cs->writeisac = &NETjet_WriteIC;
 267         cs->readisacfifo  = &NETjet_ReadICfifo;
 268         cs->writeisacfifo = &NETjet_WriteICfifo;
 269         cs->BC_Read_Reg  = &dummyrr;
 270         cs->BC_Write_Reg = &dummywr;
 271         cs->BC_Send_Data = &netjet_fill_dma;
 272         setup_isac(cs);
 273         cs->cardmsg = &NETjet_S_card_msg;
 274         cs->irq_func = &netjet_s_interrupt;
 275         cs->irq_flags |= SA_SHIRQ;
 276         ISACVersion(cs, "NETjet-S:");
 277         return (1);
 278 }