drivers/isdn/hisax/nj_u.c

   1 /* $Id: nj_u.c,v 2.8.6.1 2000/11/29 16:00:14 kai Exp $
   2  *
   3  * This file is (c) under GNU PUBLIC LICENSE
   4  *
   5  */
   6
   7 #define __NO_VERSION__
   8 #include <linux/config.h>
   9 #include <linux/init.h>
  10 #include "hisax.h"
  11 #include "icc.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_U_revision = "$Revision: 2.8.6.1 $";
  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 void
  30 netjet_u_interrupt(int intno, void *dev_id, struct pt_regs *regs)
  31 {
  32         struct IsdnCardState *cs = dev_id;
  33         u_char val, sval;
  34         long flags;
  35
  36         if (!cs) {
  37                 printk(KERN_WARNING "NETspider-U: Spurious interrupt!\n");
  38                 return;
  39         }
  40         if (!((sval = bytein(cs->hw.njet.base + NETJET_IRQSTAT1)) &
  41                 NETJET_ISACIRQ)) {
  42                 val = NETjet_ReadIC(cs, ICC_ISTA);
  43                 if (cs->debug & L1_DEB_ISAC)
  44                         debugl1(cs, "tiger: i1 %x %x", sval, val);
  45                 if (val) {
  46                         icc_interrupt(cs, val);
  47                         NETjet_WriteIC(cs, ICC_MASK, 0xFF);
  48                         NETjet_WriteIC(cs, ICC_MASK, 0x0);
  49                 }
  50         }
  51         save_flags(flags);
  52         cli();
  53         /* start new code 13/07/00 GE */
  54         /* set bits in sval to indicate which page is free */
  55         if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
  56                 inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
  57                 /* the 2nd write page is free */
  58                 sval = 0x08;
  59         else    /* the 1st write page is free */
  60                 sval = 0x04;
  61         if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
  62                 inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
  63                 /* the 2nd read page is free */
  64                 sval = sval | 0x02;
  65         else    /* the 1st read page is free */
  66                 sval = sval | 0x01;
  67         if (sval != cs->hw.njet.last_is0) /* we have a DMA interrupt */
  68         {
  69                 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
  70                         restore_flags(flags);
  71                         return;
  72                 }
  73                 cs->hw.njet.irqstat0 = sval;
  74                 restore_flags(flags);
  75                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
  76                         (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
  77                         /* we have a read dma int */
  78                         read_tiger(cs);
  79                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
  80                         (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
  81                         /* we have a write dma int */
  82                         write_tiger(cs);
  83                 /* end new code 13/07/00 GE */
  84                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
  85         } else
  86                 restore_flags(flags);
  87
  88 /*      if (!testcnt--) {
  89                 cs->hw.njet.dmactrl = 0;
  90                 byteout(cs->hw.njet.base + NETJET_DMACTRL,
  91                         cs->hw.njet.dmactrl);
  92                 byteout(cs->hw.njet.base + NETJET_IRQMASK0, 0);
  93         }
  94 */
  95 }
  96
  97 static void
  98 reset_netjet_u(struct IsdnCardState *cs)
  99 {
 100         long flags;
 101
 102         save_flags(flags);
 103         sti();
 104         cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 105         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 106         set_current_state(TASK_UNINTERRUPTIBLE);
 107         schedule_timeout((10*HZ)/1000); /* Timeout 10ms */
 108         cs->hw.njet.ctrl_reg = 0x40;  /* Reset Off and status read clear */
 109         /* now edge triggered for TJ320 GE 13/07/00 */
 110         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 111         set_current_state(TASK_UNINTERRUPTIBLE);
 112         schedule_timeout((10*HZ)/1000); /* Timeout 10ms */
 113         restore_flags(flags);
 114         cs->hw.njet.auxd = 0xC0;
 115         cs->hw.njet.dmactrl = 0;
 116         byteout(cs->hw.njet.auxa, 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_U_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 124 {
 125         switch (mt) {
 126                 case CARD_RESET:
 127                         reset_netjet_u(cs);
 128                         return(0);
 129                 case CARD_RELEASE:
 130                         release_io_netjet(cs);
 131                         return(0);
 132                 case CARD_INIT:
 133                         inittiger(cs);
 134                         clear_pending_icc_ints(cs);
 135                         initicc(cs);
 136                         /* Reenable all IRQ */
 137                         cs->writeisac(cs, ICC_MASK, 0);
 138                         return(0);
 139                 case CARD_TEST:
 140                         return(0);
 141         }
 142         return(0);
 143 }
 144
 145 static struct pci_dev *dev_netjet __initdata = NULL;
 146
 147 int __init
 148 setup_netjet_u(struct IsdnCard *card)
 149 {
 150         int bytecnt;
 151         struct IsdnCardState *cs = card->cs;
 152         char tmp[64];
 153         long flags;
 154 #if CONFIG_PCI
 155 #endif
 156 #ifdef __BIG_ENDIAN
 157 #error "not running on big endian machines now"
 158 #endif
 159         strcpy(tmp, NETjet_U_revision);
 160         printk(KERN_INFO "HiSax: Traverse Tech. NETspider-U driver Rev. %s\n", HiSax_getrev(tmp));
 161         if (cs->typ != ISDN_CTYPE_NETJET_U)
 162                 return(0);
 163         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 164
 165 #if CONFIG_PCI
 166
 167         for ( ;; )
 168         {
 169                 if (!pci_present()) {
 170                         printk(KERN_ERR "Netjet: no PCI bus present\n");
 171                         return(0);
 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                         cs->irq = dev_netjet->irq;
 178                         if (!cs->irq) {
 179                                 printk(KERN_WARNING "NETspider-U: No IRQ for PCI card found\n");
 180                                 return(0);
 181                         }
 182                         cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
 183                         if (!cs->hw.njet.base) {
 184                                 printk(KERN_WARNING "NETspider-U: No IO-Adr for PCI card found\n");
 185                                 return(0);
 186                         }
 187                 } else {
 188                         printk(KERN_WARNING "NETspider-U: No PCI card found\n");
 189                         return(0);
 190                 }
 191
 192                 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
 193                 cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
 194
 195                 save_flags(flags);
 196                 sti();
 197
 198                 cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 199                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 200
 201                 set_current_state(TASK_UNINTERRUPTIBLE);
 202                 schedule_timeout((10*HZ)/1000); /* Timeout 10ms */
 203
 204                 cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
 205                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 206
 207                 set_current_state(TASK_UNINTERRUPTIBLE);
 208                 schedule_timeout((10*HZ)/1000); /* Timeout 10ms */
 209
 210                 restore_flags(flags);
 211
 212                 cs->hw.njet.auxd = 0xC0;
 213                 cs->hw.njet.dmactrl = 0;
 214
 215                 byteout(cs->hw.njet.auxa, 0);
 216                 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 217                 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 218                 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 219
 220                 switch ( ( ( NETjet_ReadIC( cs, ICC_RBCH ) >> 5 ) & 3 ) )
 221                 {
 222                         case 3 :
 223                                 break;
 224
 225                         case 0 :
 226                                 printk( KERN_WARNING "NETspider-U: NETjet-S PCI card found\n" );
 227                                 continue;
 228
 229                         default :
 230                                 printk( KERN_WARNING "NETspider-U: No PCI card found\n" );
 231                                 return 0;
 232                 }
 233                 break;
 234         }
 235 #else
 236
 237         printk(KERN_WARNING "NETspider-U: NO_PCI_BIOS\n");
 238         printk(KERN_WARNING "NETspider-U: unable to config NETspider-U PCI\n");
 239         return (0);
 240
 241 #endif /* CONFIG_PCI */
 242
 243         bytecnt = 256;
 244
 245         printk(KERN_INFO
 246                 "NETspider-U: PCI card configured at 0x%x IRQ %d\n",
 247                 cs->hw.njet.base, cs->irq);
 248         if (check_region(cs->hw.njet.base, bytecnt)) {
 249                 printk(KERN_WARNING
 250                        "HiSax: %s config port %x-%x already in use\n",
 251                        CardType[card->typ],
 252                        cs->hw.njet.base,
 253                        cs->hw.njet.base + bytecnt);
 254                 return (0);
 255         } else {
 256                 request_region(cs->hw.njet.base, bytecnt, "netspider-u isdn");
 257         }
 258         reset_netjet_u(cs);
 259         cs->readisac  = &NETjet_ReadIC;
 260         cs->writeisac = &NETjet_WriteIC;
 261         cs->readisacfifo  = &NETjet_ReadICfifo;
 262         cs->writeisacfifo = &NETjet_WriteICfifo;
 263         cs->BC_Read_Reg  = &dummyrr;
 264         cs->BC_Write_Reg = &dummywr;
 265         cs->BC_Send_Data = &netjet_fill_dma;
 266         cs->cardmsg = &NETjet_U_card_msg;
 267         cs->irq_func = &netjet_u_interrupt;
 268         cs->irq_flags |= SA_SHIRQ;
 269         ICCVersion(cs, "NETspider-U:");
 270         return (1);
 271 }