drivers/isdn/hisax/nj_u.c

   1 /* $Id: nj_u.c,v 1.1.4.1 2001/11/20 14:19:36 kai 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 #define __NO_VERSION__
   9 #include <linux/config.h>
  10 #include <linux/init.h>
  11 #include "hisax.h"
  12 #include "icc.h"
  13 #include "isdnl1.h"
  14 #include <linux/pci.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/ppp_defs.h>
  17 #include "netjet.h"
  18
  19 const char *NETjet_U_revision = "$Revision: 1.1.4.1 $";
  20
  21 static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off)
  22 {
  23         return(5);
  24 }
  25
  26 static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value)
  27 {
  28 }
  29
  30 static void
  31 netjet_u_interrupt(int intno, void *dev_id, struct pt_regs *regs)
  32 {
  33         struct IsdnCardState *cs = dev_id;
  34         u_char val, sval;
  35         long flags;
  36
  37         if (!cs) {
  38                 printk(KERN_WARNING "NETspider-U: Spurious interrupt!\n");
  39                 return;
  40         }
  41         if (!((sval = bytein(cs->hw.njet.base + NETJET_IRQSTAT1)) &
  42                 NETJET_ISACIRQ)) {
  43                 val = NETjet_ReadIC(cs, ICC_ISTA);
  44                 if (cs->debug & L1_DEB_ISAC)
  45                         debugl1(cs, "tiger: i1 %x %x", sval, val);
  46                 if (val) {
  47                         icc_interrupt(cs, val);
  48                         NETjet_WriteIC(cs, ICC_MASK, 0xFF);
  49                         NETjet_WriteIC(cs, ICC_MASK, 0x0);
  50                 }
  51         }
  52         save_flags(flags);
  53         cli();
  54         /* start new code 13/07/00 GE */
  55         /* set bits in sval to indicate which page is free */
  56         if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
  57                 inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
  58                 /* the 2nd write page is free */
  59                 sval = 0x08;
  60         else    /* the 1st write page is free */
  61                 sval = 0x04;
  62         if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
  63                 inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
  64                 /* the 2nd read page is free */
  65                 sval = sval | 0x02;
  66         else    /* the 1st read page is free */
  67                 sval = sval | 0x01;
  68         if (sval != cs->hw.njet.last_is0) /* we have a DMA interrupt */
  69         {
  70                 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
  71                         restore_flags(flags);
  72                         return;
  73                 }
  74                 cs->hw.njet.irqstat0 = sval;
  75                 restore_flags(flags);
  76                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
  77                         (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
  78                         /* we have a read dma int */
  79                         read_tiger(cs);
  80                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
  81                         (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
  82                         /* we have a write dma int */
  83                         write_tiger(cs);
  84                 /* end new code 13/07/00 GE */
  85                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
  86         } else
  87                 restore_flags(flags);
  88
  89 /*      if (!testcnt--) {
  90                 cs->hw.njet.dmactrl = 0;
  91                 byteout(cs->hw.njet.base + NETJET_DMACTRL,
  92                         cs->hw.njet.dmactrl);
  93                 byteout(cs->hw.njet.base + NETJET_IRQMASK0, 0);
  94         }
  95 */
  96 }
  97
  98 static void
  99 reset_netjet_u(struct IsdnCardState *cs)
 100 {
 101         long flags;
 102
 103         save_flags(flags);
 104         sti();
 105         cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 106         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 107         set_current_state(TASK_UNINTERRUPTIBLE);
 108         schedule_timeout((10*HZ)/1000); /* Timeout 10ms */
 109         cs->hw.njet.ctrl_reg = 0x40;  /* Reset Off and status read clear */
 110         /* now edge triggered for TJ320 GE 13/07/00 */
 111         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 112         set_current_state(TASK_UNINTERRUPTIBLE);
 113         schedule_timeout((10*HZ)/1000); /* Timeout 10ms */
 114         restore_flags(flags);
 115         cs->hw.njet.auxd = 0xC0;
 116         cs->hw.njet.dmactrl = 0;
 117         byteout(cs->hw.njet.auxa, 0);
 118         byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 119         byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 120         byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 121 }
 122
 123 static int
 124 NETjet_U_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 125 {
 126         switch (mt) {
 127                 case CARD_RESET:
 128                         reset_netjet_u(cs);
 129                         return(0);
 130                 case CARD_RELEASE:
 131                         release_io_netjet(cs);
 132                         return(0);
 133                 case CARD_INIT:
 134                         inittiger(cs);
 135                         clear_pending_icc_ints(cs);
 136                         initicc(cs);
 137                         /* Reenable all IRQ */
 138                         cs->writeisac(cs, ICC_MASK, 0);
 139                         return(0);
 140                 case CARD_TEST:
 141                         return(0);
 142         }
 143         return(0);
 144 }
 145
 146 static struct pci_dev *dev_netjet __initdata = NULL;
 147
 148 int __init
 149 setup_netjet_u(struct IsdnCard *card)
 150 {
 151         int bytecnt;
 152         struct IsdnCardState *cs = card->cs;
 153         char tmp[64];
 154         long flags;
 155 #if CONFIG_PCI
 156 #endif
 157 #ifdef __BIG_ENDIAN
 158 #error "not running on big endian machines now"
 159 #endif
 160         strcpy(tmp, NETjet_U_revision);
 161         printk(KERN_INFO "HiSax: Traverse Tech. NETspider-U driver Rev. %s\n", HiSax_getrev(tmp));
 162         if (cs->typ != ISDN_CTYPE_NETJET_U)
 163                 return(0);
 164         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 165
 166 #if CONFIG_PCI
 167
 168         for ( ;; )
 169         {
 170                 if (!pci_present()) {
 171                         printk(KERN_ERR "Netjet: no PCI bus present\n");
 172                         return(0);
 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 "NETspider-U: 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 "NETspider-U: No IO-Adr for PCI card found\n");
 187                                 return(0);
 188                         }
 189                 } else {
 190                         printk(KERN_WARNING "NETspider-U: No PCI card found\n");
 191                         return(0);
 192                 }
 193
 194                 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
 195                 cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
 196
 197                 save_flags(flags);
 198                 sti();
 199
 200                 cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 201                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 202
 203                 set_current_state(TASK_UNINTERRUPTIBLE);
 204                 schedule_timeout((10*HZ)/1000); /* Timeout 10ms */
 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
 209                 set_current_state(TASK_UNINTERRUPTIBLE);
 210                 schedule_timeout((10*HZ)/1000); /* Timeout 10ms */
 211
 212                 restore_flags(flags);
 213
 214                 cs->hw.njet.auxd = 0xC0;
 215                 cs->hw.njet.dmactrl = 0;
 216
 217                 byteout(cs->hw.njet.auxa, 0);
 218                 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 219                 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 220                 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 221
 222                 switch ( ( ( NETjet_ReadIC( cs, ICC_RBCH ) >> 5 ) & 3 ) )
 223                 {
 224                         case 3 :
 225                                 break;
 226
 227                         case 0 :
 228                                 printk( KERN_WARNING "NETspider-U: NETjet-S PCI card found\n" );
 229                                 continue;
 230
 231                         default :
 232                                 printk( KERN_WARNING "NETspider-U: No PCI card found\n" );
 233                                 return 0;
 234                 }
 235                 break;
 236         }
 237 #else
 238
 239         printk(KERN_WARNING "NETspider-U: NO_PCI_BIOS\n");
 240         printk(KERN_WARNING "NETspider-U: unable to config NETspider-U PCI\n");
 241         return (0);
 242
 243 #endif /* CONFIG_PCI */
 244
 245         bytecnt = 256;
 246
 247         printk(KERN_INFO
 248                 "NETspider-U: PCI card configured at %#lx IRQ %d\n",
 249                 cs->hw.njet.base, cs->irq);
 250         if (check_region(cs->hw.njet.base, bytecnt)) {
 251                 printk(KERN_WARNING
 252                        "HiSax: %s config port %#lx-%#lx already in use\n",
 253                        CardType[card->typ],
 254                        cs->hw.njet.base,
 255                        cs->hw.njet.base + bytecnt);
 256                 return (0);
 257         } else {
 258                 request_region(cs->hw.njet.base, bytecnt, "netspider-u isdn");
 259         }
 260         reset_netjet_u(cs);
 261         cs->readisac  = &NETjet_ReadIC;
 262         cs->writeisac = &NETjet_WriteIC;
 263         cs->readisacfifo  = &NETjet_ReadICfifo;
 264         cs->writeisacfifo = &NETjet_WriteICfifo;
 265         cs->BC_Read_Reg  = &dummyrr;
 266         cs->BC_Write_Reg = &dummywr;
 267         cs->BC_Send_Data = &netjet_fill_dma;
 268         cs->cardmsg = &NETjet_U_card_msg;
 269         cs->irq_func = &netjet_u_interrupt;
 270         cs->irq_flags |= SA_SHIRQ;
 271         ICCVersion(cs, "NETspider-U:");
 272         return (1);
 273 }