drivers/isdn/hisax/nj_u.c

   1 /* $Id: nj_u.c,v 2.14.2.3 2004/01/13 14:31:26 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 "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: 2.14.2.3 $";
  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_u_interrupt(int intno, void *dev_id, struct pt_regs *regs)
  31 {
  32         struct IsdnCardState *cs = dev_id;
  33         u_char val, sval;
  34         u_long flags;
  35
  36         spin_lock_irqsave(&cs->lock, flags);
  37         if (!((sval = bytein(cs->hw.njet.base + NETJET_IRQSTAT1)) &
  38                 NETJET_ISACIRQ)) {
  39                 val = NETjet_ReadIC(cs, ICC_ISTA);
  40                 if (cs->debug & L1_DEB_ISAC)
  41                         debugl1(cs, "tiger: i1 %x %x", sval, val);
  42                 if (val) {
  43                         icc_interrupt(cs, val);
  44                         NETjet_WriteIC(cs, ICC_MASK, 0xFF);
  45                         NETjet_WriteIC(cs, ICC_MASK, 0x0);
  46                 }
  47         }
  48         /* start new code 13/07/00 GE */
  49         /* set bits in sval to indicate which page is free */
  50         if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
  51                 inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
  52                 /* the 2nd write page is free */
  53                 sval = 0x08;
  54         else    /* the 1st write page is free */
  55                 sval = 0x04;
  56         if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
  57                 inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
  58                 /* the 2nd read page is free */
  59                 sval = sval | 0x02;
  60         else    /* the 1st read page is free */
  61                 sval = sval | 0x01;
  62         if (sval != cs->hw.njet.last_is0) /* we have a DMA interrupt */
  63         {
  64                 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
  65                         spin_unlock_irqrestore(&cs->lock, flags);
  66                         return IRQ_HANDLED;
  67                 }
  68                 cs->hw.njet.irqstat0 = sval;
  69                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
  70                         (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
  71                         /* we have a read dma int */
  72                         read_tiger(cs);
  73                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
  74                         (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
  75                         /* we have a write dma int */
  76                         write_tiger(cs);
  77                 /* end new code 13/07/00 GE */
  78                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
  79         }
  80         spin_unlock_irqrestore(&cs->lock, flags);
  81         return IRQ_HANDLED;
  82 }
  83
  84 static void
  85 reset_netjet_u(struct IsdnCardState *cs)
  86 {
  87         cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
  88         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
  89         mdelay(10);
  90         cs->hw.njet.ctrl_reg = 0x40;  /* Reset Off and status read clear */
  91         /* now edge triggered for TJ320 GE 13/07/00 */
  92         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
  93         mdelay(10);
  94         cs->hw.njet.auxd = 0xC0;
  95         cs->hw.njet.dmactrl = 0;
  96         byteout(cs->hw.njet.auxa, 0);
  97         byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
  98         byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
  99         byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 100 }
 101
 102 static int
 103 NETjet_U_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 104 {
 105         u_long flags;
 106
 107         switch (mt) {
 108                 case CARD_RESET:
 109                         spin_lock_irqsave(&cs->lock, flags);
 110                         reset_netjet_u(cs);
 111                         spin_unlock_irqrestore(&cs->lock, flags);
 112                         return(0);
 113                 case CARD_RELEASE:
 114                         release_io_netjet(cs);
 115                         return(0);
 116                 case CARD_INIT:
 117                         spin_lock_irqsave(&cs->lock, flags);
 118                         inittiger(cs);
 119                         reset_netjet_u(cs);
 120                         clear_pending_icc_ints(cs);
 121                         initicc(cs);
 122                         /* Reenable all IRQ */
 123                         cs->writeisac(cs, ICC_MASK, 0);
 124                         spin_unlock_irqrestore(&cs->lock, flags);
 125                         return(0);
 126                 case CARD_TEST:
 127                         return(0);
 128         }
 129         return(0);
 130 }
 131
 132 static struct pci_dev *dev_netjet __initdata = NULL;
 133
 134 int __init
 135 setup_netjet_u(struct IsdnCard *card)
 136 {
 137         int bytecnt;
 138         struct IsdnCardState *cs = card->cs;
 139         char tmp[64];
 140 #ifdef CONFIG_PCI
 141 #endif
 142 #ifdef __BIG_ENDIAN
 143 #error "not running on big endian machines now"
 144 #endif
 145         strcpy(tmp, NETjet_U_revision);
 146         printk(KERN_INFO "HiSax: Traverse Tech. NETspider-U driver Rev. %s\n", HiSax_getrev(tmp));
 147         if (cs->typ != ISDN_CTYPE_NETJET_U)
 148                 return(0);
 149         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 150
 151 #ifdef CONFIG_PCI
 152
 153         for ( ;; )
 154         {
 155                 if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET,
 156                         PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
 157                         if (pci_enable_device(dev_netjet))
 158                                 return(0);
 159                         pci_set_master(dev_netjet);
 160                         cs->irq = dev_netjet->irq;
 161                         if (!cs->irq) {
 162                                 printk(KERN_WARNING "NETspider-U: No IRQ for PCI card found\n");
 163                                 return(0);
 164                         }
 165                         cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
 166                         if (!cs->hw.njet.base) {
 167                                 printk(KERN_WARNING "NETspider-U: No IO-Adr for PCI card found\n");
 168                                 return(0);
 169                         }
 170                 } else {
 171                         printk(KERN_WARNING "NETspider-U: No PCI card found\n");
 172                         return(0);
 173                 }
 174
 175                 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
 176                 cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
 177                 mdelay(10);
 178
 179                 cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 180                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 181                 mdelay(10);
 182
 183                 cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
 184                 byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 185                 mdelay(10);
 186
 187                 cs->hw.njet.auxd = 0xC0;
 188                 cs->hw.njet.dmactrl = 0;
 189
 190                 byteout(cs->hw.njet.auxa, 0);
 191                 byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 192                 byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 193                 byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 194
 195                 switch ( ( ( NETjet_ReadIC( cs, ICC_RBCH ) >> 5 ) & 3 ) )
 196                 {
 197                         case 3 :
 198                                 break;
 199
 200                         case 0 :
 201                                 printk( KERN_WARNING "NETspider-U: NETjet-S PCI card found\n" );
 202                                 continue;
 203
 204                         default :
 205                                 printk( KERN_WARNING "NETspider-U: No PCI card found\n" );
 206                                 return 0;
 207                 }
 208                 break;
 209         }
 210 #else
 211
 212         printk(KERN_WARNING "NETspider-U: NO_PCI_BIOS\n");
 213         printk(KERN_WARNING "NETspider-U: unable to config NETspider-U PCI\n");
 214         return (0);
 215
 216 #endif /* CONFIG_PCI */
 217
 218         bytecnt = 256;
 219
 220         printk(KERN_INFO
 221                 "NETspider-U: PCI card configured at %#lx IRQ %d\n",
 222                 cs->hw.njet.base, cs->irq);
 223         if (!request_region(cs->hw.njet.base, bytecnt, "netspider-u isdn")) {
 224                 printk(KERN_WARNING
 225                        "HiSax: %s config port %#lx-%#lx already in use\n",
 226                        CardType[card->typ],
 227                        cs->hw.njet.base,
 228                        cs->hw.njet.base + bytecnt);
 229                 return (0);
 230         }
 231         setup_icc(cs);
 232         cs->readisac  = &NETjet_ReadIC;
 233         cs->writeisac = &NETjet_WriteIC;
 234         cs->readisacfifo  = &NETjet_ReadICfifo;
 235         cs->writeisacfifo = &NETjet_WriteICfifo;
 236         cs->BC_Read_Reg  = &dummyrr;
 237         cs->BC_Write_Reg = &dummywr;
 238         cs->BC_Send_Data = &netjet_fill_dma;
 239         cs->cardmsg = &NETjet_U_card_msg;
 240         cs->irq_func = &netjet_u_interrupt;
 241         cs->irq_flags |= SA_SHIRQ;
 242         ICCVersion(cs, "NETspider-U:");
 243         return (1);
 244 }