kernel/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/init.h>
   9 #include "hisax.h"
  10 #include "icc.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_U_revision = "$Revision: 2.14.2.3 $";
  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_u_interrupt(int intno, void *dev_id)
  30 {
  31         struct IsdnCardState *cs = dev_id;
  32         u_char val, sval;
  33         u_long flags;
  34
  35         spin_lock_irqsave(&cs->lock, flags);
  36         if (!((sval = bytein(cs->hw.njet.base + NETJET_IRQSTAT1)) &
  37               NETJET_ISACIRQ)) {
  38                 val = NETjet_ReadIC(cs, ICC_ISTA);
  39                 if (cs->debug & L1_DEB_ISAC)
  40                         debugl1(cs, "tiger: i1 %x %x", sval, val);
  41                 if (val) {
  42                         icc_interrupt(cs, val);
  43                         NETjet_WriteIC(cs, ICC_MASK, 0xFF);
  44                         NETjet_WriteIC(cs, ICC_MASK, 0x0);
  45                 }
  46         }
  47         /* start new code 13/07/00 GE */
  48         /* set bits in sval to indicate which page is free */
  49         if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
  50             inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
  51                 /* the 2nd write page is free */
  52                 sval = 0x08;
  53         else    /* the 1st write page is free */
  54                 sval = 0x04;
  55         if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
  56             inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
  57                 /* the 2nd read page is free */
  58                 sval = sval | 0x02;
  59         else    /* the 1st read page is free */
  60                 sval = sval | 0x01;
  61         if (sval != cs->hw.njet.last_is0) /* we have a DMA interrupt */
  62         {
  63                 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
  64                         spin_unlock_irqrestore(&cs->lock, flags);
  65                         return IRQ_HANDLED;
  66                 }
  67                 cs->hw.njet.irqstat0 = sval;
  68                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
  69                     (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
  70                         /* we have a read dma int */
  71                         read_tiger(cs);
  72                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
  73                     (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
  74                         /* we have a write dma int */
  75                         write_tiger(cs);
  76                 /* end new code 13/07/00 GE */
  77                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
  78         }
  79         spin_unlock_irqrestore(&cs->lock, flags);
  80         return IRQ_HANDLED;
  81 }
  82
  83 static void
  84 reset_netjet_u(struct IsdnCardState *cs)
  85 {
  86         cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
  87         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
  88         mdelay(10);
  89         cs->hw.njet.ctrl_reg = 0x40;  /* Reset Off and status read clear */
  90         /* now edge triggered for TJ320 GE 13/07/00 */
  91         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
  92         mdelay(10);
  93         cs->hw.njet.auxd = 0xC0;
  94         cs->hw.njet.dmactrl = 0;
  95         byteout(cs->hw.njet.auxa, 0);
  96         byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
  97         byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
  98         byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
  99 }
 100
 101 static int
 102 NETjet_U_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 103 {
 104         u_long flags;
 105
 106         switch (mt) {
 107         case CARD_RESET:
 108                 spin_lock_irqsave(&cs->lock, flags);
 109                 reset_netjet_u(cs);
 110                 spin_unlock_irqrestore(&cs->lock, flags);
 111                 return (0);
 112         case CARD_RELEASE:
 113                 release_io_netjet(cs);
 114                 return (0);
 115         case CARD_INIT:
 116                 spin_lock_irqsave(&cs->lock, flags);
 117                 inittiger(cs);
 118                 reset_netjet_u(cs);
 119                 clear_pending_icc_ints(cs);
 120                 initicc(cs);
 121                 /* Reenable all IRQ */
 122                 cs->writeisac(cs, ICC_MASK, 0);
 123                 spin_unlock_irqrestore(&cs->lock, flags);
 124                 return (0);
 125         case CARD_TEST:
 126                 return (0);
 127         }
 128         return (0);
 129 }
 130
 131 static int nju_pci_probe(struct pci_dev *dev_netjet, struct IsdnCardState *cs)
 132 {
 133         if (pci_enable_device(dev_netjet))
 134                 return (0);
 135         pci_set_master(dev_netjet);
 136         cs->irq = dev_netjet->irq;
 137         if (!cs->irq) {
 138                 printk(KERN_WARNING "NETspider-U: No IRQ for PCI card found\n");
 139                 return (0);
 140         }
 141         cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
 142         if (!cs->hw.njet.base) {
 143                 printk(KERN_WARNING "NETspider-U: No IO-Adr for PCI card found\n");
 144                 return (0);
 145         }
 146
 147         return (1);
 148 }
 149
 150 static int nju_cs_init(struct IsdnCard *card, struct IsdnCardState *cs)
 151 {
 152         cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
 153         cs->hw.njet.isac = cs->hw.njet.base | NETJET_ISAC_OFF;
 154         mdelay(10);
 155
 156         cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
 157         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 158         mdelay(10);
 159
 160         cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
 161         byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 162         mdelay(10);
 163
 164         cs->hw.njet.auxd = 0xC0;
 165         cs->hw.njet.dmactrl = 0;
 166
 167         byteout(cs->hw.njet.auxa, 0);
 168         byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
 169         byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
 170         byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
 171
 172         switch (((NETjet_ReadIC(cs, ICC_RBCH) >> 5) & 3))
 173         {
 174         case 3:
 175                 return 1;       /* end loop */
 176
 177         case 0:
 178                 printk(KERN_WARNING "NETspider-U: NETjet-S PCI card found\n");
 179                 return -1;      /* continue looping */
 180
 181         default:
 182                 printk(KERN_WARNING "NETspider-U: No PCI card found\n");
 183                 return 0;       /* end loop & function */
 184         }
 185         return 1;                       /* end loop */
 186 }
 187
 188 static int nju_cs_init_rest(struct IsdnCard *card, struct IsdnCardState *cs)
 189 {
 190         const int bytecnt = 256;
 191
 192         printk(KERN_INFO
 193                "NETspider-U: PCI card configured at %#lx IRQ %d\n",
 194                cs->hw.njet.base, cs->irq);
 195         if (!request_region(cs->hw.njet.base, bytecnt, "netspider-u isdn")) {
 196                 printk(KERN_WARNING
 197                        "HiSax: NETspider-U config port %#lx-%#lx "
 198                        "already in use\n",
 199                        cs->hw.njet.base,
 200                        cs->hw.njet.base + bytecnt);
 201                 return (0);
 202         }
 203         setup_icc(cs);
 204         cs->readisac  = &NETjet_ReadIC;
 205         cs->writeisac = &NETjet_WriteIC;
 206         cs->readisacfifo  = &NETjet_ReadICfifo;
 207         cs->writeisacfifo = &NETjet_WriteICfifo;
 208         cs->BC_Read_Reg  = &dummyrr;
 209         cs->BC_Write_Reg = &dummywr;
 210         cs->BC_Send_Data = &netjet_fill_dma;
 211         cs->cardmsg = &NETjet_U_card_msg;
 212         cs->irq_func = &netjet_u_interrupt;
 213         cs->irq_flags |= IRQF_SHARED;
 214         ICCVersion(cs, "NETspider-U:");
 215
 216         return (1);
 217 }
 218
 219 static struct pci_dev *dev_netjet = NULL;
 220
 221 int setup_netjet_u(struct IsdnCard *card)
 222 {
 223         int ret;
 224         struct IsdnCardState *cs = card->cs;
 225         char tmp[64];
 226
 227 #ifdef __BIG_ENDIAN
 228 #error "not running on big endian machines now"
 229 #endif
 230
 231         strcpy(tmp, NETjet_U_revision);
 232         printk(KERN_INFO "HiSax: Traverse Tech. NETspider-U driver Rev. %s\n", HiSax_getrev(tmp));
 233         if (cs->typ != ISDN_CTYPE_NETJET_U)
 234                 return (0);
 235         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 236
 237         for (;;)
 238         {
 239                 if ((dev_netjet = hisax_find_pci_device(PCI_VENDOR_ID_TIGERJET,
 240                                                         PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
 241                         ret = nju_pci_probe(dev_netjet, cs);
 242                         if (!ret)
 243                                 return (0);
 244                 } else {
 245                         printk(KERN_WARNING "NETspider-U: No PCI card found\n");
 246                         return (0);
 247                 }
 248
 249                 ret = nju_cs_init(card, cs);
 250                 if (!ret)
 251                         return (0);
 252                 if (ret > 0)
 253                         break;
 254                 /* ret < 0 == continue looping */
 255         }
 256
 257         return nju_cs_init_rest(card, cs);
 258 }