LXR linux/drivers/isdn/hisax/nj

   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
  17static const char *NETjet_U_revision = "$Revision: 2.14.2.3 $";
  18
  19static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off)
  20{
  21        return (5);
  22}
  23
  24static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value)
  25{
  26}
  27
  28static irqreturn_t
  29netjet_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
  83static void
  84reset_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
 101static int
 102NETjet_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
 131static 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
 150static 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
 188static 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
 219static struct pci_dev *dev_netjet = NULL;
 220
 221int 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}
 259