drivers/isdn/hisax/enternow_pci.c

   1 /* enternow_pci.c,v 0.99 2001/10/02
   2  *
   3  * enternow_pci.c       Card-specific routines for
   4  *                      Formula-n enter:now ISDN PCI ab
   5  *                      Gerdes AG Power ISDN PCI
   6  *                      Woerltronic SA 16 PCI
   7  *                      (based on HiSax driver by Karsten Keil)
   8  *
   9  * Author               Christoph Ersfeld <info@formula-n.de>
  10  *                      Formula-n Europe AG (www.formula-n.com)
  11  *                      previously Gerdes AG
  12  *
  13  *
  14  *                      This file is (c) under GNU PUBLIC LICENSE
  15  *
  16  * Notes:
  17  * This driver interfaces to netjet.c which performs B-channel
  18  * processing.
  19  *
  20  * Version 0.99 is the first release of this driver and there are
  21  * certainly a few bugs.
  22  * It isn't testet on linux 2.4 yet, so consider this code to be
  23  * beta.
  24  *
  25  * Please don't report me any malfunction without sending
  26  * (compressed) debug-logs.
  27  * It would be nearly impossible to retrace it.
  28  *
  29  * Log D-channel-processing as follows:
  30  *
  31  * 1. Load hisax with card-specific parameters, this example ist for
  32  *    Formula-n enter:now ISDN PCI and compatible
  33  *    (f.e. Gerdes Power ISDN PCI)
  34  *
  35  *    modprobe hisax type=41 protocol=2 id=gerdes
  36  *
  37  *    if you chose an other value for id, you need to modify the
  38  *    code below, too.
  39  *
  40  * 2. set debug-level
  41  *
  42  *    hisaxctrl gerdes 1 0x3ff
  43  *    hisaxctrl gerdes 11 0x4f
  44  *    cat /dev/isdnctrl >> ~/log &
  45  *
  46  * Please take also a look into /var/log/messages if there is
  47  * anything importand concerning HISAX.
  48  *
  49  *
  50  * Credits:
  51  * Programming the driver for Formula-n enter:now ISDN PCI and
  52  * necessary the driver for the used Amd 7930 D-channel-controller
  53  * was spnsored by Formula-n Europe AG.
  54  * Thanks to Karsten Keil and Petr Novak, who gave me support in
  55  * Hisax-specific questions.
  56  * I want so say special thanks to Carl-Friedrich Braun, who had to
  57  * answer a lot of questions about generally ISDN and about handling
  58  * of the Amd-Chip.
  59  *
  60  */
  61
  62
  63 #include <linux/config.h>
  64 #include "hisax.h"
  65 #include "isac.h"
  66 #include "isdnl1.h"
  67 #include "amd7930_fn.h"
  68 #include "enternow.h"
  69 #include <linux/interrupt.h>
  70 #include <linux/ppp_defs.h>
  71 #include <linux/pci.h>
  72 #include <linux/init.h>
  73 #include "netjet.h"
  74
  75
  76
  77 const char *enternow_pci_rev = "$Revision: 1.1.4.5 $";
  78
  79
  80 /* *************************** I/O-Interface functions ************************************* */
  81
  82
  83 /* cs->readisac, macro rByteAMD */
  84 BYTE
  85 ReadByteAmd7930(struct IsdnCardState *cs, BYTE offset)
  86 {
  87         /* direktes Register */
  88         if(offset < 8)
  89                 return (InByte(cs->hw.njet.isac + 4*offset));
  90
  91         /* indirektes Register */
  92         else {
  93                 OutByte(cs->hw.njet.isac + 4*AMD_CR, offset);
  94                 return(InByte(cs->hw.njet.isac + 4*AMD_DR));
  95         }
  96 }
  97
  98 /* cs->writeisac, macro wByteAMD */
  99 void
 100 WriteByteAmd7930(struct IsdnCardState *cs, BYTE offset, BYTE value)
 101 {
 102         /* direktes Register */
 103         if(offset < 8)
 104                 OutByte(cs->hw.njet.isac + 4*offset, value);
 105
 106         /* indirektes Register */
 107         else {
 108                 OutByte(cs->hw.njet.isac + 4*AMD_CR, offset);
 109                 OutByte(cs->hw.njet.isac + 4*AMD_DR, value);
 110         }
 111 }
 112
 113
 114 void
 115 enpci_setIrqMask(struct IsdnCardState *cs, BYTE val) {
 116         if (!val)
 117                 OutByte(cs->hw.njet.base+NETJET_IRQMASK1, 0x00);
 118         else
 119                 OutByte(cs->hw.njet.base+NETJET_IRQMASK1, TJ_AMD_IRQ);
 120 }
 121
 122
 123 static BYTE dummyrr(struct IsdnCardState *cs, int chan, BYTE off)
 124 {
 125         return(5);
 126 }
 127
 128 static void dummywr(struct IsdnCardState *cs, int chan, BYTE off, BYTE value)
 129 {
 130
 131 }
 132
 133
 134 /* ******************************************************************************** */
 135
 136
 137 static void
 138 reset_enpci(struct IsdnCardState *cs)
 139 {
 140         if (cs->debug & L1_DEB_ISAC)
 141                 debugl1(cs, "enter:now PCI: reset");
 142
 143         /* Reset on, (also for AMD) */
 144         cs->hw.njet.ctrl_reg = 0x07;
 145         OutByte(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 146         mdelay(20);
 147         /* Reset off */
 148         cs->hw.njet.ctrl_reg = 0x30;
 149         OutByte(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 150         /* 20ms delay */
 151         mdelay(20);
 152         cs->hw.njet.auxd = 0;  // LED-status
 153         cs->hw.njet.dmactrl = 0;
 154         OutByte(cs->hw.njet.base + NETJET_AUXCTRL, ~TJ_AMD_IRQ);
 155         OutByte(cs->hw.njet.base + NETJET_IRQMASK1, TJ_AMD_IRQ);
 156         OutByte(cs->hw.njet.auxa, cs->hw.njet.auxd); // LED off
 157 }
 158
 159
 160 static int
 161 enpci_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 162 {
 163         u_long flags;
 164         BYTE *chan;
 165
 166         if (cs->debug & L1_DEB_ISAC)
 167                 debugl1(cs, "enter:now PCI: card_msg: 0x%04X", mt);
 168
 169         switch (mt) {
 170                 case CARD_RESET:
 171                         spin_lock_irqsave(&cs->lock, flags);
 172                         reset_enpci(cs);
 173                         Amd7930_init(cs);
 174                         spin_unlock_irqrestore(&cs->lock, flags);
 175                         break;
 176                 case CARD_RELEASE:
 177                         release_io_netjet(cs);
 178                         break;
 179                 case CARD_INIT:
 180                         reset_enpci(cs);
 181                         inittiger(cs);
 182                         /* irq must be on here */
 183                         Amd7930_init(cs);
 184                         break;
 185                 case CARD_TEST:
 186                         break;
 187                 case MDL_ASSIGN:
 188                         /* TEI assigned, LED1 on */
 189                         cs->hw.njet.auxd = TJ_AMD_IRQ << 1;
 190                         OutByte(cs->hw.njet.base + NETJET_AUXDATA, cs->hw.njet.auxd);
 191                         break;
 192                 case MDL_REMOVE:
 193                         /* TEI removed, LEDs off */
 194                         cs->hw.njet.auxd = 0;
 195                         OutByte(cs->hw.njet.base + NETJET_AUXDATA, 0x00);
 196                         break;
 197                 case MDL_BC_ASSIGN:
 198                         /* activate B-channel */
 199                         chan = (BYTE *)arg;
 200
 201                         if (cs->debug & L1_DEB_ISAC)
 202                                 debugl1(cs, "enter:now PCI: assign phys. BC %d in AMD LMR1", *chan);
 203
 204                         cs->dc.amd7930.ph_command(cs, (cs->dc.amd7930.lmr1 | (*chan + 1)), "MDL_BC_ASSIGN");
 205                         /* at least one b-channel in use, LED 2 on */
 206                         cs->hw.njet.auxd |= TJ_AMD_IRQ << 2;
 207                         OutByte(cs->hw.njet.base + NETJET_AUXDATA, cs->hw.njet.auxd);
 208                         break;
 209                 case MDL_BC_RELEASE:
 210                         /* deactivate B-channel */
 211                         chan = (BYTE *)arg;
 212
 213                         if (cs->debug & L1_DEB_ISAC)
 214                                 debugl1(cs, "enter:now PCI: release phys. BC %d in Amd LMR1", *chan);
 215
 216                         cs->dc.amd7930.ph_command(cs, (cs->dc.amd7930.lmr1 & ~(*chan + 1)), "MDL_BC_RELEASE");
 217                         /* no b-channel active -> LED2 off */
 218                         if (!(cs->dc.amd7930.lmr1 & 3)) {
 219                                 cs->hw.njet.auxd &= ~(TJ_AMD_IRQ << 2);
 220                                 OutByte(cs->hw.njet.base + NETJET_AUXDATA, cs->hw.njet.auxd);
 221                         }
 222                         break;
 223                 default:
 224                         break;
 225
 226         }
 227         return(0);
 228 }
 229
 230 static irqreturn_t
 231 enpci_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 232 {
 233         struct IsdnCardState *cs = dev_id;
 234         BYTE s0val, s1val, ir;
 235         u_long flags;
 236
 237         spin_lock_irqsave(&cs->lock, flags);
 238         s1val = InByte(cs->hw.njet.base + NETJET_IRQSTAT1);
 239
 240         /* AMD threw an interrupt */
 241         if (!(s1val & TJ_AMD_IRQ)) {
 242                 /* read and clear interrupt-register */
 243                 ir = ReadByteAmd7930(cs, 0x00);
 244                 Amd7930_interrupt(cs, ir);
 245                 s1val = 1;
 246         } else
 247                 s1val = 0;
 248         s0val = InByte(cs->hw.njet.base + NETJET_IRQSTAT0);
 249         if ((s0val | s1val)==0) { // shared IRQ
 250                 spin_unlock_irqrestore(&cs->lock, flags);
 251                 return IRQ_NONE;
 252         }
 253         if (s0val)
 254                 OutByte(cs->hw.njet.base + NETJET_IRQSTAT0, s0val);
 255
 256         /* DMA-Interrupt: B-channel-stuff */
 257         /* set bits in sval to indicate which page is free */
 258         if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
 259                 inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
 260                 /* the 2nd write page is free */
 261                 s0val = 0x08;
 262         else    /* the 1st write page is free */
 263                 s0val = 0x04;
 264         if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
 265                 inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
 266                 /* the 2nd read page is free */
 267                 s0val = s0val | 0x02;
 268         else    /* the 1st read page is free */
 269                 s0val = s0val | 0x01;
 270         if (s0val != cs->hw.njet.last_is0) /* we have a DMA interrupt */
 271         {
 272                 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
 273                         spin_unlock_irqrestore(&cs->lock, flags);
 274                         return IRQ_HANDLED;
 275                 }
 276                 cs->hw.njet.irqstat0 = s0val;
 277                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
 278                         (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
 279                         /* we have a read dma int */
 280                         read_tiger(cs);
 281                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
 282                         (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
 283                         /* we have a write dma int */
 284                         write_tiger(cs);
 285                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 286         }
 287         spin_unlock_irqrestore(&cs->lock, flags);
 288         return IRQ_HANDLED;
 289 }
 290
 291
 292 static struct pci_dev *dev_netjet __initdata = NULL;
 293
 294 /* called by config.c */
 295 int __init
 296 setup_enternow_pci(struct IsdnCard *card)
 297 {
 298         int bytecnt;
 299         struct IsdnCardState *cs = card->cs;
 300         char tmp[64];
 301
 302 #if CONFIG_PCI
 303 #ifdef __BIG_ENDIAN
 304 #error "not running on big endian machines now"
 305 #endif
 306         strcpy(tmp, enternow_pci_rev);
 307         printk(KERN_INFO "HiSax: Formula-n Europe AG enter:now ISDN PCI driver Rev. %s\n", HiSax_getrev(tmp));
 308         if (cs->typ != ISDN_CTYPE_ENTERNOW)
 309                 return(0);
 310         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 311
 312         for ( ;; )
 313         {
 314                 if ((dev_netjet = pci_find_device(PCI_VENDOR_ID_TIGERJET,
 315                         PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
 316                         if (pci_enable_device(dev_netjet))
 317                                 return(0);
 318                         cs->irq = dev_netjet->irq;
 319                         if (!cs->irq) {
 320                                 printk(KERN_WARNING "enter:now PCI: No IRQ for PCI card found\n");
 321                                 return(0);
 322                         }
 323                         cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
 324                         if (!cs->hw.njet.base) {
 325                                 printk(KERN_WARNING "enter:now PCI: No IO-Adr for PCI card found\n");
 326                                 return(0);
 327                         }
 328                         /* checks Sub-Vendor ID because system crashes with Traverse-Card */
 329                         if ((dev_netjet->subsystem_vendor != 0x55) ||
 330                                 (dev_netjet->subsystem_device != 0x02)) {
 331                                 printk(KERN_WARNING "enter:now: You tried to load this driver with an incompatible TigerJet-card\n");
 332                                 printk(KERN_WARNING "Use type=20 for Traverse NetJet PCI Card.\n");
 333                                 return(0);
 334                         }
 335                 } else {
 336                         printk(KERN_WARNING "enter:now PCI: No PCI card found\n");
 337                         return(0);
 338                 }
 339
 340                 cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
 341                 cs->hw.njet.isac = cs->hw.njet.base + 0xC0; // Fenster zum AMD
 342
 343                 /* Reset an */
 344                 cs->hw.njet.ctrl_reg = 0x07;  // geändert von 0xff
 345                 OutByte(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 346                 /* 20 ms Pause */
 347                 mdelay(20);
 348
 349                 cs->hw.njet.ctrl_reg = 0x30;  /* Reset Off and status read clear */
 350                 OutByte(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
 351                 mdelay(10);
 352
 353                 cs->hw.njet.auxd = 0x00; // war 0xc0
 354                 cs->hw.njet.dmactrl = 0;
 355
 356                 OutByte(cs->hw.njet.base + NETJET_AUXCTRL, ~TJ_AMD_IRQ);
 357                 OutByte(cs->hw.njet.base + NETJET_IRQMASK1, TJ_AMD_IRQ);
 358                 OutByte(cs->hw.njet.auxa, cs->hw.njet.auxd);
 359
 360                 break;
 361         }
 362 #else
 363
 364         printk(KERN_WARNING "enter:now PCI: NO_PCI_BIOS\n");
 365         printk(KERN_WARNING "enter:now PCI: unable to config Formula-n enter:now ISDN PCI ab\n");
 366         return (0);
 367
 368 #endif /* CONFIG_PCI */
 369
 370         bytecnt = 256;
 371
 372         printk(KERN_INFO
 373                 "enter:now PCI: PCI card configured at 0x%lx IRQ %d\n",
 374                 cs->hw.njet.base, cs->irq);
 375         if (!request_region(cs->hw.njet.base, bytecnt, "Fn_ISDN")) {
 376                 printk(KERN_WARNING
 377                            "HiSax: %s config port %lx-%lx already in use\n",
 378                            CardType[card->typ],
 379                            cs->hw.njet.base,
 380                            cs->hw.njet.base + bytecnt);
 381                 return (0);
 382         }
 383         setup_Amd7930(cs);
 384         cs->hw.njet.last_is0 = 0;
 385         /* macro rByteAMD */
 386         cs->readisac = &ReadByteAmd7930;
 387         /* macro wByteAMD */
 388         cs->writeisac = &WriteByteAmd7930;
 389         cs->dc.amd7930.setIrqMask = &enpci_setIrqMask;
 390
 391         cs->BC_Read_Reg  = &dummyrr;
 392         cs->BC_Write_Reg = &dummywr;
 393         cs->BC_Send_Data = &netjet_fill_dma;
 394         cs->cardmsg = &enpci_card_msg;
 395         cs->irq_func = &enpci_interrupt;
 396         cs->irq_flags |= SA_SHIRQ;
 397
 398         return (1);
 399 }