kernel/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 "hisax.h"
  64 #include "isac.h"
  65 #include "isdnl1.h"
  66 #include "amd7930_fn.h"
  67 #include <linux/interrupt.h>
  68 #include <linux/ppp_defs.h>
  69 #include <linux/pci.h>
  70 #include <linux/init.h>
  71 #include "netjet.h"
  72
  73
  74
  75 static const char *enternow_pci_rev = "$Revision: 1.1.4.5 $";
  76
  77
  78 /* for PowerISDN PCI */
  79 #define TJ_AMD_IRQ                                              0x20
  80 #define TJ_LED1                                                 0x40
  81 #define TJ_LED2                                                 0x80
  82
  83
  84 /* The window to [the] AMD [chip]...
  85  * From address hw.njet.base + TJ_AMD_PORT onwards, the AMD
  86  * maps [consecutive/multiple] 8 bits into the TigerJet I/O space
  87  * -> 0x01 of the AMD at hw.njet.base + 0C4 */
  88 #define TJ_AMD_PORT                                             0xC0
  89
  90
  91
  92 /* *************************** I/O-Interface functions ************************************* */
  93
  94
  95 /* cs->readisac, macro rByteAMD */
  96 static unsigned char
  97 ReadByteAmd7930(struct IsdnCardState *cs, unsigned char offset)
  98 {
  99         /* direct register */
 100         if (offset < 8)
 101                 return (inb(cs->hw.njet.isac + 4 * offset));
 102
 103         /* indirect register */
 104         else {
 105                 outb(offset, cs->hw.njet.isac + 4 * AMD_CR);
 106                 return (inb(cs->hw.njet.isac + 4 * AMD_DR));
 107         }
 108 }
 109
 110 /* cs->writeisac, macro wByteAMD */
 111 static void
 112 WriteByteAmd7930(struct IsdnCardState *cs, unsigned char offset, unsigned char value)
 113 {
 114         /* direct register */
 115         if (offset < 8)
 116                 outb(value, cs->hw.njet.isac + 4 * offset);
 117
 118         /* indirect register */
 119         else {
 120                 outb(offset, cs->hw.njet.isac + 4 * AMD_CR);
 121                 outb(value, cs->hw.njet.isac + 4 * AMD_DR);
 122         }
 123 }
 124
 125
 126 static void
 127 enpci_setIrqMask(struct IsdnCardState *cs, unsigned char val) {
 128         if (!val)
 129                 outb(0x00, cs->hw.njet.base + NETJET_IRQMASK1);
 130         else
 131                 outb(TJ_AMD_IRQ, cs->hw.njet.base + NETJET_IRQMASK1);
 132 }
 133
 134
 135 static unsigned char dummyrr(struct IsdnCardState *cs, int chan, unsigned char off)
 136 {
 137         return (5);
 138 }
 139
 140 static void dummywr(struct IsdnCardState *cs, int chan, unsigned char off, unsigned char value)
 141 {
 142
 143 }
 144
 145
 146 /* ******************************************************************************** */
 147
 148
 149 static void
 150 reset_enpci(struct IsdnCardState *cs)
 151 {
 152         if (cs->debug & L1_DEB_ISAC)
 153                 debugl1(cs, "enter:now PCI: reset");
 154
 155         /* Reset on, (also for AMD) */
 156         cs->hw.njet.ctrl_reg = 0x07;
 157         outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
 158         mdelay(20);
 159         /* Reset off */
 160         cs->hw.njet.ctrl_reg = 0x30;
 161         outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
 162         /* 20ms delay */
 163         mdelay(20);
 164         cs->hw.njet.auxd = 0;  // LED-status
 165         cs->hw.njet.dmactrl = 0;
 166         outb(~TJ_AMD_IRQ, cs->hw.njet.base + NETJET_AUXCTRL);
 167         outb(TJ_AMD_IRQ, cs->hw.njet.base + NETJET_IRQMASK1);
 168         outb(cs->hw.njet.auxd, cs->hw.njet.auxa); // LED off
 169 }
 170
 171
 172 static int
 173 enpci_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 174 {
 175         u_long flags;
 176         unsigned char *chan;
 177
 178         if (cs->debug & L1_DEB_ISAC)
 179                 debugl1(cs, "enter:now PCI: card_msg: 0x%04X", mt);
 180
 181         switch (mt) {
 182         case CARD_RESET:
 183                 spin_lock_irqsave(&cs->lock, flags);
 184                 reset_enpci(cs);
 185                 Amd7930_init(cs);
 186                 spin_unlock_irqrestore(&cs->lock, flags);
 187                 break;
 188         case CARD_RELEASE:
 189                 release_io_netjet(cs);
 190                 break;
 191         case CARD_INIT:
 192                 reset_enpci(cs);
 193                 inittiger(cs);
 194                 /* irq must be on here */
 195                 Amd7930_init(cs);
 196                 break;
 197         case CARD_TEST:
 198                 break;
 199         case MDL_ASSIGN:
 200                 /* TEI assigned, LED1 on */
 201                 cs->hw.njet.auxd = TJ_AMD_IRQ << 1;
 202                 outb(cs->hw.njet.auxd, cs->hw.njet.base + NETJET_AUXDATA);
 203                 break;
 204         case MDL_REMOVE:
 205                 /* TEI removed, LEDs off */
 206                 cs->hw.njet.auxd = 0;
 207                 outb(0x00, cs->hw.njet.base + NETJET_AUXDATA);
 208                 break;
 209         case MDL_BC_ASSIGN:
 210                 /* activate B-channel */
 211                 chan = (unsigned char *)arg;
 212
 213                 if (cs->debug & L1_DEB_ISAC)
 214                         debugl1(cs, "enter:now PCI: assign phys. BC %d in AMD LMR1", *chan);
 215
 216                 cs->dc.amd7930.ph_command(cs, (cs->dc.amd7930.lmr1 | (*chan + 1)), "MDL_BC_ASSIGN");
 217                 /* at least one b-channel in use, LED 2 on */
 218                 cs->hw.njet.auxd |= TJ_AMD_IRQ << 2;
 219                 outb(cs->hw.njet.auxd, cs->hw.njet.base + NETJET_AUXDATA);
 220                 break;
 221         case MDL_BC_RELEASE:
 222                 /* deactivate B-channel */
 223                 chan = (unsigned char *)arg;
 224
 225                 if (cs->debug & L1_DEB_ISAC)
 226                         debugl1(cs, "enter:now PCI: release phys. BC %d in Amd LMR1", *chan);
 227
 228                 cs->dc.amd7930.ph_command(cs, (cs->dc.amd7930.lmr1 & ~(*chan + 1)), "MDL_BC_RELEASE");
 229                 /* no b-channel active -> LED2 off */
 230                 if (!(cs->dc.amd7930.lmr1 & 3)) {
 231                         cs->hw.njet.auxd &= ~(TJ_AMD_IRQ << 2);
 232                         outb(cs->hw.njet.auxd, cs->hw.njet.base + NETJET_AUXDATA);
 233                 }
 234                 break;
 235         default:
 236                 break;
 237
 238         }
 239         return (0);
 240 }
 241
 242 static irqreturn_t
 243 enpci_interrupt(int intno, void *dev_id)
 244 {
 245         struct IsdnCardState *cs = dev_id;
 246         unsigned char s0val, s1val, ir;
 247         u_long flags;
 248
 249         spin_lock_irqsave(&cs->lock, flags);
 250         s1val = inb(cs->hw.njet.base + NETJET_IRQSTAT1);
 251
 252         /* AMD threw an interrupt */
 253         if (!(s1val & TJ_AMD_IRQ)) {
 254                 /* read and clear interrupt-register */
 255                 ir = ReadByteAmd7930(cs, 0x00);
 256                 Amd7930_interrupt(cs, ir);
 257                 s1val = 1;
 258         } else
 259                 s1val = 0;
 260         s0val = inb(cs->hw.njet.base + NETJET_IRQSTAT0);
 261         if ((s0val | s1val) == 0) { // shared IRQ
 262                 spin_unlock_irqrestore(&cs->lock, flags);
 263                 return IRQ_NONE;
 264         }
 265         if (s0val)
 266                 outb(s0val, cs->hw.njet.base + NETJET_IRQSTAT0);
 267
 268         /* DMA-Interrupt: B-channel-stuff */
 269         /* set bits in sval to indicate which page is free */
 270         if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
 271             inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
 272                 /* the 2nd write page is free */
 273                 s0val = 0x08;
 274         else    /* the 1st write page is free */
 275                 s0val = 0x04;
 276         if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
 277             inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
 278                 /* the 2nd read page is free */
 279                 s0val = s0val | 0x02;
 280         else    /* the 1st read page is free */
 281                 s0val = s0val | 0x01;
 282         if (s0val != cs->hw.njet.last_is0) /* we have a DMA interrupt */
 283         {
 284                 if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
 285                         spin_unlock_irqrestore(&cs->lock, flags);
 286                         return IRQ_HANDLED;
 287                 }
 288                 cs->hw.njet.irqstat0 = s0val;
 289                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
 290                     (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
 291                         /* we have a read dma int */
 292                         read_tiger(cs);
 293                 if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
 294                     (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
 295                         /* we have a write dma int */
 296                         write_tiger(cs);
 297                 test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 298         }
 299         spin_unlock_irqrestore(&cs->lock, flags);
 300         return IRQ_HANDLED;
 301 }
 302
 303 static int en_pci_probe(struct pci_dev *dev_netjet, struct IsdnCardState *cs)
 304 {
 305         if (pci_enable_device(dev_netjet))
 306                 return (0);
 307         cs->irq = dev_netjet->irq;
 308         if (!cs->irq) {
 309                 printk(KERN_WARNING "enter:now PCI: No IRQ for PCI card found\n");
 310                 return (0);
 311         }
 312         cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
 313         if (!cs->hw.njet.base) {
 314                 printk(KERN_WARNING "enter:now PCI: No IO-Adr for PCI card found\n");
 315                 return (0);
 316         }
 317         /* checks Sub-Vendor ID because system crashes with Traverse-Card */
 318         if ((dev_netjet->subsystem_vendor != 0x55) ||
 319             (dev_netjet->subsystem_device != 0x02)) {
 320                 printk(KERN_WARNING "enter:now: You tried to load this driver with an incompatible TigerJet-card\n");
 321                 printk(KERN_WARNING "Use type=20 for Traverse NetJet PCI Card.\n");
 322                 return (0);
 323         }
 324
 325         return (1);
 326 }
 327
 328 static void en_cs_init(struct IsdnCard *card, struct IsdnCardState *cs)
 329 {
 330         cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
 331         cs->hw.njet.isac = cs->hw.njet.base + 0xC0; // Fenster zum AMD
 332
 333         /* Reset an */
 334         cs->hw.njet.ctrl_reg = 0x07;  // geändert von 0xff
 335         outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
 336         /* 20 ms Pause */
 337         mdelay(20);
 338
 339         cs->hw.njet.ctrl_reg = 0x30;  /* Reset Off and status read clear */
 340         outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
 341         mdelay(10);
 342
 343         cs->hw.njet.auxd = 0x00; // war 0xc0
 344         cs->hw.njet.dmactrl = 0;
 345
 346         outb(~TJ_AMD_IRQ, cs->hw.njet.base + NETJET_AUXCTRL);
 347         outb(TJ_AMD_IRQ, cs->hw.njet.base + NETJET_IRQMASK1);
 348         outb(cs->hw.njet.auxd, cs->hw.njet.auxa);
 349 }
 350
 351 static int en_cs_init_rest(struct IsdnCard *card, struct IsdnCardState *cs)
 352 {
 353         const int bytecnt = 256;
 354
 355         printk(KERN_INFO
 356                "enter:now PCI: PCI card configured at 0x%lx IRQ %d\n",
 357                cs->hw.njet.base, cs->irq);
 358         if (!request_region(cs->hw.njet.base, bytecnt, "Fn_ISDN")) {
 359                 printk(KERN_WARNING
 360                        "HiSax: enter:now config port %lx-%lx already in use\n",
 361                        cs->hw.njet.base,
 362                        cs->hw.njet.base + bytecnt);
 363                 return (0);
 364         }
 365
 366         setup_Amd7930(cs);
 367         cs->hw.njet.last_is0 = 0;
 368         /* macro rByteAMD */
 369         cs->readisac = &ReadByteAmd7930;
 370         /* macro wByteAMD */
 371         cs->writeisac = &WriteByteAmd7930;
 372         cs->dc.amd7930.setIrqMask = &enpci_setIrqMask;
 373
 374         cs->BC_Read_Reg  = &dummyrr;
 375         cs->BC_Write_Reg = &dummywr;
 376         cs->BC_Send_Data = &netjet_fill_dma;
 377         cs->cardmsg = &enpci_card_msg;
 378         cs->irq_func = &enpci_interrupt;
 379         cs->irq_flags |= IRQF_SHARED;
 380
 381         return (1);
 382 }
 383
 384 static struct pci_dev *dev_netjet = NULL;
 385
 386 /* called by config.c */
 387 int setup_enternow_pci(struct IsdnCard *card)
 388 {
 389         int ret;
 390         struct IsdnCardState *cs = card->cs;
 391         char tmp[64];
 392
 393 #ifdef __BIG_ENDIAN
 394 #error "not running on big endian machines now"
 395 #endif
 396
 397         strcpy(tmp, enternow_pci_rev);
 398         printk(KERN_INFO "HiSax: Formula-n Europe AG enter:now ISDN PCI driver Rev. %s\n", HiSax_getrev(tmp));
 399         if (cs->typ != ISDN_CTYPE_ENTERNOW)
 400                 return (0);
 401         test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
 402
 403         for (;;)
 404         {
 405                 if ((dev_netjet = hisax_find_pci_device(PCI_VENDOR_ID_TIGERJET,
 406                                                         PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
 407                         ret = en_pci_probe(dev_netjet, cs);
 408                         if (!ret)
 409                                 return (0);
 410                 } else {
 411                         printk(KERN_WARNING "enter:now PCI: No PCI card found\n");
 412                         return (0);
 413                 }
 414
 415                 en_cs_init(card, cs);
 416                 break;
 417         }
 418
 419         return en_cs_init_rest(card, cs);
 420 }