LXR linux/drivers/isdn/hisax/enternow

   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
  75static 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 */
  96static unsigned char
  97ReadByteAmd7930(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 */
 111static void
 112WriteByteAmd7930(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
 126static void
 127enpci_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
 135static unsigned char dummyrr(struct IsdnCardState *cs, int chan, unsigned char off)
 136{
 137        return (5);
 138}
 139
 140static void dummywr(struct IsdnCardState *cs, int chan, unsigned char off, unsigned char value)
 141{
 142
 143}
 144
 145
 146/* ******************************************************************************** */
 147
 148
 149static void
 150reset_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
 172static int
 173enpci_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
 242static irqreturn_t
 243enpci_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
 303static 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
 328static 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
 351static 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
 384static struct pci_dev *dev_netjet = NULL;
 385
 386/* called by config.c */
 387int 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}
 421