include/asm-sparc64/floppy.h

   1 /* $Id: floppy.h,v 1.32 2001/10/26 17:59:36 davem Exp $
   2  * asm-sparc64/floppy.h: Sparc specific parts of the Floppy driver.
   3  *
   4  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   5  * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   6  *
   7  * Ultra/PCI support added: Sep 1997  Eddie C. Dost  (ecd@skynet.be)
   8  */
   9
  10 #ifndef __ASM_SPARC64_FLOPPY_H
  11 #define __ASM_SPARC64_FLOPPY_H
  12
  13 #include <linux/init.h>
  14
  15 #include <asm/page.h>
  16 #include <asm/pgtable.h>
  17 #include <asm/system.h>
  18 #include <asm/idprom.h>
  19 #include <asm/oplib.h>
  20 #include <asm/auxio.h>
  21 #include <asm/sbus.h>
  22 #include <asm/irq.h>
  23
  24
  25 /*
  26  * Define this to enable exchanging drive 0 and 1 if only drive 1 is
  27  * probed on PCI machines.
  28  */
  29 #undef PCI_FDC_SWAP_DRIVES
  30
  31
  32 /* References:
  33  * 1) Netbsd Sun floppy driver.
  34  * 2) NCR 82077 controller manual
  35  * 3) Intel 82077 controller manual
  36  */
  37 struct sun_flpy_controller {
  38         volatile unsigned char status1_82077; /* Auxiliary Status reg. 1 */
  39         volatile unsigned char status2_82077; /* Auxiliary Status reg. 2 */
  40         volatile unsigned char dor_82077;     /* Digital Output reg. */
  41         volatile unsigned char tapectl_82077; /* Tape Control reg */
  42         volatile unsigned char status_82077;  /* Main Status Register. */
  43 #define drs_82077              status_82077   /* Digital Rate Select reg. */
  44         volatile unsigned char data_82077;    /* Data fifo. */
  45         volatile unsigned char ___unused;
  46         volatile unsigned char dir_82077;     /* Digital Input reg. */
  47 #define dcr_82077              dir_82077      /* Config Control reg. */
  48 };
  49
  50 /* You'll only ever find one controller on an Ultra anyways. */
  51 static struct sun_flpy_controller *sun_fdc = (struct sun_flpy_controller *)-1;
  52 unsigned long fdc_status;
  53 static struct sbus_dev *floppy_sdev = NULL;
  54
  55 struct sun_floppy_ops {
  56         unsigned char   (*fd_inb) (unsigned long port);
  57         void            (*fd_outb) (unsigned char value, unsigned long port);
  58         void            (*fd_enable_dma) (void);
  59         void            (*fd_disable_dma) (void);
  60         void            (*fd_set_dma_mode) (int);
  61         void            (*fd_set_dma_addr) (char *);
  62         void            (*fd_set_dma_count) (int);
  63         unsigned int    (*get_dma_residue) (void);
  64         int             (*fd_request_irq) (void);
  65         void            (*fd_free_irq) (void);
  66         int             (*fd_eject) (int);
  67 };
  68
  69 static struct sun_floppy_ops sun_fdops;
  70
  71 #define fd_inb(port)              sun_fdops.fd_inb(port)
  72 #define fd_outb(value,port)       sun_fdops.fd_outb(value,port)
  73 #define fd_enable_dma()           sun_fdops.fd_enable_dma()
  74 #define fd_disable_dma()          sun_fdops.fd_disable_dma()
  75 #define fd_request_dma()          (0) /* nothing... */
  76 #define fd_free_dma()             /* nothing... */
  77 #define fd_clear_dma_ff()         /* nothing... */
  78 #define fd_set_dma_mode(mode)     sun_fdops.fd_set_dma_mode(mode)
  79 #define fd_set_dma_addr(addr)     sun_fdops.fd_set_dma_addr(addr)
  80 #define fd_set_dma_count(count)   sun_fdops.fd_set_dma_count(count)
  81 #define get_dma_residue(x)        sun_fdops.get_dma_residue()
  82 #define fd_cacheflush(addr, size) /* nothing... */
  83 #define fd_request_irq()          sun_fdops.fd_request_irq()
  84 #define fd_free_irq()             sun_fdops.fd_free_irq()
  85 #define fd_eject(drive)           sun_fdops.fd_eject(drive)
  86
  87 static int FLOPPY_MOTOR_MASK = 0x10;
  88
  89 /* Super paranoid... */
  90 #undef HAVE_DISABLE_HLT
  91
  92 static int sun_floppy_types[2] = { 0, 0 };
  93
  94 /* Here is where we catch the floppy driver trying to initialize,
  95  * therefore this is where we call the PROM device tree probing
  96  * routine etc. on the Sparc.
  97  */
  98 #define FLOPPY0_TYPE            sun_floppy_init()
  99 #define FLOPPY1_TYPE            sun_floppy_types[1]
 100
 101 #define FDC1                    ((unsigned long)sun_fdc)
 102
 103 #define N_FDC    1
 104 #define N_DRIVE  8
 105
 106 /* No 64k boundary crossing problems on the Sparc. */
 107 #define CROSS_64KB(a,s) (0)
 108
 109 static unsigned char sun_82077_fd_inb(unsigned long port)
 110 {
 111         udelay(5);
 112         switch(port & 7) {
 113         default:
 114                 printk("floppy: Asked to read unknown port %lx\n", port);
 115                 panic("floppy: Port bolixed.");
 116         case 4: /* FD_STATUS */
 117                 return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA;
 118         case 5: /* FD_DATA */
 119                 return sbus_readb(&sun_fdc->data_82077);
 120         case 7: /* FD_DIR */
 121                 /* XXX: Is DCL on 0x80 in sun4m? */
 122                 return sbus_readb(&sun_fdc->dir_82077);
 123         };
 124         panic("sun_82072_fd_inb: How did I get here?");
 125 }
 126
 127 static void sun_82077_fd_outb(unsigned char value, unsigned long port)
 128 {
 129         udelay(5);
 130         switch(port & 7) {
 131         default:
 132                 printk("floppy: Asked to write to unknown port %lx\n", port);
 133                 panic("floppy: Port bolixed.");
 134         case 2: /* FD_DOR */
 135                 /* Happily, the 82077 has a real DOR register. */
 136                 sbus_writeb(value, &sun_fdc->dor_82077);
 137                 break;
 138         case 5: /* FD_DATA */
 139                 sbus_writeb(value, &sun_fdc->data_82077);
 140                 break;
 141         case 7: /* FD_DCR */
 142                 sbus_writeb(value, &sun_fdc->dcr_82077);
 143                 break;
 144         case 4: /* FD_STATUS */
 145                 sbus_writeb(value, &sun_fdc->status_82077);
 146                 break;
 147         };
 148         return;
 149 }
 150
 151 /* For pseudo-dma (Sun floppy drives have no real DMA available to
 152  * them so we must eat the data fifo bytes directly ourselves) we have
 153  * three state variables.  doing_pdma tells our inline low-level
 154  * assembly floppy interrupt entry point whether it should sit and eat
 155  * bytes from the fifo or just transfer control up to the higher level
 156  * floppy interrupt c-code.  I tried very hard but I could not get the
 157  * pseudo-dma to work in c-code without getting many overruns and
 158  * underruns.  If non-zero, doing_pdma encodes the direction of
 159  * the transfer for debugging.  1=read 2=write
 160  */
 161 unsigned char *pdma_vaddr;
 162 unsigned long pdma_size;
 163 volatile int doing_pdma = 0;
 164
 165 /* This is software state */
 166 char *pdma_base = NULL;
 167 unsigned long pdma_areasize;
 168
 169 /* Common routines to all controller types on the Sparc. */
 170 static void sun_fd_disable_dma(void)
 171 {
 172         doing_pdma = 0;
 173         if (pdma_base) {
 174                 mmu_unlockarea(pdma_base, pdma_areasize);
 175                 pdma_base = NULL;
 176         }
 177 }
 178
 179 static void sun_fd_set_dma_mode(int mode)
 180 {
 181         switch(mode) {
 182         case DMA_MODE_READ:
 183                 doing_pdma = 1;
 184                 break;
 185         case DMA_MODE_WRITE:
 186                 doing_pdma = 2;
 187                 break;
 188         default:
 189                 printk("Unknown dma mode %d\n", mode);
 190                 panic("floppy: Giving up...");
 191         }
 192 }
 193
 194 static void sun_fd_set_dma_addr(char *buffer)
 195 {
 196         pdma_vaddr = buffer;
 197 }
 198
 199 static void sun_fd_set_dma_count(int length)
 200 {
 201         pdma_size = length;
 202 }
 203
 204 static void sun_fd_enable_dma(void)
 205 {
 206         pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size);
 207         pdma_base = pdma_vaddr;
 208         pdma_areasize = pdma_size;
 209 }
 210
 211 extern irqreturn_t sparc_floppy_irq(int, void *, struct pt_regs *);
 212
 213 static int sun_fd_request_irq(void)
 214 {
 215         static int once = 0;
 216         int error;
 217
 218         if(!once) {
 219                 once = 1;
 220
 221                 error = request_irq(FLOPPY_IRQ, sparc_floppy_irq,
 222                                     SA_INTERRUPT, "floppy", NULL);
 223
 224                 return ((error == 0) ? 0 : -1);
 225         }
 226         return 0;
 227 }
 228
 229 static void sun_fd_free_irq(void)
 230 {
 231 }
 232
 233 static unsigned int sun_get_dma_residue(void)
 234 {
 235         /* XXX This isn't really correct. XXX */
 236         return 0;
 237 }
 238
 239 static int sun_fd_eject(int drive)
 240 {
 241         set_dor(0x00, 0xff, 0x90);
 242         udelay(500);
 243         set_dor(0x00, 0x6f, 0x00);
 244         udelay(500);
 245         return 0;
 246 }
 247
 248 #ifdef CONFIG_PCI
 249 #include <asm/ebus.h>
 250 #include <asm/isa.h>
 251 #include <asm/ns87303.h>
 252
 253 static struct ebus_dma_info sun_pci_fd_ebus_dma;
 254 static struct pci_dev *sun_pci_ebus_dev;
 255 static int sun_pci_broken_drive = -1;
 256
 257 struct sun_pci_dma_op {
 258         unsigned int    addr;
 259         int             len;
 260         int             direction;
 261         char            *buf;
 262 };
 263 static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL};
 264 static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL};
 265
 266 extern irqreturn_t floppy_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 267
 268 static unsigned char sun_pci_fd_inb(unsigned long port)
 269 {
 270         udelay(5);
 271         return inb(port);
 272 }
 273
 274 static void sun_pci_fd_outb(unsigned char val, unsigned long port)
 275 {
 276         udelay(5);
 277         outb(val, port);
 278 }
 279
 280 static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port)
 281 {
 282         udelay(5);
 283         /*
 284          * XXX: Due to SUN's broken floppy connector on AX and AXi
 285          *      we need to turn on MOTOR_0 also, if the floppy is
 286          *      jumpered to DS1 (like most PC floppies are). I hope
 287          *      this does not hurt correct hardware like the AXmp.
 288          *      (Eddie, Sep 12 1998).
 289          */
 290         if (port == ((unsigned long)sun_fdc) + 2) {
 291                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
 292                         val |= 0x10;
 293                 }
 294         }
 295         outb(val, port);
 296 }
 297
 298 #ifdef PCI_FDC_SWAP_DRIVES
 299 static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port)
 300 {
 301         udelay(5);
 302         /*
 303          * XXX: Due to SUN's broken floppy connector on AX and AXi
 304          *      we need to turn on MOTOR_0 also, if the floppy is
 305          *      jumpered to DS1 (like most PC floppies are). I hope
 306          *      this does not hurt correct hardware like the AXmp.
 307          *      (Eddie, Sep 12 1998).
 308          */
 309         if (port == ((unsigned long)sun_fdc) + 2) {
 310                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
 311                         val &= ~(0x03);
 312                         val |= 0x21;
 313                 }
 314         }
 315         outb(val, port);
 316 }
 317 #endif /* PCI_FDC_SWAP_DRIVES */
 318
 319 static void sun_pci_fd_enable_dma(void)
 320 {
 321         BUG_ON((NULL == sun_pci_dma_pending.buf)        ||
 322             (0    == sun_pci_dma_pending.len)   ||
 323             (0    == sun_pci_dma_pending.direction));
 324
 325         sun_pci_dma_current.buf = sun_pci_dma_pending.buf;
 326         sun_pci_dma_current.len = sun_pci_dma_pending.len;
 327         sun_pci_dma_current.direction = sun_pci_dma_pending.direction;
 328
 329         sun_pci_dma_pending.buf  = NULL;
 330         sun_pci_dma_pending.len  = 0;
 331         sun_pci_dma_pending.direction = 0;
 332         sun_pci_dma_pending.addr = -1U;
 333
 334         sun_pci_dma_current.addr =
 335                 pci_map_single(sun_pci_ebus_dev,
 336                                sun_pci_dma_current.buf,
 337                                sun_pci_dma_current.len,
 338                                sun_pci_dma_current.direction);
 339
 340         ebus_dma_enable(&sun_pci_fd_ebus_dma, 1);
 341
 342         if (ebus_dma_request(&sun_pci_fd_ebus_dma,
 343                              sun_pci_dma_current.addr,
 344                              sun_pci_dma_current.len))
 345                 BUG();
 346 }
 347
 348 static void sun_pci_fd_disable_dma(void)
 349 {
 350         ebus_dma_enable(&sun_pci_fd_ebus_dma, 0);
 351         if (sun_pci_dma_current.addr != -1U)
 352                 pci_unmap_single(sun_pci_ebus_dev,
 353                                  sun_pci_dma_current.addr,
 354                                  sun_pci_dma_current.len,
 355                                  sun_pci_dma_current.direction);
 356         sun_pci_dma_current.addr = -1U;
 357 }
 358
 359 static void sun_pci_fd_set_dma_mode(int mode)
 360 {
 361         if (mode == DMA_MODE_WRITE)
 362                 sun_pci_dma_pending.direction = PCI_DMA_TODEVICE;
 363         else
 364                 sun_pci_dma_pending.direction = PCI_DMA_FROMDEVICE;
 365
 366         ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE);
 367 }
 368
 369 static void sun_pci_fd_set_dma_count(int length)
 370 {
 371         sun_pci_dma_pending.len = length;
 372 }
 373
 374 static void sun_pci_fd_set_dma_addr(char *buffer)
 375 {
 376         sun_pci_dma_pending.buf = buffer;
 377 }
 378
 379 static unsigned int sun_pci_get_dma_residue(void)
 380 {
 381         return ebus_dma_residue(&sun_pci_fd_ebus_dma);
 382 }
 383
 384 static int sun_pci_fd_request_irq(void)
 385 {
 386         return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1);
 387 }
 388
 389 static void sun_pci_fd_free_irq(void)
 390 {
 391         ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0);
 392 }
 393
 394 static int sun_pci_fd_eject(int drive)
 395 {
 396         return -EINVAL;
 397 }
 398
 399 void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie)
 400 {
 401         floppy_interrupt(0, NULL, NULL);
 402 }
 403
 404 /*
 405  * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI,
 406  * even if this is configured using DS1, thus looks like /dev/fd1 with
 407  * the cabling used in Ultras.
 408  */
 409 #define DOR     (port + 2)
 410 #define MSR     (port + 4)
 411 #define FIFO    (port + 5)
 412
 413 static void sun_pci_fd_out_byte(unsigned long port, unsigned char val,
 414                                 unsigned long reg)
 415 {
 416         unsigned char status;
 417         int timeout = 1000;
 418
 419         while (!((status = inb(MSR)) & 0x80) && --timeout)
 420                 udelay(100);
 421         outb(val, reg);
 422 }
 423
 424 static unsigned char sun_pci_fd_sensei(unsigned long port)
 425 {
 426         unsigned char result[2] = { 0x70, 0x00 };
 427         unsigned char status;
 428         int i = 0;
 429
 430         sun_pci_fd_out_byte(port, 0x08, FIFO);
 431         do {
 432                 int timeout = 1000;
 433
 434                 while (!((status = inb(MSR)) & 0x80) && --timeout)
 435                         udelay(100);
 436
 437                 if (!timeout)
 438                         break;
 439
 440                 if ((status & 0xf0) == 0xd0)
 441                         result[i++] = inb(FIFO);
 442                 else
 443                         break;
 444         } while (i < 2);
 445
 446         return result[0];
 447 }
 448
 449 static void sun_pci_fd_reset(unsigned long port)
 450 {
 451         unsigned char mask = 0x00;
 452         unsigned char status;
 453         int timeout = 10000;
 454
 455         outb(0x80, MSR);
 456         do {
 457                 status = sun_pci_fd_sensei(port);
 458                 if ((status & 0xc0) == 0xc0)
 459                         mask |= 1 << (status & 0x03);
 460                 else
 461                         udelay(100);
 462         } while ((mask != 0x0f) && --timeout);
 463 }
 464
 465 static int sun_pci_fd_test_drive(unsigned long port, int drive)
 466 {
 467         unsigned char status, data;
 468         int timeout = 1000;
 469         int ready;
 470
 471         sun_pci_fd_reset(port);
 472
 473         data = (0x10 << drive) | 0x0c | drive;
 474         sun_pci_fd_out_byte(port, data, DOR);
 475
 476         sun_pci_fd_out_byte(port, 0x07, FIFO);
 477         sun_pci_fd_out_byte(port, drive & 0x03, FIFO);
 478
 479         do {
 480                 udelay(100);
 481                 status = sun_pci_fd_sensei(port);
 482         } while (((status & 0xc0) == 0x80) && --timeout);
 483
 484         if (!timeout)
 485                 ready = 0;
 486         else
 487                 ready = (status & 0x10) ? 0 : 1;
 488
 489         sun_pci_fd_reset(port);
 490         return ready;
 491 }
 492 #undef FIFO
 493 #undef MSR
 494 #undef DOR
 495
 496 #endif /* CONFIG_PCI */
 497
 498 #ifdef CONFIG_PCI
 499 static int __init ebus_fdthree_p(struct linux_ebus_device *edev)
 500 {
 501         if (!strcmp(edev->prom_name, "fdthree"))
 502                 return 1;
 503         if (!strcmp(edev->prom_name, "floppy")) {
 504                 char compat[16];
 505                 prom_getstring(edev->prom_node,
 506                                "compatible",
 507                                compat, sizeof(compat));
 508                 compat[15] = '\0';
 509                 if (!strcmp(compat, "fdthree"))
 510                         return 1;
 511         }
 512         return 0;
 513 }
 514 #endif
 515
 516 #ifdef CONFIG_PCI
 517 #undef ISA_FLOPPY_WORKS
 518
 519 #ifdef ISA_FLOPPY_WORKS
 520 static unsigned long __init isa_floppy_init(void)
 521 {
 522         struct sparc_isa_bridge *isa_br;
 523         struct sparc_isa_device *isa_dev = NULL;
 524
 525         for_each_isa(isa_br) {
 526                 for_each_isadev(isa_dev, isa_br) {
 527                         if (!strcmp(isa_dev->prom_name, "dma")) {
 528                                 struct sparc_isa_device *child =
 529                                         isa_dev->child;
 530
 531                                 while (child) {
 532                                         if (!strcmp(child->prom_name,
 533                                                     "floppy")) {
 534                                                 isa_dev = child;
 535                                                 goto isa_done;
 536                                         }
 537                                         child = child->next;
 538                                 }
 539                         }
 540                 }
 541         }
 542 isa_done:
 543         if (!isa_dev)
 544                 return 0;
 545
 546         /* We could use DMA on devices behind the ISA bridge, but...
 547          *
 548          * There is a slight problem.  Normally on x86 kit the x86 processor
 549          * delays I/O port instructions when the ISA bus "dma in progress"
 550          * signal is active.  Well, sparc64 systems do not monitor this
 551          * signal thus we would need to block all I/O port accesses in software
 552          * when a dma transfer is active for some device.
 553          */
 554
 555         sun_fdc = (struct sun_flpy_controller *)isa_dev->resource.start;
 556         FLOPPY_IRQ = isa_dev->irq;
 557
 558         sun_fdops.fd_inb = sun_pci_fd_inb;
 559         sun_fdops.fd_outb = sun_pci_fd_outb;
 560
 561         can_use_virtual_dma = use_virtual_dma = 1;
 562         sun_fdops.fd_enable_dma = sun_fd_enable_dma;
 563         sun_fdops.fd_disable_dma = sun_fd_disable_dma;
 564         sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
 565         sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
 566         sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
 567         sun_fdops.get_dma_residue = sun_get_dma_residue;
 568
 569         sun_fdops.fd_request_irq = sun_fd_request_irq;
 570         sun_fdops.fd_free_irq = sun_fd_free_irq;
 571
 572         /* Floppy eject is manual.   Actually, could determine this
 573          * via presence of 'manual' property in OBP node.
 574          */
 575         sun_fdops.fd_eject = sun_pci_fd_eject;
 576
 577         fdc_status = (unsigned long) &sun_fdc->status_82077;
 578         FLOPPY_MOTOR_MASK = 0xf0;
 579
 580         allowed_drive_mask = 0;
 581         sun_floppy_types[0] = 0;
 582         sun_floppy_types[1] = 4;
 583
 584         sun_pci_broken_drive = 1;
 585         sun_fdops.fd_outb = sun_pci_fd_broken_outb;
 586
 587         return sun_floppy_types[0];
 588 }
 589 #endif /* ISA_FLOPPY_WORKS */
 590
 591 #endif
 592
 593 static unsigned long __init sun_floppy_init(void)
 594 {
 595         char state[128];
 596         struct sbus_bus *bus;
 597         struct sbus_dev *sdev = NULL;
 598         static int initialized = 0;
 599
 600         if (initialized)
 601                 return sun_floppy_types[0];
 602         initialized = 1;
 603
 604         for_all_sbusdev (sdev, bus) {
 605                 if (!strcmp(sdev->prom_name, "SUNW,fdtwo"))
 606                         break;
 607         }
 608         if(sdev) {
 609                 floppy_sdev = sdev;
 610                 FLOPPY_IRQ = sdev->irqs[0];
 611         } else {
 612 #ifdef CONFIG_PCI
 613                 struct linux_ebus *ebus;
 614                 struct linux_ebus_device *edev = NULL;
 615                 unsigned long config = 0;
 616                 void __iomem *auxio_reg;
 617
 618                 for_each_ebus(ebus) {
 619                         for_each_ebusdev(edev, ebus) {
 620                                 if (ebus_fdthree_p(edev))
 621                                         goto ebus_done;
 622                         }
 623                 }
 624         ebus_done:
 625                 if (!edev) {
 626 #ifdef ISA_FLOPPY_WORKS
 627                         return isa_floppy_init();
 628 #else
 629                         return 0;
 630 #endif
 631                 }
 632
 633                 prom_getproperty(edev->prom_node, "status",
 634                                  state, sizeof(state));
 635                 if (!strncmp(state, "disabled", 8))
 636                         return 0;
 637
 638                 FLOPPY_IRQ = edev->irqs[0];
 639
 640                 /* Make sure the high density bit is set, some systems
 641                  * (most notably Ultra5/Ultra10) come up with it clear.
 642                  */
 643                 auxio_reg = (void __iomem *) edev->resource[2].start;
 644                 writel(readl(auxio_reg)|0x2, auxio_reg);
 645
 646                 sun_pci_ebus_dev = ebus->self;
 647
 648                 spin_lock_init(&sun_pci_fd_ebus_dma.lock);
 649
 650                 /* XXX ioremap */
 651                 sun_pci_fd_ebus_dma.regs = (void __iomem *)
 652                         edev->resource[1].start;
 653                 if (!sun_pci_fd_ebus_dma.regs)
 654                         return 0;
 655
 656                 sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER |
 657                                              EBUS_DMA_FLAG_TCI_DISABLE);
 658                 sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback;
 659                 sun_pci_fd_ebus_dma.client_cookie = NULL;
 660                 sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ;
 661                 strcpy(sun_pci_fd_ebus_dma.name, "floppy");
 662                 if (ebus_dma_register(&sun_pci_fd_ebus_dma))
 663                         return 0;
 664
 665                 /* XXX ioremap */
 666                 sun_fdc = (struct sun_flpy_controller *)edev->resource[0].start;
 667
 668                 sun_fdops.fd_inb = sun_pci_fd_inb;
 669                 sun_fdops.fd_outb = sun_pci_fd_outb;
 670
 671                 can_use_virtual_dma = use_virtual_dma = 0;
 672                 sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma;
 673                 sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma;
 674                 sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode;
 675                 sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr;
 676                 sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count;
 677                 sun_fdops.get_dma_residue = sun_pci_get_dma_residue;
 678
 679                 sun_fdops.fd_request_irq = sun_pci_fd_request_irq;
 680                 sun_fdops.fd_free_irq = sun_pci_fd_free_irq;
 681
 682                 sun_fdops.fd_eject = sun_pci_fd_eject;
 683
 684                 fdc_status = (unsigned long) &sun_fdc->status_82077;
 685                 FLOPPY_MOTOR_MASK = 0xf0;
 686
 687                 /*
 688                  * XXX: Find out on which machines this is really needed.
 689                  */
 690                 if (1) {
 691                         sun_pci_broken_drive = 1;
 692                         sun_fdops.fd_outb = sun_pci_fd_broken_outb;
 693                 }
 694
 695                 allowed_drive_mask = 0;
 696                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0))
 697                         sun_floppy_types[0] = 4;
 698                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1))
 699                         sun_floppy_types[1] = 4;
 700
 701                 /*
 702                  * Find NS87303 SuperIO config registers (through ecpp).
 703                  */
 704                 for_each_ebus(ebus) {
 705                         for_each_ebusdev(edev, ebus) {
 706                                 if (!strcmp(edev->prom_name, "ecpp")) {
 707                                         config = edev->resource[1].start;
 708                                         goto config_done;
 709                                 }
 710                         }
 711                 }
 712         config_done:
 713
 714                 /*
 715                  * Sanity check, is this really the NS87303?
 716                  */
 717                 switch (config & 0x3ff) {
 718                 case 0x02e:
 719                 case 0x15c:
 720                 case 0x26e:
 721                 case 0x398:
 722                         break;
 723                 default:
 724                         config = 0;
 725                 }
 726
 727                 if (!config)
 728                         return sun_floppy_types[0];
 729
 730                 /* Enable PC-AT mode. */
 731                 ns87303_modify(config, ASC, 0, 0xc0);
 732
 733 #ifdef PCI_FDC_SWAP_DRIVES
 734                 /*
 735                  * If only Floppy 1 is present, swap drives.
 736                  */
 737                 if (!sun_floppy_types[0] && sun_floppy_types[1]) {
 738                         /*
 739                          * Set the drive exchange bit in FCR on NS87303,
 740                          * make sure other bits are sane before doing so.
 741                          */
 742                         ns87303_modify(config, FER, FER_EDM, 0);
 743                         ns87303_modify(config, ASC, ASC_DRV2_SEL, 0);
 744                         ns87303_modify(config, FCR, 0, FCR_LDE);
 745
 746                         config = sun_floppy_types[0];
 747                         sun_floppy_types[0] = sun_floppy_types[1];
 748                         sun_floppy_types[1] = config;
 749
 750                         if (sun_pci_broken_drive != -1) {
 751                                 sun_pci_broken_drive = 1 - sun_pci_broken_drive;
 752                                 sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb;
 753                         }
 754                 }
 755 #endif /* PCI_FDC_SWAP_DRIVES */
 756
 757                 return sun_floppy_types[0];
 758 #else
 759                 return 0;
 760 #endif
 761         }
 762         prom_getproperty(sdev->prom_node, "status", state, sizeof(state));
 763         if(!strncmp(state, "disabled", 8))
 764                 return 0;
 765
 766         /*
 767          * We cannot do sbus_ioremap here: it does request_region,
 768          * which the generic floppy driver tries to do once again.
 769          * But we must use the sdev resource values as they have
 770          * had parent ranges applied.
 771          */
 772         sun_fdc = (struct sun_flpy_controller *)
 773                 (sdev->resource[0].start +
 774                  ((sdev->resource[0].flags & 0x1ffUL) << 32UL));
 775
 776         /* Last minute sanity check... */
 777         if(sbus_readb(&sun_fdc->status1_82077) == 0xff) {
 778                 sun_fdc = (struct sun_flpy_controller *)-1;
 779                 return 0;
 780         }
 781
 782         sun_fdops.fd_inb = sun_82077_fd_inb;
 783         sun_fdops.fd_outb = sun_82077_fd_outb;
 784
 785         can_use_virtual_dma = use_virtual_dma = 1;
 786         sun_fdops.fd_enable_dma = sun_fd_enable_dma;
 787         sun_fdops.fd_disable_dma = sun_fd_disable_dma;
 788         sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
 789         sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
 790         sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
 791         sun_fdops.get_dma_residue = sun_get_dma_residue;
 792
 793         sun_fdops.fd_request_irq = sun_fd_request_irq;
 794         sun_fdops.fd_free_irq = sun_fd_free_irq;
 795
 796         sun_fdops.fd_eject = sun_fd_eject;
 797
 798         fdc_status = (unsigned long) &sun_fdc->status_82077;
 799
 800         /* Success... */
 801         allowed_drive_mask = 0x01;
 802         sun_floppy_types[0] = 4;
 803         sun_floppy_types[1] = 0;
 804
 805         return sun_floppy_types[0];
 806 }
 807
 808 #define EXTRA_FLOPPY_PARAMS
 809
 810 #endif /* !(__ASM_SPARC64_FLOPPY_H) */