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   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 irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie)
 212 {
 213         if (likely(doing_pdma)) {
 214                 void __iomem *stat = (void __iomem *) fdc_status;
 215                 unsigned char *vaddr = pdma_vaddr;
 216                 unsigned long size = pdma_size;
 217                 u8 val;
 218
 219                 while (size) {
 220                         val = readb(stat);
 221                         if (unlikely(!(val & 0x80))) {
 222                                 pdma_vaddr = vaddr;
 223                                 pdma_size = size;
 224                                 return IRQ_HANDLED;
 225                         }
 226                         if (unlikely(!(val & 0x20))) {
 227                                 pdma_vaddr = vaddr;
 228                                 pdma_size = size;
 229                                 doing_pdma = 0;
 230                                 goto main_interrupt;
 231                         }
 232                         if (val & 0x40) {
 233                                 /* read */
 234                                 *vaddr++ = readb(stat + 1);
 235                         } else {
 236                                 unsigned char data = *vaddr++;
 237
 238                                 /* write */
 239                                 writeb(data, stat + 1);
 240                         }
 241                         size--;
 242                 }
 243
 244                 pdma_vaddr = vaddr;
 245                 pdma_size = size;
 246
 247                 /* Send Terminal Count pulse to floppy controller. */
 248                 val = readb(auxio_register);
 249                 val |= AUXIO_AUX1_FTCNT;
 250                 writeb(val, auxio_register);
 251                 val &= ~AUXIO_AUX1_FTCNT;
 252                 writeb(val, auxio_register);
 253
 254                 doing_pdma = 0;
 255         }
 256
 257 main_interrupt:
 258         return floppy_interrupt(irq, dev_cookie);
 259 }
 260
 261 static int sun_fd_request_irq(void)
 262 {
 263         static int once = 0;
 264         int error;
 265
 266         if(!once) {
 267                 once = 1;
 268
 269                 error = request_irq(FLOPPY_IRQ, sparc_floppy_irq,
 270                                     IRQF_DISABLED, "floppy", NULL);
 271
 272                 return ((error == 0) ? 0 : -1);
 273         }
 274         return 0;
 275 }
 276
 277 static void sun_fd_free_irq(void)
 278 {
 279 }
 280
 281 static unsigned int sun_get_dma_residue(void)
 282 {
 283         /* XXX This isn't really correct. XXX */
 284         return 0;
 285 }
 286
 287 static int sun_fd_eject(int drive)
 288 {
 289         set_dor(0x00, 0xff, 0x90);
 290         udelay(500);
 291         set_dor(0x00, 0x6f, 0x00);
 292         udelay(500);
 293         return 0;
 294 }
 295
 296 #ifdef CONFIG_PCI
 297 #include <asm/ebus.h>
 298 #include <asm/isa.h>
 299 #include <asm/ns87303.h>
 300
 301 static struct ebus_dma_info sun_pci_fd_ebus_dma;
 302 static struct pci_dev *sun_pci_ebus_dev;
 303 static int sun_pci_broken_drive = -1;
 304
 305 struct sun_pci_dma_op {
 306         unsigned int    addr;
 307         int             len;
 308         int             direction;
 309         char            *buf;
 310 };
 311 static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL};
 312 static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL};
 313
 314 extern irqreturn_t floppy_interrupt(int irq, void *dev_id);
 315
 316 static unsigned char sun_pci_fd_inb(unsigned long port)
 317 {
 318         udelay(5);
 319         return inb(port);
 320 }
 321
 322 static void sun_pci_fd_outb(unsigned char val, unsigned long port)
 323 {
 324         udelay(5);
 325         outb(val, port);
 326 }
 327
 328 static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port)
 329 {
 330         udelay(5);
 331         /*
 332          * XXX: Due to SUN's broken floppy connector on AX and AXi
 333          *      we need to turn on MOTOR_0 also, if the floppy is
 334          *      jumpered to DS1 (like most PC floppies are). I hope
 335          *      this does not hurt correct hardware like the AXmp.
 336          *      (Eddie, Sep 12 1998).
 337          */
 338         if (port == ((unsigned long)sun_fdc) + 2) {
 339                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
 340                         val |= 0x10;
 341                 }
 342         }
 343         outb(val, port);
 344 }
 345
 346 #ifdef PCI_FDC_SWAP_DRIVES
 347 static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port)
 348 {
 349         udelay(5);
 350         /*
 351          * XXX: Due to SUN's broken floppy connector on AX and AXi
 352          *      we need to turn on MOTOR_0 also, if the floppy is
 353          *      jumpered to DS1 (like most PC floppies are). I hope
 354          *      this does not hurt correct hardware like the AXmp.
 355          *      (Eddie, Sep 12 1998).
 356          */
 357         if (port == ((unsigned long)sun_fdc) + 2) {
 358                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
 359                         val &= ~(0x03);
 360                         val |= 0x21;
 361                 }
 362         }
 363         outb(val, port);
 364 }
 365 #endif /* PCI_FDC_SWAP_DRIVES */
 366
 367 static void sun_pci_fd_enable_dma(void)
 368 {
 369         BUG_ON((NULL == sun_pci_dma_pending.buf)        ||
 370             (0    == sun_pci_dma_pending.len)   ||
 371             (0    == sun_pci_dma_pending.direction));
 372
 373         sun_pci_dma_current.buf = sun_pci_dma_pending.buf;
 374         sun_pci_dma_current.len = sun_pci_dma_pending.len;
 375         sun_pci_dma_current.direction = sun_pci_dma_pending.direction;
 376
 377         sun_pci_dma_pending.buf  = NULL;
 378         sun_pci_dma_pending.len  = 0;
 379         sun_pci_dma_pending.direction = 0;
 380         sun_pci_dma_pending.addr = -1U;
 381
 382         sun_pci_dma_current.addr =
 383                 pci_map_single(sun_pci_ebus_dev,
 384                                sun_pci_dma_current.buf,
 385                                sun_pci_dma_current.len,
 386                                sun_pci_dma_current.direction);
 387
 388         ebus_dma_enable(&sun_pci_fd_ebus_dma, 1);
 389
 390         if (ebus_dma_request(&sun_pci_fd_ebus_dma,
 391                              sun_pci_dma_current.addr,
 392                              sun_pci_dma_current.len))
 393                 BUG();
 394 }
 395
 396 static void sun_pci_fd_disable_dma(void)
 397 {
 398         ebus_dma_enable(&sun_pci_fd_ebus_dma, 0);
 399         if (sun_pci_dma_current.addr != -1U)
 400                 pci_unmap_single(sun_pci_ebus_dev,
 401                                  sun_pci_dma_current.addr,
 402                                  sun_pci_dma_current.len,
 403                                  sun_pci_dma_current.direction);
 404         sun_pci_dma_current.addr = -1U;
 405 }
 406
 407 static void sun_pci_fd_set_dma_mode(int mode)
 408 {
 409         if (mode == DMA_MODE_WRITE)
 410                 sun_pci_dma_pending.direction = PCI_DMA_TODEVICE;
 411         else
 412                 sun_pci_dma_pending.direction = PCI_DMA_FROMDEVICE;
 413
 414         ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE);
 415 }
 416
 417 static void sun_pci_fd_set_dma_count(int length)
 418 {
 419         sun_pci_dma_pending.len = length;
 420 }
 421
 422 static void sun_pci_fd_set_dma_addr(char *buffer)
 423 {
 424         sun_pci_dma_pending.buf = buffer;
 425 }
 426
 427 static unsigned int sun_pci_get_dma_residue(void)
 428 {
 429         return ebus_dma_residue(&sun_pci_fd_ebus_dma);
 430 }
 431
 432 static int sun_pci_fd_request_irq(void)
 433 {
 434         return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1);
 435 }
 436
 437 static void sun_pci_fd_free_irq(void)
 438 {
 439         ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0);
 440 }
 441
 442 static int sun_pci_fd_eject(int drive)
 443 {
 444         return -EINVAL;
 445 }
 446
 447 void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie)
 448 {
 449         floppy_interrupt(0, NULL);
 450 }
 451
 452 /*
 453  * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI,
 454  * even if this is configured using DS1, thus looks like /dev/fd1 with
 455  * the cabling used in Ultras.
 456  */
 457 #define DOR     (port + 2)
 458 #define MSR     (port + 4)
 459 #define FIFO    (port + 5)
 460
 461 static void sun_pci_fd_out_byte(unsigned long port, unsigned char val,
 462                                 unsigned long reg)
 463 {
 464         unsigned char status;
 465         int timeout = 1000;
 466
 467         while (!((status = inb(MSR)) & 0x80) && --timeout)
 468                 udelay(100);
 469         outb(val, reg);
 470 }
 471
 472 static unsigned char sun_pci_fd_sensei(unsigned long port)
 473 {
 474         unsigned char result[2] = { 0x70, 0x00 };
 475         unsigned char status;
 476         int i = 0;
 477
 478         sun_pci_fd_out_byte(port, 0x08, FIFO);
 479         do {
 480                 int timeout = 1000;
 481
 482                 while (!((status = inb(MSR)) & 0x80) && --timeout)
 483                         udelay(100);
 484
 485                 if (!timeout)
 486                         break;
 487
 488                 if ((status & 0xf0) == 0xd0)
 489                         result[i++] = inb(FIFO);
 490                 else
 491                         break;
 492         } while (i < 2);
 493
 494         return result[0];
 495 }
 496
 497 static void sun_pci_fd_reset(unsigned long port)
 498 {
 499         unsigned char mask = 0x00;
 500         unsigned char status;
 501         int timeout = 10000;
 502
 503         outb(0x80, MSR);
 504         do {
 505                 status = sun_pci_fd_sensei(port);
 506                 if ((status & 0xc0) == 0xc0)
 507                         mask |= 1 << (status & 0x03);
 508                 else
 509                         udelay(100);
 510         } while ((mask != 0x0f) && --timeout);
 511 }
 512
 513 static int sun_pci_fd_test_drive(unsigned long port, int drive)
 514 {
 515         unsigned char status, data;
 516         int timeout = 1000;
 517         int ready;
 518
 519         sun_pci_fd_reset(port);
 520
 521         data = (0x10 << drive) | 0x0c | drive;
 522         sun_pci_fd_out_byte(port, data, DOR);
 523
 524         sun_pci_fd_out_byte(port, 0x07, FIFO);
 525         sun_pci_fd_out_byte(port, drive & 0x03, FIFO);
 526
 527         do {
 528                 udelay(100);
 529                 status = sun_pci_fd_sensei(port);
 530         } while (((status & 0xc0) == 0x80) && --timeout);
 531
 532         if (!timeout)
 533                 ready = 0;
 534         else
 535                 ready = (status & 0x10) ? 0 : 1;
 536
 537         sun_pci_fd_reset(port);
 538         return ready;
 539 }
 540 #undef FIFO
 541 #undef MSR
 542 #undef DOR
 543
 544 #endif /* CONFIG_PCI */
 545
 546 #ifdef CONFIG_PCI
 547 static int __init ebus_fdthree_p(struct linux_ebus_device *edev)
 548 {
 549         if (!strcmp(edev->prom_node->name, "fdthree"))
 550                 return 1;
 551         if (!strcmp(edev->prom_node->name, "floppy")) {
 552                 char *compat;
 553
 554                 compat = of_get_property(edev->prom_node,
 555                                          "compatible", NULL);
 556                 if (compat && !strcmp(compat, "fdthree"))
 557                         return 1;
 558         }
 559         return 0;
 560 }
 561 #endif
 562
 563 #ifdef CONFIG_PCI
 564 #undef ISA_FLOPPY_WORKS
 565
 566 #ifdef ISA_FLOPPY_WORKS
 567 static unsigned long __init isa_floppy_init(void)
 568 {
 569         struct sparc_isa_bridge *isa_br;
 570         struct sparc_isa_device *isa_dev = NULL;
 571
 572         for_each_isa(isa_br) {
 573                 for_each_isadev(isa_dev, isa_br) {
 574                         if (!strcmp(isa_dev->prom_node->name, "dma")) {
 575                                 struct sparc_isa_device *child =
 576                                         isa_dev->child;
 577
 578                                 while (child) {
 579                                         if (!strcmp(child->prom_node->name,
 580                                                     "floppy")) {
 581                                                 isa_dev = child;
 582                                                 goto isa_done;
 583                                         }
 584                                         child = child->next;
 585                                 }
 586                         }
 587                 }
 588         }
 589 isa_done:
 590         if (!isa_dev)
 591                 return 0;
 592
 593         /* We could use DMA on devices behind the ISA bridge, but...
 594          *
 595          * There is a slight problem.  Normally on x86 kit the x86 processor
 596          * delays I/O port instructions when the ISA bus "dma in progress"
 597          * signal is active.  Well, sparc64 systems do not monitor this
 598          * signal thus we would need to block all I/O port accesses in software
 599          * when a dma transfer is active for some device.
 600          */
 601
 602         sun_fdc = (struct sun_flpy_controller *)isa_dev->resource.start;
 603         FLOPPY_IRQ = isa_dev->irq;
 604
 605         sun_fdops.fd_inb = sun_pci_fd_inb;
 606         sun_fdops.fd_outb = sun_pci_fd_outb;
 607
 608         can_use_virtual_dma = use_virtual_dma = 1;
 609         sun_fdops.fd_enable_dma = sun_fd_enable_dma;
 610         sun_fdops.fd_disable_dma = sun_fd_disable_dma;
 611         sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
 612         sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
 613         sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
 614         sun_fdops.get_dma_residue = sun_get_dma_residue;
 615
 616         sun_fdops.fd_request_irq = sun_fd_request_irq;
 617         sun_fdops.fd_free_irq = sun_fd_free_irq;
 618
 619         /* Floppy eject is manual.   Actually, could determine this
 620          * via presence of 'manual' property in OBP node.
 621          */
 622         sun_fdops.fd_eject = sun_pci_fd_eject;
 623
 624         fdc_status = (unsigned long) &sun_fdc->status_82077;
 625         FLOPPY_MOTOR_MASK = 0xf0;
 626
 627         allowed_drive_mask = 0;
 628         sun_floppy_types[0] = 0;
 629         sun_floppy_types[1] = 4;
 630
 631         sun_pci_broken_drive = 1;
 632         sun_fdops.fd_outb = sun_pci_fd_broken_outb;
 633
 634         return sun_floppy_types[0];
 635 }
 636 #endif /* ISA_FLOPPY_WORKS */
 637
 638 #endif
 639
 640 static unsigned long __init sun_floppy_init(void)
 641 {
 642         char state[128];
 643         struct sbus_bus *bus;
 644         struct sbus_dev *sdev = NULL;
 645         static int initialized = 0;
 646
 647         if (initialized)
 648                 return sun_floppy_types[0];
 649         initialized = 1;
 650
 651         for_all_sbusdev (sdev, bus) {
 652                 if (!strcmp(sdev->prom_name, "SUNW,fdtwo"))
 653                         break;
 654         }
 655         if(sdev) {
 656                 floppy_sdev = sdev;
 657                 FLOPPY_IRQ = sdev->irqs[0];
 658         } else {
 659 #ifdef CONFIG_PCI
 660                 struct linux_ebus *ebus;
 661                 struct linux_ebus_device *edev = NULL;
 662                 unsigned long config = 0;
 663                 void __iomem *auxio_reg;
 664                 char *state_prop;
 665
 666                 for_each_ebus(ebus) {
 667                         for_each_ebusdev(edev, ebus) {
 668                                 if (ebus_fdthree_p(edev))
 669                                         goto ebus_done;
 670                         }
 671                 }
 672         ebus_done:
 673                 if (!edev) {
 674 #ifdef ISA_FLOPPY_WORKS
 675                         return isa_floppy_init();
 676 #else
 677                         return 0;
 678 #endif
 679                 }
 680
 681                 state_prop = of_get_property(edev->prom_node, "status", NULL);
 682                 if (state_prop && !strncmp(state_prop, "disabled", 8))
 683                         return 0;
 684
 685                 FLOPPY_IRQ = edev->irqs[0];
 686
 687                 /* Make sure the high density bit is set, some systems
 688                  * (most notably Ultra5/Ultra10) come up with it clear.
 689                  */
 690                 auxio_reg = (void __iomem *) edev->resource[2].start;
 691                 writel(readl(auxio_reg)|0x2, auxio_reg);
 692
 693                 sun_pci_ebus_dev = ebus->self;
 694
 695                 spin_lock_init(&sun_pci_fd_ebus_dma.lock);
 696
 697                 /* XXX ioremap */
 698                 sun_pci_fd_ebus_dma.regs = (void __iomem *)
 699                         edev->resource[1].start;
 700                 if (!sun_pci_fd_ebus_dma.regs)
 701                         return 0;
 702
 703                 sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER |
 704                                              EBUS_DMA_FLAG_TCI_DISABLE);
 705                 sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback;
 706                 sun_pci_fd_ebus_dma.client_cookie = NULL;
 707                 sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ;
 708                 strcpy(sun_pci_fd_ebus_dma.name, "floppy");
 709                 if (ebus_dma_register(&sun_pci_fd_ebus_dma))
 710                         return 0;
 711
 712                 /* XXX ioremap */
 713                 sun_fdc = (struct sun_flpy_controller *)edev->resource[0].start;
 714
 715                 sun_fdops.fd_inb = sun_pci_fd_inb;
 716                 sun_fdops.fd_outb = sun_pci_fd_outb;
 717
 718                 can_use_virtual_dma = use_virtual_dma = 0;
 719                 sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma;
 720                 sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma;
 721                 sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode;
 722                 sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr;
 723                 sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count;
 724                 sun_fdops.get_dma_residue = sun_pci_get_dma_residue;
 725
 726                 sun_fdops.fd_request_irq = sun_pci_fd_request_irq;
 727                 sun_fdops.fd_free_irq = sun_pci_fd_free_irq;
 728
 729                 sun_fdops.fd_eject = sun_pci_fd_eject;
 730
 731                 fdc_status = (unsigned long) &sun_fdc->status_82077;
 732                 FLOPPY_MOTOR_MASK = 0xf0;
 733
 734                 /*
 735                  * XXX: Find out on which machines this is really needed.
 736                  */
 737                 if (1) {
 738                         sun_pci_broken_drive = 1;
 739                         sun_fdops.fd_outb = sun_pci_fd_broken_outb;
 740                 }
 741
 742                 allowed_drive_mask = 0;
 743                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0))
 744                         sun_floppy_types[0] = 4;
 745                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1))
 746                         sun_floppy_types[1] = 4;
 747
 748                 /*
 749                  * Find NS87303 SuperIO config registers (through ecpp).
 750                  */
 751                 for_each_ebus(ebus) {
 752                         for_each_ebusdev(edev, ebus) {
 753                                 if (!strcmp(edev->prom_node->name, "ecpp")) {
 754                                         config = edev->resource[1].start;
 755                                         goto config_done;
 756                                 }
 757                         }
 758                 }
 759         config_done:
 760
 761                 /*
 762                  * Sanity check, is this really the NS87303?
 763                  */
 764                 switch (config & 0x3ff) {
 765                 case 0x02e:
 766                 case 0x15c:
 767                 case 0x26e:
 768                 case 0x398:
 769                         break;
 770                 default:
 771                         config = 0;
 772                 }
 773
 774                 if (!config)
 775                         return sun_floppy_types[0];
 776
 777                 /* Enable PC-AT mode. */
 778                 ns87303_modify(config, ASC, 0, 0xc0);
 779
 780 #ifdef PCI_FDC_SWAP_DRIVES
 781                 /*
 782                  * If only Floppy 1 is present, swap drives.
 783                  */
 784                 if (!sun_floppy_types[0] && sun_floppy_types[1]) {
 785                         /*
 786                          * Set the drive exchange bit in FCR on NS87303,
 787                          * make sure other bits are sane before doing so.
 788                          */
 789                         ns87303_modify(config, FER, FER_EDM, 0);
 790                         ns87303_modify(config, ASC, ASC_DRV2_SEL, 0);
 791                         ns87303_modify(config, FCR, 0, FCR_LDE);
 792
 793                         config = sun_floppy_types[0];
 794                         sun_floppy_types[0] = sun_floppy_types[1];
 795                         sun_floppy_types[1] = config;
 796
 797                         if (sun_pci_broken_drive != -1) {
 798                                 sun_pci_broken_drive = 1 - sun_pci_broken_drive;
 799                                 sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb;
 800                         }
 801                 }
 802 #endif /* PCI_FDC_SWAP_DRIVES */
 803
 804                 return sun_floppy_types[0];
 805 #else
 806                 return 0;
 807 #endif
 808         }
 809         prom_getproperty(sdev->prom_node, "status", state, sizeof(state));
 810         if(!strncmp(state, "disabled", 8))
 811                 return 0;
 812
 813         /*
 814          * We cannot do sbus_ioremap here: it does request_region,
 815          * which the generic floppy driver tries to do once again.
 816          * But we must use the sdev resource values as they have
 817          * had parent ranges applied.
 818          */
 819         sun_fdc = (struct sun_flpy_controller *)
 820                 (sdev->resource[0].start +
 821                  ((sdev->resource[0].flags & 0x1ffUL) << 32UL));
 822
 823         /* Last minute sanity check... */
 824         if(sbus_readb(&sun_fdc->status1_82077) == 0xff) {
 825                 sun_fdc = (struct sun_flpy_controller *)-1;
 826                 return 0;
 827         }
 828
 829         sun_fdops.fd_inb = sun_82077_fd_inb;
 830         sun_fdops.fd_outb = sun_82077_fd_outb;
 831
 832         can_use_virtual_dma = use_virtual_dma = 1;
 833         sun_fdops.fd_enable_dma = sun_fd_enable_dma;
 834         sun_fdops.fd_disable_dma = sun_fd_disable_dma;
 835         sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
 836         sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
 837         sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
 838         sun_fdops.get_dma_residue = sun_get_dma_residue;
 839
 840         sun_fdops.fd_request_irq = sun_fd_request_irq;
 841         sun_fdops.fd_free_irq = sun_fd_free_irq;
 842
 843         sun_fdops.fd_eject = sun_fd_eject;
 844
 845         fdc_status = (unsigned long) &sun_fdc->status_82077;
 846
 847         /* Success... */
 848         allowed_drive_mask = 0x01;
 849         sun_floppy_types[0] = 4;
 850         sun_floppy_types[1] = 0;
 851
 852         return sun_floppy_types[0];
 853 }
 854
 855 #define EXTRA_FLOPPY_PARAMS
 856
 857 #endif /* !(__ASM_SPARC64_FLOPPY_H) */