include/asm-sparc64/floppy.h

   1 /* $Id: floppy.h,v 1.28 2000/02/18 13:50:54 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/config.h>
  14 #include <linux/init.h>
  15
  16 #include <asm/page.h>
  17 #include <asm/pgtable.h>
  18 #include <asm/system.h>
  19 #include <asm/idprom.h>
  20 #include <asm/oplib.h>
  21 #include <asm/auxio.h>
  22 #include <asm/sbus.h>
  23 #include <asm/irq.h>
  24
  25
  26 /*
  27  * Define this to enable exchanging drive 0 and 1 if only drive 1 is
  28  * probed on PCI machines.
  29  */
  30 #undef PCI_FDC_SWAP_DRIVES
  31
  32
  33 /* References:
  34  * 1) Netbsd Sun floppy driver.
  35  * 2) NCR 82077 controller manual
  36  * 3) Intel 82077 controller manual
  37  */
  38 struct sun_flpy_controller {
  39         volatile unsigned char status1_82077; /* Auxiliary Status reg. 1 */
  40         volatile unsigned char status2_82077; /* Auxiliary Status reg. 2 */
  41         volatile unsigned char dor_82077;     /* Digital Output reg. */
  42         volatile unsigned char tapectl_82077; /* Tape Control reg */
  43         volatile unsigned char status_82077;  /* Main Status Register. */
  44 #define drs_82077              status_82077   /* Digital Rate Select reg. */
  45         volatile unsigned char data_82077;    /* Data fifo. */
  46         volatile unsigned char ___unused;
  47         volatile unsigned char dir_82077;     /* Digital Input reg. */
  48 #define dcr_82077              dir_82077      /* Config Control reg. */
  49 };
  50
  51 /* You'll only ever find one controller on an Ultra anyways. */
  52 static struct sun_flpy_controller *sun_fdc = (struct sun_flpy_controller *)-1;
  53 unsigned long fdc_status;
  54 static struct sbus_dev *floppy_sdev = NULL;
  55
  56 struct sun_floppy_ops {
  57         unsigned char   (*fd_inb) (unsigned long port);
  58         void            (*fd_outb) (unsigned char value, unsigned long port);
  59         void            (*fd_enable_dma) (void);
  60         void            (*fd_disable_dma) (void);
  61         void            (*fd_set_dma_mode) (int);
  62         void            (*fd_set_dma_addr) (char *);
  63         void            (*fd_set_dma_count) (int);
  64         unsigned int    (*get_dma_residue) (void);
  65         void            (*fd_enable_irq) (void);
  66         void            (*fd_disable_irq) (void);
  67         int             (*fd_request_irq) (void);
  68         void            (*fd_free_irq) (void);
  69         int             (*fd_eject) (int);
  70 };
  71
  72 static struct sun_floppy_ops sun_fdops;
  73
  74 #define fd_inb(port)              sun_fdops.fd_inb(port)
  75 #define fd_outb(value,port)       sun_fdops.fd_outb(value,port)
  76 #define fd_enable_dma()           sun_fdops.fd_enable_dma()
  77 #define fd_disable_dma()          sun_fdops.fd_disable_dma()
  78 #define fd_request_dma()          (0) /* nothing... */
  79 #define fd_free_dma()             /* nothing... */
  80 #define fd_clear_dma_ff()         /* nothing... */
  81 #define fd_set_dma_mode(mode)     sun_fdops.fd_set_dma_mode(mode)
  82 #define fd_set_dma_addr(addr)     sun_fdops.fd_set_dma_addr(addr)
  83 #define fd_set_dma_count(count)   sun_fdops.fd_set_dma_count(count)
  84 #define get_dma_residue(x)        sun_fdops.get_dma_residue()
  85 #define fd_enable_irq()           sun_fdops.fd_enable_irq()
  86 #define fd_disable_irq()          sun_fdops.fd_disable_irq()
  87 #define fd_cacheflush(addr, size) /* nothing... */
  88 #define fd_request_irq()          sun_fdops.fd_request_irq()
  89 #define fd_free_irq()             sun_fdops.fd_free_irq()
  90 #define fd_eject(drive)           sun_fdops.fd_eject(drive)
  91
  92 static int FLOPPY_MOTOR_MASK = 0x10;
  93
  94 /* Super paranoid... */
  95 #undef HAVE_DISABLE_HLT
  96
  97 static int sun_floppy_types[2] = { 0, 0 };
  98
  99 /* Here is where we catch the floppy driver trying to initialize,
 100  * therefore this is where we call the PROM device tree probing
 101  * routine etc. on the Sparc.
 102  */
 103 #define FLOPPY0_TYPE            sun_floppy_init()
 104 #define FLOPPY1_TYPE            sun_floppy_types[1]
 105
 106 #define FDC1                    ((unsigned long)sun_fdc)
 107 static int FDC2 =               -1;
 108
 109 #define N_FDC    1
 110 #define N_DRIVE  8
 111
 112 /* No 64k boundary crossing problems on the Sparc. */
 113 #define CROSS_64KB(a,s) (0)
 114
 115 static unsigned char sun_82077_fd_inb(unsigned long port)
 116 {
 117         udelay(5);
 118         switch(port & 7) {
 119         default:
 120                 printk("floppy: Asked to read unknown port %lx\n", port);
 121                 panic("floppy: Port bolixed.");
 122         case 4: /* FD_STATUS */
 123                 return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA;
 124         case 5: /* FD_DATA */
 125                 return sbus_readb(&sun_fdc->data_82077);
 126         case 7: /* FD_DIR */
 127                 /* XXX: Is DCL on 0x80 in sun4m? */
 128                 return sbus_readb(&sun_fdc->dir_82077);
 129         };
 130         panic("sun_82072_fd_inb: How did I get here?");
 131 }
 132
 133 static void sun_82077_fd_outb(unsigned char value, unsigned long port)
 134 {
 135         udelay(5);
 136         switch(port & 7) {
 137         default:
 138                 printk("floppy: Asked to write to unknown port %lx\n", port);
 139                 panic("floppy: Port bolixed.");
 140         case 2: /* FD_DOR */
 141                 /* Happily, the 82077 has a real DOR register. */
 142                 sbus_writeb(value, &sun_fdc->dor_82077);
 143                 break;
 144         case 5: /* FD_DATA */
 145                 sbus_writeb(value, &sun_fdc->data_82077);
 146                 break;
 147         case 7: /* FD_DCR */
 148                 sbus_writeb(value, &sun_fdc->dcr_82077);
 149                 break;
 150         case 4: /* FD_STATUS */
 151                 sbus_writeb(value, &sun_fdc->status_82077);
 152                 break;
 153         };
 154         return;
 155 }
 156
 157 /* For pseudo-dma (Sun floppy drives have no real DMA available to
 158  * them so we must eat the data fifo bytes directly ourselves) we have
 159  * three state variables.  doing_pdma tells our inline low-level
 160  * assembly floppy interrupt entry point whether it should sit and eat
 161  * bytes from the fifo or just transfer control up to the higher level
 162  * floppy interrupt c-code.  I tried very hard but I could not get the
 163  * pseudo-dma to work in c-code without getting many overruns and
 164  * underruns.  If non-zero, doing_pdma encodes the direction of
 165  * the transfer for debugging.  1=read 2=write
 166  */
 167 char *pdma_vaddr;
 168 unsigned long pdma_size;
 169 volatile int doing_pdma = 0;
 170
 171 /* This is software state */
 172 char *pdma_base = 0;
 173 unsigned long pdma_areasize;
 174
 175 /* Common routines to all controller types on the Sparc. */
 176 static __inline__ void virtual_dma_init(void)
 177 {
 178         /* nothing... */
 179 }
 180
 181 static void sun_fd_disable_dma(void)
 182 {
 183         doing_pdma = 0;
 184         if (pdma_base) {
 185                 mmu_unlockarea(pdma_base, pdma_areasize);
 186                 pdma_base = 0;
 187         }
 188 }
 189
 190 static void sun_fd_set_dma_mode(int mode)
 191 {
 192         switch(mode) {
 193         case DMA_MODE_READ:
 194                 doing_pdma = 1;
 195                 break;
 196         case DMA_MODE_WRITE:
 197                 doing_pdma = 2;
 198                 break;
 199         default:
 200                 printk("Unknown dma mode %d\n", mode);
 201                 panic("floppy: Giving up...");
 202         }
 203 }
 204
 205 static void sun_fd_set_dma_addr(char *buffer)
 206 {
 207         pdma_vaddr = buffer;
 208 }
 209
 210 static void sun_fd_set_dma_count(int length)
 211 {
 212         pdma_size = length;
 213 }
 214
 215 static void sun_fd_enable_dma(void)
 216 {
 217         pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size);
 218         pdma_base = pdma_vaddr;
 219         pdma_areasize = pdma_size;
 220 }
 221
 222 /* Our low-level entry point in arch/sparc/kernel/entry.S */
 223 extern void floppy_hardint(int irq, void *unused, struct pt_regs *regs);
 224
 225 static int sun_fd_request_irq(void)
 226 {
 227         static int once = 0;
 228         int error;
 229
 230         if(!once) {
 231                 once = 1;
 232
 233                 error = request_fast_irq(FLOPPY_IRQ, floppy_hardint,
 234                                         SA_INTERRUPT, "floppy", NULL);
 235
 236                 return ((error == 0) ? 0 : -1);
 237         }
 238         return 0;
 239 }
 240
 241 static void sun_fd_enable_irq(void)
 242 {
 243 }
 244
 245 static void sun_fd_disable_irq(void)
 246 {
 247 }
 248
 249 static void sun_fd_free_irq(void)
 250 {
 251 }
 252
 253 static unsigned int sun_get_dma_residue(void)
 254 {
 255         /* XXX This isn't really correct. XXX */
 256         return 0;
 257 }
 258
 259 static int sun_fd_eject(int drive)
 260 {
 261         set_dor(0x00, 0xff, 0x90);
 262         udelay(500);
 263         set_dor(0x00, 0x6f, 0x00);
 264         udelay(500);
 265         return 0;
 266 }
 267
 268 #ifdef CONFIG_PCI
 269 #include <asm/ebus.h>
 270 #include <asm/ns87303.h>
 271
 272 static struct linux_ebus_dma *sun_pci_fd_ebus_dma;
 273 static struct pci_dev *sun_pci_ebus_dev;
 274 static int sun_pci_broken_drive = -1;
 275 static unsigned int sun_pci_dma_addr = -1U;
 276 static int sun_pci_dma_len, sun_pci_dma_direction;
 277
 278 extern void floppy_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 279
 280 static unsigned char sun_pci_fd_inb(unsigned long port)
 281 {
 282         udelay(5);
 283         return inb(port);
 284 }
 285
 286 static void sun_pci_fd_outb(unsigned char val, unsigned long port)
 287 {
 288         udelay(5);
 289         outb(val, port);
 290 }
 291
 292 static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port)
 293 {
 294         udelay(5);
 295         /*
 296          * XXX: Due to SUN's broken floppy connector on AX and AXi
 297          *      we need to turn on MOTOR_0 also, if the floppy is
 298          *      jumpered to DS1 (like most PC floppies are). I hope
 299          *      this does not hurt correct hardware like the AXmp.
 300          *      (Eddie, Sep 12 1998).
 301          */
 302         if (port == ((unsigned long)sun_fdc) + 2) {
 303                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
 304                         val |= 0x10;
 305                 }
 306         }
 307         outb(val, port);
 308 }
 309
 310 #ifdef PCI_FDC_SWAP_DRIVES
 311 static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port)
 312 {
 313         udelay(5);
 314         /*
 315          * XXX: Due to SUN's broken floppy connector on AX and AXi
 316          *      we need to turn on MOTOR_0 also, if the floppy is
 317          *      jumpered to DS1 (like most PC floppies are). I hope
 318          *      this does not hurt correct hardware like the AXmp.
 319          *      (Eddie, Sep 12 1998).
 320          */
 321         if (port == ((unsigned long)sun_fdc) + 2) {
 322                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
 323                         val &= ~(0x03);
 324                         val |= 0x21;
 325                 }
 326         }
 327         outb(val, port);
 328 }
 329 #endif /* PCI_FDC_SWAP_DRIVES */
 330
 331 static void sun_pci_fd_reset_dma(void)
 332 {
 333         unsigned int dcsr;
 334
 335         writel(EBUS_DCSR_RESET, &sun_pci_fd_ebus_dma->dcsr);
 336         udelay(1);
 337         dcsr = EBUS_DCSR_BURST_SZ_16 | EBUS_DCSR_TCI_DIS |
 338                EBUS_DCSR_EN_CNT;
 339         writel(dcsr, (unsigned long)&sun_pci_fd_ebus_dma->dcsr);
 340 }
 341
 342 static void sun_pci_fd_enable_dma(void)
 343 {
 344         unsigned int dcsr;
 345
 346         dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
 347         dcsr |= EBUS_DCSR_EN_DMA;
 348         writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
 349 }
 350
 351 static void sun_pci_fd_disable_dma(void)
 352 {
 353         unsigned int dcsr;
 354
 355         dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
 356         if (dcsr & EBUS_DCSR_EN_DMA) {
 357                 while (dcsr & EBUS_DCSR_DRAIN) {
 358                         udelay(1);
 359                         dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
 360                 }
 361                 dcsr &= ~(EBUS_DCSR_EN_DMA);
 362                 writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
 363                 if (dcsr & EBUS_DCSR_ERR_PEND) {
 364                         sun_pci_fd_reset_dma();
 365                         dcsr &= ~(EBUS_DCSR_ERR_PEND);
 366                         writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
 367                 }
 368         }
 369         if (sun_pci_dma_addr != -1U)
 370                 pci_unmap_single(sun_pci_ebus_dev,
 371                                  sun_pci_dma_addr,
 372                                  sun_pci_dma_len,
 373                                  sun_pci_dma_direction);
 374         sun_pci_dma_addr = -1U;
 375 }
 376
 377 static void sun_pci_fd_set_dma_mode(int mode)
 378 {
 379         unsigned int dcsr;
 380
 381         dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
 382         if (readl(&sun_pci_fd_ebus_dma->dbcr)) {
 383                 sun_pci_fd_reset_dma();
 384                 writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
 385         }
 386
 387         dcsr |= EBUS_DCSR_EN_CNT | EBUS_DCSR_TC;
 388         /*
 389          * For EBus WRITE means to system memory, which is
 390          * READ for us.
 391          */
 392         if (mode == DMA_MODE_WRITE) {
 393                 dcsr &= ~(EBUS_DCSR_WRITE);
 394                 sun_pci_dma_direction = PCI_DMA_TODEVICE;
 395         } else {
 396                 dcsr |= EBUS_DCSR_WRITE;
 397                 sun_pci_dma_direction = PCI_DMA_FROMDEVICE;
 398         }
 399         writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
 400 }
 401
 402 static void sun_pci_fd_set_dma_count(int length)
 403 {
 404         sun_pci_dma_len = length;
 405         writel(length, &sun_pci_fd_ebus_dma->dbcr);
 406 }
 407
 408 static void sun_pci_fd_set_dma_addr(char *buffer)
 409 {
 410         unsigned int addr;
 411
 412         addr = sun_pci_dma_addr = pci_map_single(sun_pci_ebus_dev,
 413                                                  buffer,
 414                                                  sun_pci_dma_len,
 415                                                  sun_pci_dma_direction);
 416         writel(addr, &sun_pci_fd_ebus_dma->dacr);
 417 }
 418
 419 static unsigned int sun_pci_get_dma_residue(void)
 420 {
 421         unsigned int dcsr, res;
 422
 423         res = readl(&sun_pci_fd_ebus_dma->dbcr);
 424         if (res != 0) {
 425                 dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
 426                 sun_pci_fd_reset_dma();
 427                 writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
 428         }
 429         return res;
 430 }
 431
 432 static void sun_pci_fd_enable_irq(void)
 433 {
 434         unsigned int dcsr;
 435
 436         dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
 437         dcsr |= EBUS_DCSR_INT_EN;
 438         writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
 439 }
 440
 441 static void sun_pci_fd_disable_irq(void)
 442 {
 443         unsigned int dcsr;
 444
 445         dcsr = readl(&sun_pci_fd_ebus_dma->dcsr);
 446         dcsr &= ~(EBUS_DCSR_INT_EN);
 447         writel(dcsr, &sun_pci_fd_ebus_dma->dcsr);
 448 }
 449
 450 static int sun_pci_fd_request_irq(void)
 451 {
 452         int err;
 453
 454         err = request_irq(FLOPPY_IRQ, floppy_interrupt, SA_SHIRQ,
 455                           "floppy", sun_fdc);
 456         if (err)
 457                 return -1;
 458         sun_pci_fd_enable_irq();
 459         return 0;
 460 }
 461
 462 static void sun_pci_fd_free_irq(void)
 463 {
 464         sun_pci_fd_disable_irq();
 465         free_irq(FLOPPY_IRQ, sun_fdc);
 466 }
 467
 468 static int sun_pci_fd_eject(int drive)
 469 {
 470         return -EINVAL;
 471 }
 472
 473
 474 /*
 475  * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI,
 476  * even if this is configured using DS1, thus looks like /dev/fd1 with
 477  * the cabling used in Ultras.
 478  */
 479 #define DOR     (port + 2)
 480 #define MSR     (port + 4)
 481 #define FIFO    (port + 5)
 482
 483 static void sun_pci_fd_out_byte(unsigned long port, unsigned char val,
 484                                 unsigned long reg)
 485 {
 486         unsigned char status;
 487         int timeout = 1000;
 488
 489         while (!((status = inb(MSR)) & 0x80) && --timeout)
 490                 udelay(100);
 491         outb(val, reg);
 492 }
 493
 494 static unsigned char sun_pci_fd_sensei(unsigned long port)
 495 {
 496         unsigned char result[2] = { 0x70, 0x00 };
 497         unsigned char status;
 498         int i = 0;
 499
 500         sun_pci_fd_out_byte(port, 0x08, FIFO);
 501         do {
 502                 int timeout = 1000;
 503
 504                 while (!((status = inb(MSR)) & 0x80) && --timeout)
 505                         udelay(100);
 506
 507                 if (!timeout)
 508                         break;
 509
 510                 if ((status & 0xf0) == 0xd0)
 511                         result[i++] = inb(FIFO);
 512                 else
 513                         break;
 514         } while (i < 2);
 515
 516         return result[0];
 517 }
 518
 519 static void sun_pci_fd_reset(unsigned long port)
 520 {
 521         unsigned char mask = 0x00;
 522         unsigned char status;
 523         int timeout = 10000;
 524
 525         outb(0x80, MSR);
 526         do {
 527                 status = sun_pci_fd_sensei(port);
 528                 if ((status & 0xc0) == 0xc0)
 529                         mask |= 1 << (status & 0x03);
 530                 else
 531                         udelay(100);
 532         } while ((mask != 0x0f) && --timeout);
 533 }
 534
 535 static int sun_pci_fd_test_drive(unsigned long port, int drive)
 536 {
 537         unsigned char status, data;
 538         int timeout = 1000;
 539         int ready;
 540
 541         sun_pci_fd_reset(port);
 542
 543         data = (0x10 << drive) | 0x0c | drive;
 544         sun_pci_fd_out_byte(port, data, DOR);
 545
 546         sun_pci_fd_out_byte(port, 0x07, FIFO);
 547         sun_pci_fd_out_byte(port, drive & 0x03, FIFO);
 548
 549         do {
 550                 udelay(100);
 551                 status = sun_pci_fd_sensei(port);
 552         } while (((status & 0xc0) == 0x80) && --timeout);
 553
 554         if (!timeout)
 555                 ready = 0;
 556         else
 557                 ready = (status & 0x10) ? 0 : 1;
 558
 559         sun_pci_fd_reset(port);
 560         return ready;
 561 }
 562 #undef FIFO
 563 #undef MSR
 564 #undef DOR
 565
 566 #endif /* CONFIG_PCI */
 567
 568 static unsigned long __init sun_floppy_init(void)
 569 {
 570         char state[128];
 571         struct sbus_bus *bus;
 572         struct sbus_dev *sdev = NULL;
 573         static int initialized = 0;
 574
 575         if (initialized)
 576                 return sun_floppy_types[0];
 577         initialized = 1;
 578
 579         for_all_sbusdev (sdev, bus) {
 580                 if (!strcmp(sdev->prom_name, "SUNW,fdtwo"))
 581                         break;
 582         }
 583         if(sdev) {
 584                 floppy_sdev = sdev;
 585                 FLOPPY_IRQ = sdev->irqs[0];
 586         } else {
 587 #ifdef CONFIG_PCI
 588                 struct linux_ebus *ebus;
 589                 struct linux_ebus_device *edev = 0;
 590                 unsigned long config = 0;
 591                 unsigned long auxio_reg;
 592
 593                 for_each_ebus(ebus) {
 594                         for_each_ebusdev(edev, ebus) {
 595                                 if (!strcmp(edev->prom_name, "fdthree"))
 596                                         goto ebus_done;
 597                         }
 598                 }
 599         ebus_done:
 600                 if (!edev)
 601                         return 0;
 602
 603                 prom_getproperty(edev->prom_node, "status",
 604                                  state, sizeof(state));
 605                 if(!strncmp(state, "disabled", 8))
 606                         return 0;
 607
 608                 sun_fdc = (struct sun_flpy_controller *)edev->resource[0].start;
 609                 FLOPPY_IRQ = edev->irqs[0];
 610
 611                 /* Make sure the high density bit is set, some systems
 612                  * (most notably Ultra5/Ultra10) come up with it clear.
 613                  */
 614                 auxio_reg = edev->resource[2].start;
 615                 writel(readl(auxio_reg)|0x2, auxio_reg);
 616
 617                 sun_pci_ebus_dev = ebus->self;
 618
 619                 sun_pci_fd_ebus_dma = (struct linux_ebus_dma *)
 620                         edev->resource[1].start;
 621                 sun_pci_fd_reset_dma();
 622
 623                 sun_fdops.fd_inb = sun_pci_fd_inb;
 624                 sun_fdops.fd_outb = sun_pci_fd_outb;
 625
 626                 use_virtual_dma = 0;
 627                 sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma;
 628                 sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma;
 629                 sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode;
 630                 sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr;
 631                 sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count;
 632                 sun_fdops.get_dma_residue = sun_pci_get_dma_residue;
 633
 634                 sun_fdops.fd_enable_irq = sun_pci_fd_enable_irq;
 635                 sun_fdops.fd_disable_irq = sun_pci_fd_disable_irq;
 636                 sun_fdops.fd_request_irq = sun_pci_fd_request_irq;
 637                 sun_fdops.fd_free_irq = sun_pci_fd_free_irq;
 638
 639                 sun_fdops.fd_eject = sun_pci_fd_eject;
 640
 641                 fdc_status = (unsigned long) &sun_fdc->status_82077;
 642                 FLOPPY_MOTOR_MASK = 0xf0;
 643
 644                 /*
 645                  * XXX: Find out on which machines this is really needed.
 646                  */
 647                 if (1) {
 648                         sun_pci_broken_drive = 1;
 649                         sun_fdops.fd_outb = sun_pci_fd_broken_outb;
 650                 }
 651
 652                 allowed_drive_mask = 0;
 653                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0))
 654                         sun_floppy_types[0] = 4;
 655                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1))
 656                         sun_floppy_types[1] = 4;
 657
 658                 /*
 659                  * Find NS87303 SuperIO config registers (through ecpp).
 660                  */
 661                 for_each_ebus(ebus) {
 662                         for_each_ebusdev(edev, ebus) {
 663                                 if (!strcmp(edev->prom_name, "ecpp")) {
 664                                         config = edev->resource[1].start;
 665                                         goto config_done;
 666                                 }
 667                         }
 668                 }
 669         config_done:
 670
 671                 /*
 672                  * Sanity check, is this really the NS87303?
 673                  */
 674                 switch (config & 0x3ff) {
 675                 case 0x02e:
 676                 case 0x15c:
 677                 case 0x26e:
 678                 case 0x398:
 679                         break;
 680                 default:
 681                         config = 0;
 682                 }
 683
 684                 if (!config)
 685                         return sun_floppy_types[0];
 686
 687                 /* Enable PC-AT mode. */
 688                 ns87303_modify(config, ASC, 0, 0xc0);
 689
 690 #ifdef PCI_FDC_SWAP_DRIVES
 691                 /*
 692                  * If only Floppy 1 is present, swap drives.
 693                  */
 694                 if (!sun_floppy_types[0] && sun_floppy_types[1]) {
 695                         /*
 696                          * Set the drive exchange bit in FCR on NS87303,
 697                          * make shure other bits are sane before doing so.
 698                          */
 699                         ns87303_modify(config, FER, FER_EDM, 0);
 700                         ns87303_modify(config, ASC, ASC_DRV2_SEL, 0);
 701                         ns87303_modify(config, FCR, 0, FCR_LDE);
 702
 703                         cfg = sun_floppy_types[0];
 704                         sun_floppy_types[0] = sun_floppy_types[1];
 705                         sun_floppy_types[1] = cfg;
 706
 707                         if (sun_pci_broken_drive != -1) {
 708                                 sun_pci_broken_drive = 1 - sun_pci_broken_drive;
 709                                 sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb;
 710                         }
 711                 }
 712 #endif /* PCI_FDC_SWAP_DRIVES */
 713
 714                 return sun_floppy_types[0];
 715 #else
 716                 return 0;
 717 #endif
 718         }
 719         prom_getproperty(sdev->prom_node, "status", state, sizeof(state));
 720         if(!strncmp(state, "disabled", 8))
 721                 return 0;
 722
 723         /*
 724          * We cannot do sbus_ioremap here: it does request_region,
 725          * which the generic floppy driver tries to do once again.
 726          * But we must use the sdev resource values as they have
 727          * had parent ranges applied.
 728          */
 729         sun_fdc = (struct sun_flpy_controller *)
 730                 (sdev->resource[0].start +
 731                  ((sdev->resource[0].flags & 0x1ffUL) << 32UL));
 732
 733         /* Last minute sanity check... */
 734         if(sbus_readb(&sun_fdc->status1_82077) == 0xff) {
 735                 sun_fdc = (struct sun_flpy_controller *)-1;
 736                 return 0;
 737         }
 738
 739         sun_fdops.fd_inb = sun_82077_fd_inb;
 740         sun_fdops.fd_outb = sun_82077_fd_outb;
 741
 742         can_use_virtual_dma = use_virtual_dma = 1;
 743         sun_fdops.fd_enable_dma = sun_fd_enable_dma;
 744         sun_fdops.fd_disable_dma = sun_fd_disable_dma;
 745         sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
 746         sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
 747         sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
 748         sun_fdops.get_dma_residue = sun_get_dma_residue;
 749
 750         sun_fdops.fd_enable_irq = sun_fd_enable_irq;
 751         sun_fdops.fd_disable_irq = sun_fd_disable_irq;
 752         sun_fdops.fd_request_irq = sun_fd_request_irq;
 753         sun_fdops.fd_free_irq = sun_fd_free_irq;
 754
 755         sun_fdops.fd_eject = sun_fd_eject;
 756
 757         fdc_status = (unsigned long) &sun_fdc->status_82077;
 758
 759         /* Success... */
 760         allowed_drive_mask = 0x01;
 761         sun_floppy_types[0] = 4;
 762         sun_floppy_types[1] = 0;
 763
 764         return sun_floppy_types[0];
 765 }
 766
 767 #endif /* !(__ASM_SPARC64_FLOPPY_H) */