include/asm-sparc64/floppy.h

   1 /* floppy.h: Sparc specific parts of the Floppy driver.
   2  *
   3  * Copyright (C) 1996, 2007 David S. Miller (davem@davemloft.net)
   4  * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   5  *
   6  * Ultra/PCI support added: Sep 1997  Eddie C. Dost  (ecd@skynet.be)
   7  */
   8
   9 #ifndef __ASM_SPARC64_FLOPPY_H
  10 #define __ASM_SPARC64_FLOPPY_H
  11
  12 #include <linux/init.h>
  13 #include <linux/pci.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 /* Super paranoid... */
  88 #undef HAVE_DISABLE_HLT
  89
  90 static int sun_floppy_types[2] = { 0, 0 };
  91
  92 /* Here is where we catch the floppy driver trying to initialize,
  93  * therefore this is where we call the PROM device tree probing
  94  * routine etc. on the Sparc.
  95  */
  96 #define FLOPPY0_TYPE            sun_floppy_init()
  97 #define FLOPPY1_TYPE            sun_floppy_types[1]
  98
  99 #define FDC1                    ((unsigned long)sun_fdc)
 100
 101 #define N_FDC    1
 102 #define N_DRIVE  8
 103
 104 /* No 64k boundary crossing problems on the Sparc. */
 105 #define CROSS_64KB(a,s) (0)
 106
 107 static unsigned char sun_82077_fd_inb(unsigned long port)
 108 {
 109         udelay(5);
 110         switch(port & 7) {
 111         default:
 112                 printk("floppy: Asked to read unknown port %lx\n", port);
 113                 panic("floppy: Port bolixed.");
 114         case 4: /* FD_STATUS */
 115                 return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA;
 116         case 5: /* FD_DATA */
 117                 return sbus_readb(&sun_fdc->data_82077);
 118         case 7: /* FD_DIR */
 119                 /* XXX: Is DCL on 0x80 in sun4m? */
 120                 return sbus_readb(&sun_fdc->dir_82077);
 121         };
 122         panic("sun_82072_fd_inb: How did I get here?");
 123 }
 124
 125 static void sun_82077_fd_outb(unsigned char value, unsigned long port)
 126 {
 127         udelay(5);
 128         switch(port & 7) {
 129         default:
 130                 printk("floppy: Asked to write to unknown port %lx\n", port);
 131                 panic("floppy: Port bolixed.");
 132         case 2: /* FD_DOR */
 133                 /* Happily, the 82077 has a real DOR register. */
 134                 sbus_writeb(value, &sun_fdc->dor_82077);
 135                 break;
 136         case 5: /* FD_DATA */
 137                 sbus_writeb(value, &sun_fdc->data_82077);
 138                 break;
 139         case 7: /* FD_DCR */
 140                 sbus_writeb(value, &sun_fdc->dcr_82077);
 141                 break;
 142         case 4: /* FD_STATUS */
 143                 sbus_writeb(value, &sun_fdc->status_82077);
 144                 break;
 145         };
 146         return;
 147 }
 148
 149 /* For pseudo-dma (Sun floppy drives have no real DMA available to
 150  * them so we must eat the data fifo bytes directly ourselves) we have
 151  * three state variables.  doing_pdma tells our inline low-level
 152  * assembly floppy interrupt entry point whether it should sit and eat
 153  * bytes from the fifo or just transfer control up to the higher level
 154  * floppy interrupt c-code.  I tried very hard but I could not get the
 155  * pseudo-dma to work in c-code without getting many overruns and
 156  * underruns.  If non-zero, doing_pdma encodes the direction of
 157  * the transfer for debugging.  1=read 2=write
 158  */
 159 unsigned char *pdma_vaddr;
 160 unsigned long pdma_size;
 161 volatile int doing_pdma = 0;
 162
 163 /* This is software state */
 164 char *pdma_base = NULL;
 165 unsigned long pdma_areasize;
 166
 167 /* Common routines to all controller types on the Sparc. */
 168 static void sun_fd_disable_dma(void)
 169 {
 170         doing_pdma = 0;
 171         if (pdma_base) {
 172                 mmu_unlockarea(pdma_base, pdma_areasize);
 173                 pdma_base = NULL;
 174         }
 175 }
 176
 177 static void sun_fd_set_dma_mode(int mode)
 178 {
 179         switch(mode) {
 180         case DMA_MODE_READ:
 181                 doing_pdma = 1;
 182                 break;
 183         case DMA_MODE_WRITE:
 184                 doing_pdma = 2;
 185                 break;
 186         default:
 187                 printk("Unknown dma mode %d\n", mode);
 188                 panic("floppy: Giving up...");
 189         }
 190 }
 191
 192 static void sun_fd_set_dma_addr(char *buffer)
 193 {
 194         pdma_vaddr = buffer;
 195 }
 196
 197 static void sun_fd_set_dma_count(int length)
 198 {
 199         pdma_size = length;
 200 }
 201
 202 static void sun_fd_enable_dma(void)
 203 {
 204         pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size);
 205         pdma_base = pdma_vaddr;
 206         pdma_areasize = pdma_size;
 207 }
 208
 209 irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie)
 210 {
 211         if (likely(doing_pdma)) {
 212                 void __iomem *stat = (void __iomem *) fdc_status;
 213                 unsigned char *vaddr = pdma_vaddr;
 214                 unsigned long size = pdma_size;
 215                 u8 val;
 216
 217                 while (size) {
 218                         val = readb(stat);
 219                         if (unlikely(!(val & 0x80))) {
 220                                 pdma_vaddr = vaddr;
 221                                 pdma_size = size;
 222                                 return IRQ_HANDLED;
 223                         }
 224                         if (unlikely(!(val & 0x20))) {
 225                                 pdma_vaddr = vaddr;
 226                                 pdma_size = size;
 227                                 doing_pdma = 0;
 228                                 goto main_interrupt;
 229                         }
 230                         if (val & 0x40) {
 231                                 /* read */
 232                                 *vaddr++ = readb(stat + 1);
 233                         } else {
 234                                 unsigned char data = *vaddr++;
 235
 236                                 /* write */
 237                                 writeb(data, stat + 1);
 238                         }
 239                         size--;
 240                 }
 241
 242                 pdma_vaddr = vaddr;
 243                 pdma_size = size;
 244
 245                 /* Send Terminal Count pulse to floppy controller. */
 246                 val = readb(auxio_register);
 247                 val |= AUXIO_AUX1_FTCNT;
 248                 writeb(val, auxio_register);
 249                 val &= ~AUXIO_AUX1_FTCNT;
 250                 writeb(val, auxio_register);
 251
 252                 doing_pdma = 0;
 253         }
 254
 255 main_interrupt:
 256         return floppy_interrupt(irq, dev_cookie);
 257 }
 258
 259 static int sun_fd_request_irq(void)
 260 {
 261         static int once = 0;
 262         int error;
 263
 264         if(!once) {
 265                 once = 1;
 266
 267                 error = request_irq(FLOPPY_IRQ, sparc_floppy_irq,
 268                                     IRQF_DISABLED, "floppy", NULL);
 269
 270                 return ((error == 0) ? 0 : -1);
 271         }
 272         return 0;
 273 }
 274
 275 static void sun_fd_free_irq(void)
 276 {
 277 }
 278
 279 static unsigned int sun_get_dma_residue(void)
 280 {
 281         /* XXX This isn't really correct. XXX */
 282         return 0;
 283 }
 284
 285 static int sun_fd_eject(int drive)
 286 {
 287         set_dor(0x00, 0xff, 0x90);
 288         udelay(500);
 289         set_dor(0x00, 0x6f, 0x00);
 290         udelay(500);
 291         return 0;
 292 }
 293
 294 #ifdef CONFIG_PCI
 295 #include <asm/ebus.h>
 296 #include <asm/ns87303.h>
 297
 298 static struct ebus_dma_info sun_pci_fd_ebus_dma;
 299 static struct pci_dev *sun_pci_ebus_dev;
 300 static int sun_pci_broken_drive = -1;
 301
 302 struct sun_pci_dma_op {
 303         unsigned int    addr;
 304         int             len;
 305         int             direction;
 306         char            *buf;
 307 };
 308 static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL};
 309 static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL};
 310
 311 extern irqreturn_t floppy_interrupt(int irq, void *dev_id);
 312
 313 static unsigned char sun_pci_fd_inb(unsigned long port)
 314 {
 315         udelay(5);
 316         return inb(port);
 317 }
 318
 319 static void sun_pci_fd_outb(unsigned char val, unsigned long port)
 320 {
 321         udelay(5);
 322         outb(val, port);
 323 }
 324
 325 static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port)
 326 {
 327         udelay(5);
 328         /*
 329          * XXX: Due to SUN's broken floppy connector on AX and AXi
 330          *      we need to turn on MOTOR_0 also, if the floppy is
 331          *      jumpered to DS1 (like most PC floppies are). I hope
 332          *      this does not hurt correct hardware like the AXmp.
 333          *      (Eddie, Sep 12 1998).
 334          */
 335         if (port == ((unsigned long)sun_fdc) + 2) {
 336                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
 337                         val |= 0x10;
 338                 }
 339         }
 340         outb(val, port);
 341 }
 342
 343 #ifdef PCI_FDC_SWAP_DRIVES
 344 static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port)
 345 {
 346         udelay(5);
 347         /*
 348          * XXX: Due to SUN's broken floppy connector on AX and AXi
 349          *      we need to turn on MOTOR_0 also, if the floppy is
 350          *      jumpered to DS1 (like most PC floppies are). I hope
 351          *      this does not hurt correct hardware like the AXmp.
 352          *      (Eddie, Sep 12 1998).
 353          */
 354         if (port == ((unsigned long)sun_fdc) + 2) {
 355                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
 356                         val &= ~(0x03);
 357                         val |= 0x21;
 358                 }
 359         }
 360         outb(val, port);
 361 }
 362 #endif /* PCI_FDC_SWAP_DRIVES */
 363
 364 static void sun_pci_fd_enable_dma(void)
 365 {
 366         BUG_ON((NULL == sun_pci_dma_pending.buf)        ||
 367             (0    == sun_pci_dma_pending.len)   ||
 368             (0    == sun_pci_dma_pending.direction));
 369
 370         sun_pci_dma_current.buf = sun_pci_dma_pending.buf;
 371         sun_pci_dma_current.len = sun_pci_dma_pending.len;
 372         sun_pci_dma_current.direction = sun_pci_dma_pending.direction;
 373
 374         sun_pci_dma_pending.buf  = NULL;
 375         sun_pci_dma_pending.len  = 0;
 376         sun_pci_dma_pending.direction = 0;
 377         sun_pci_dma_pending.addr = -1U;
 378
 379         sun_pci_dma_current.addr =
 380                 pci_map_single(sun_pci_ebus_dev,
 381                                sun_pci_dma_current.buf,
 382                                sun_pci_dma_current.len,
 383                                sun_pci_dma_current.direction);
 384
 385         ebus_dma_enable(&sun_pci_fd_ebus_dma, 1);
 386
 387         if (ebus_dma_request(&sun_pci_fd_ebus_dma,
 388                              sun_pci_dma_current.addr,
 389                              sun_pci_dma_current.len))
 390                 BUG();
 391 }
 392
 393 static void sun_pci_fd_disable_dma(void)
 394 {
 395         ebus_dma_enable(&sun_pci_fd_ebus_dma, 0);
 396         if (sun_pci_dma_current.addr != -1U)
 397                 pci_unmap_single(sun_pci_ebus_dev,
 398                                  sun_pci_dma_current.addr,
 399                                  sun_pci_dma_current.len,
 400                                  sun_pci_dma_current.direction);
 401         sun_pci_dma_current.addr = -1U;
 402 }
 403
 404 static void sun_pci_fd_set_dma_mode(int mode)
 405 {
 406         if (mode == DMA_MODE_WRITE)
 407                 sun_pci_dma_pending.direction = PCI_DMA_TODEVICE;
 408         else
 409                 sun_pci_dma_pending.direction = PCI_DMA_FROMDEVICE;
 410
 411         ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE);
 412 }
 413
 414 static void sun_pci_fd_set_dma_count(int length)
 415 {
 416         sun_pci_dma_pending.len = length;
 417 }
 418
 419 static void sun_pci_fd_set_dma_addr(char *buffer)
 420 {
 421         sun_pci_dma_pending.buf = buffer;
 422 }
 423
 424 static unsigned int sun_pci_get_dma_residue(void)
 425 {
 426         return ebus_dma_residue(&sun_pci_fd_ebus_dma);
 427 }
 428
 429 static int sun_pci_fd_request_irq(void)
 430 {
 431         return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1);
 432 }
 433
 434 static void sun_pci_fd_free_irq(void)
 435 {
 436         ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0);
 437 }
 438
 439 static int sun_pci_fd_eject(int drive)
 440 {
 441         return -EINVAL;
 442 }
 443
 444 void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie)
 445 {
 446         floppy_interrupt(0, NULL);
 447 }
 448
 449 /*
 450  * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI,
 451  * even if this is configured using DS1, thus looks like /dev/fd1 with
 452  * the cabling used in Ultras.
 453  */
 454 #define DOR     (port + 2)
 455 #define MSR     (port + 4)
 456 #define FIFO    (port + 5)
 457
 458 static void sun_pci_fd_out_byte(unsigned long port, unsigned char val,
 459                                 unsigned long reg)
 460 {
 461         unsigned char status;
 462         int timeout = 1000;
 463
 464         while (!((status = inb(MSR)) & 0x80) && --timeout)
 465                 udelay(100);
 466         outb(val, reg);
 467 }
 468
 469 static unsigned char sun_pci_fd_sensei(unsigned long port)
 470 {
 471         unsigned char result[2] = { 0x70, 0x00 };
 472         unsigned char status;
 473         int i = 0;
 474
 475         sun_pci_fd_out_byte(port, 0x08, FIFO);
 476         do {
 477                 int timeout = 1000;
 478
 479                 while (!((status = inb(MSR)) & 0x80) && --timeout)
 480                         udelay(100);
 481
 482                 if (!timeout)
 483                         break;
 484
 485                 if ((status & 0xf0) == 0xd0)
 486                         result[i++] = inb(FIFO);
 487                 else
 488                         break;
 489         } while (i < 2);
 490
 491         return result[0];
 492 }
 493
 494 static void sun_pci_fd_reset(unsigned long port)
 495 {
 496         unsigned char mask = 0x00;
 497         unsigned char status;
 498         int timeout = 10000;
 499
 500         outb(0x80, MSR);
 501         do {
 502                 status = sun_pci_fd_sensei(port);
 503                 if ((status & 0xc0) == 0xc0)
 504                         mask |= 1 << (status & 0x03);
 505                 else
 506                         udelay(100);
 507         } while ((mask != 0x0f) && --timeout);
 508 }
 509
 510 static int sun_pci_fd_test_drive(unsigned long port, int drive)
 511 {
 512         unsigned char status, data;
 513         int timeout = 1000;
 514         int ready;
 515
 516         sun_pci_fd_reset(port);
 517
 518         data = (0x10 << drive) | 0x0c | drive;
 519         sun_pci_fd_out_byte(port, data, DOR);
 520
 521         sun_pci_fd_out_byte(port, 0x07, FIFO);
 522         sun_pci_fd_out_byte(port, drive & 0x03, FIFO);
 523
 524         do {
 525                 udelay(100);
 526                 status = sun_pci_fd_sensei(port);
 527         } while (((status & 0xc0) == 0x80) && --timeout);
 528
 529         if (!timeout)
 530                 ready = 0;
 531         else
 532                 ready = (status & 0x10) ? 0 : 1;
 533
 534         sun_pci_fd_reset(port);
 535         return ready;
 536 }
 537 #undef FIFO
 538 #undef MSR
 539 #undef DOR
 540
 541 #endif /* CONFIG_PCI */
 542
 543 #ifdef CONFIG_PCI
 544 static int __init ebus_fdthree_p(struct linux_ebus_device *edev)
 545 {
 546         if (!strcmp(edev->prom_node->name, "fdthree"))
 547                 return 1;
 548         if (!strcmp(edev->prom_node->name, "floppy")) {
 549                 const char *compat;
 550
 551                 compat = of_get_property(edev->prom_node,
 552                                          "compatible", NULL);
 553                 if (compat && !strcmp(compat, "fdthree"))
 554                         return 1;
 555         }
 556         return 0;
 557 }
 558 #endif
 559
 560 static unsigned long __init sun_floppy_init(void)
 561 {
 562         char state[128];
 563         struct sbus_bus *bus;
 564         struct sbus_dev *sdev = NULL;
 565         static int initialized = 0;
 566
 567         if (initialized)
 568                 return sun_floppy_types[0];
 569         initialized = 1;
 570
 571         for_all_sbusdev (sdev, bus) {
 572                 if (!strcmp(sdev->prom_name, "SUNW,fdtwo"))
 573                         break;
 574         }
 575         if(sdev) {
 576                 floppy_sdev = sdev;
 577                 FLOPPY_IRQ = sdev->irqs[0];
 578         } else {
 579 #ifdef CONFIG_PCI
 580                 struct linux_ebus *ebus;
 581                 struct linux_ebus_device *edev = NULL;
 582                 unsigned long config = 0;
 583                 void __iomem *auxio_reg;
 584                 const char *state_prop;
 585
 586                 for_each_ebus(ebus) {
 587                         for_each_ebusdev(edev, ebus) {
 588                                 if (ebus_fdthree_p(edev))
 589                                         goto ebus_done;
 590                         }
 591                 }
 592         ebus_done:
 593                 if (!edev)
 594                         return 0;
 595
 596                 state_prop = of_get_property(edev->prom_node, "status", NULL);
 597                 if (state_prop && !strncmp(state_prop, "disabled", 8))
 598                         return 0;
 599
 600                 FLOPPY_IRQ = edev->irqs[0];
 601
 602                 /* Make sure the high density bit is set, some systems
 603                  * (most notably Ultra5/Ultra10) come up with it clear.
 604                  */
 605                 auxio_reg = (void __iomem *) edev->resource[2].start;
 606                 writel(readl(auxio_reg)|0x2, auxio_reg);
 607
 608                 sun_pci_ebus_dev = ebus->self;
 609
 610                 spin_lock_init(&sun_pci_fd_ebus_dma.lock);
 611
 612                 /* XXX ioremap */
 613                 sun_pci_fd_ebus_dma.regs = (void __iomem *)
 614                         edev->resource[1].start;
 615                 if (!sun_pci_fd_ebus_dma.regs)
 616                         return 0;
 617
 618                 sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER |
 619                                              EBUS_DMA_FLAG_TCI_DISABLE);
 620                 sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback;
 621                 sun_pci_fd_ebus_dma.client_cookie = NULL;
 622                 sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ;
 623                 strcpy(sun_pci_fd_ebus_dma.name, "floppy");
 624                 if (ebus_dma_register(&sun_pci_fd_ebus_dma))
 625                         return 0;
 626
 627                 /* XXX ioremap */
 628                 sun_fdc = (struct sun_flpy_controller *)edev->resource[0].start;
 629
 630                 sun_fdops.fd_inb = sun_pci_fd_inb;
 631                 sun_fdops.fd_outb = sun_pci_fd_outb;
 632
 633                 can_use_virtual_dma = use_virtual_dma = 0;
 634                 sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma;
 635                 sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma;
 636                 sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode;
 637                 sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr;
 638                 sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count;
 639                 sun_fdops.get_dma_residue = sun_pci_get_dma_residue;
 640
 641                 sun_fdops.fd_request_irq = sun_pci_fd_request_irq;
 642                 sun_fdops.fd_free_irq = sun_pci_fd_free_irq;
 643
 644                 sun_fdops.fd_eject = sun_pci_fd_eject;
 645
 646                 fdc_status = (unsigned long) &sun_fdc->status_82077;
 647
 648                 /*
 649                  * XXX: Find out on which machines this is really needed.
 650                  */
 651                 if (1) {
 652                         sun_pci_broken_drive = 1;
 653                         sun_fdops.fd_outb = sun_pci_fd_broken_outb;
 654                 }
 655
 656                 allowed_drive_mask = 0;
 657                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0))
 658                         sun_floppy_types[0] = 4;
 659                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1))
 660                         sun_floppy_types[1] = 4;
 661
 662                 /*
 663                  * Find NS87303 SuperIO config registers (through ecpp).
 664                  */
 665                 for_each_ebus(ebus) {
 666                         for_each_ebusdev(edev, ebus) {
 667                                 if (!strcmp(edev->prom_node->name, "ecpp")) {
 668                                         config = edev->resource[1].start;
 669                                         goto config_done;
 670                                 }
 671                         }
 672                 }
 673         config_done:
 674
 675                 /*
 676                  * Sanity check, is this really the NS87303?
 677                  */
 678                 switch (config & 0x3ff) {
 679                 case 0x02e:
 680                 case 0x15c:
 681                 case 0x26e:
 682                 case 0x398:
 683                         break;
 684                 default:
 685                         config = 0;
 686                 }
 687
 688                 if (!config)
 689                         return sun_floppy_types[0];
 690
 691                 /* Enable PC-AT mode. */
 692                 ns87303_modify(config, ASC, 0, 0xc0);
 693
 694 #ifdef PCI_FDC_SWAP_DRIVES
 695                 /*
 696                  * If only Floppy 1 is present, swap drives.
 697                  */
 698                 if (!sun_floppy_types[0] && sun_floppy_types[1]) {
 699                         /*
 700                          * Set the drive exchange bit in FCR on NS87303,
 701                          * make sure other bits are sane before doing so.
 702                          */
 703                         ns87303_modify(config, FER, FER_EDM, 0);
 704                         ns87303_modify(config, ASC, ASC_DRV2_SEL, 0);
 705                         ns87303_modify(config, FCR, 0, FCR_LDE);
 706
 707                         config = sun_floppy_types[0];
 708                         sun_floppy_types[0] = sun_floppy_types[1];
 709                         sun_floppy_types[1] = config;
 710
 711                         if (sun_pci_broken_drive != -1) {
 712                                 sun_pci_broken_drive = 1 - sun_pci_broken_drive;
 713                                 sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb;
 714                         }
 715                 }
 716 #endif /* PCI_FDC_SWAP_DRIVES */
 717
 718                 return sun_floppy_types[0];
 719 #else
 720                 return 0;
 721 #endif
 722         }
 723         prom_getproperty(sdev->prom_node, "status", state, sizeof(state));
 724         if(!strncmp(state, "disabled", 8))
 725                 return 0;
 726
 727         /*
 728          * We cannot do sbus_ioremap here: it does request_region,
 729          * which the generic floppy driver tries to do once again.
 730          * But we must use the sdev resource values as they have
 731          * had parent ranges applied.
 732          */
 733         sun_fdc = (struct sun_flpy_controller *)
 734                 (sdev->resource[0].start +
 735                  ((sdev->resource[0].flags & 0x1ffUL) << 32UL));
 736
 737         /* Last minute sanity check... */
 738         if(sbus_readb(&sun_fdc->status1_82077) == 0xff) {
 739                 sun_fdc = (struct sun_flpy_controller *)-1;
 740                 return 0;
 741         }
 742
 743         sun_fdops.fd_inb = sun_82077_fd_inb;
 744         sun_fdops.fd_outb = sun_82077_fd_outb;
 745
 746         can_use_virtual_dma = use_virtual_dma = 1;
 747         sun_fdops.fd_enable_dma = sun_fd_enable_dma;
 748         sun_fdops.fd_disable_dma = sun_fd_disable_dma;
 749         sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
 750         sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
 751         sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
 752         sun_fdops.get_dma_residue = sun_get_dma_residue;
 753
 754         sun_fdops.fd_request_irq = sun_fd_request_irq;
 755         sun_fdops.fd_free_irq = sun_fd_free_irq;
 756
 757         sun_fdops.fd_eject = sun_fd_eject;
 758
 759         fdc_status = (unsigned long) &sun_fdc->status_82077;
 760
 761         /* Success... */
 762         allowed_drive_mask = 0x01;
 763         sun_floppy_types[0] = 4;
 764         sun_floppy_types[1] = 0;
 765
 766         return sun_floppy_types[0];
 767 }
 768
 769 #define EXTRA_FLOPPY_PARAMS
 770
 771 static DEFINE_SPINLOCK(dma_spin_lock);
 772
 773 #define claim_dma_lock() \
 774 ({      unsigned long flags; \
 775         spin_lock_irqsave(&dma_spin_lock, flags); \
 776         flags; \
 777 })
 778
 779 #define release_dma_lock(__flags) \
 780         spin_unlock_irqrestore(&dma_spin_lock, __flags);
 781
 782 #endif /* !(__ASM_SPARC64_FLOPPY_H) */