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