[SPARC64]: Use in-kernel PROM tree for EBUS and ISA.
[linux-2.6.git] / include / asm-sparc64 / floppy.h
1 /* $Id: floppy.h,v 1.32 2001/10/26 17:59:36 davem Exp $
2  * asm-sparc64/floppy.h: Sparc specific parts of the Floppy driver.
3  *
4  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5  * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6  *
7  * Ultra/PCI support added: Sep 1997  Eddie C. Dost  (ecd@skynet.be)
8  */
9
10 #ifndef __ASM_SPARC64_FLOPPY_H
11 #define __ASM_SPARC64_FLOPPY_H
12
13 #include <linux/init.h>
14
15 #include <asm/page.h>
16 #include <asm/pgtable.h>
17 #include <asm/system.h>
18 #include <asm/idprom.h>
19 #include <asm/oplib.h>
20 #include <asm/auxio.h>
21 #include <asm/sbus.h>
22 #include <asm/irq.h>
23
24
25 /*
26  * Define this to enable exchanging drive 0 and 1 if only drive 1 is
27  * probed on PCI machines.
28  */
29 #undef PCI_FDC_SWAP_DRIVES
30
31
32 /* References:
33  * 1) Netbsd Sun floppy driver.
34  * 2) NCR 82077 controller manual
35  * 3) Intel 82077 controller manual
36  */
37 struct sun_flpy_controller {
38         volatile unsigned char status1_82077; /* Auxiliary Status reg. 1 */
39         volatile unsigned char status2_82077; /* Auxiliary Status reg. 2 */
40         volatile unsigned char dor_82077;     /* Digital Output reg. */
41         volatile unsigned char tapectl_82077; /* Tape Control reg */
42         volatile unsigned char status_82077;  /* Main Status Register. */
43 #define drs_82077              status_82077   /* Digital Rate Select reg. */
44         volatile unsigned char data_82077;    /* Data fifo. */
45         volatile unsigned char ___unused;
46         volatile unsigned char dir_82077;     /* Digital Input reg. */
47 #define dcr_82077              dir_82077      /* Config Control reg. */
48 };
49
50 /* You'll only ever find one controller on an Ultra anyways. */
51 static struct sun_flpy_controller *sun_fdc = (struct sun_flpy_controller *)-1;
52 unsigned long fdc_status;
53 static struct sbus_dev *floppy_sdev = NULL;
54
55 struct sun_floppy_ops {
56         unsigned char   (*fd_inb) (unsigned long port);
57         void            (*fd_outb) (unsigned char value, unsigned long port);
58         void            (*fd_enable_dma) (void);
59         void            (*fd_disable_dma) (void);
60         void            (*fd_set_dma_mode) (int);
61         void            (*fd_set_dma_addr) (char *);
62         void            (*fd_set_dma_count) (int);
63         unsigned int    (*get_dma_residue) (void);
64         int             (*fd_request_irq) (void);
65         void            (*fd_free_irq) (void);
66         int             (*fd_eject) (int);
67 };
68
69 static struct sun_floppy_ops sun_fdops;
70
71 #define fd_inb(port)              sun_fdops.fd_inb(port)
72 #define fd_outb(value,port)       sun_fdops.fd_outb(value,port)
73 #define fd_enable_dma()           sun_fdops.fd_enable_dma()
74 #define fd_disable_dma()          sun_fdops.fd_disable_dma()
75 #define fd_request_dma()          (0) /* nothing... */
76 #define fd_free_dma()             /* nothing... */
77 #define fd_clear_dma_ff()         /* nothing... */
78 #define fd_set_dma_mode(mode)     sun_fdops.fd_set_dma_mode(mode)
79 #define fd_set_dma_addr(addr)     sun_fdops.fd_set_dma_addr(addr)
80 #define fd_set_dma_count(count)   sun_fdops.fd_set_dma_count(count)
81 #define get_dma_residue(x)        sun_fdops.get_dma_residue()
82 #define fd_cacheflush(addr, size) /* nothing... */
83 #define fd_request_irq()          sun_fdops.fd_request_irq()
84 #define fd_free_irq()             sun_fdops.fd_free_irq()
85 #define fd_eject(drive)           sun_fdops.fd_eject(drive)
86
87 static int FLOPPY_MOTOR_MASK = 0x10;
88
89 /* Super paranoid... */
90 #undef HAVE_DISABLE_HLT
91
92 static int sun_floppy_types[2] = { 0, 0 };
93
94 /* Here is where we catch the floppy driver trying to initialize,
95  * therefore this is where we call the PROM device tree probing
96  * routine etc. on the Sparc.
97  */
98 #define FLOPPY0_TYPE            sun_floppy_init()
99 #define FLOPPY1_TYPE            sun_floppy_types[1]
100
101 #define FDC1                    ((unsigned long)sun_fdc)
102
103 #define N_FDC    1
104 #define N_DRIVE  8
105
106 /* No 64k boundary crossing problems on the Sparc. */
107 #define CROSS_64KB(a,s) (0)
108
109 static unsigned char sun_82077_fd_inb(unsigned long port)
110 {
111         udelay(5);
112         switch(port & 7) {
113         default:
114                 printk("floppy: Asked to read unknown port %lx\n", port);
115                 panic("floppy: Port bolixed.");
116         case 4: /* FD_STATUS */
117                 return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA;
118         case 5: /* FD_DATA */
119                 return sbus_readb(&sun_fdc->data_82077);
120         case 7: /* FD_DIR */
121                 /* XXX: Is DCL on 0x80 in sun4m? */
122                 return sbus_readb(&sun_fdc->dir_82077);
123         };
124         panic("sun_82072_fd_inb: How did I get here?");
125 }
126
127 static void sun_82077_fd_outb(unsigned char value, unsigned long port)
128 {
129         udelay(5);
130         switch(port & 7) {
131         default:
132                 printk("floppy: Asked to write to unknown port %lx\n", port);
133                 panic("floppy: Port bolixed.");
134         case 2: /* FD_DOR */
135                 /* Happily, the 82077 has a real DOR register. */
136                 sbus_writeb(value, &sun_fdc->dor_82077);
137                 break;
138         case 5: /* FD_DATA */
139                 sbus_writeb(value, &sun_fdc->data_82077);
140                 break;
141         case 7: /* FD_DCR */
142                 sbus_writeb(value, &sun_fdc->dcr_82077);
143                 break;
144         case 4: /* FD_STATUS */
145                 sbus_writeb(value, &sun_fdc->status_82077);
146                 break;
147         };
148         return;
149 }
150
151 /* For pseudo-dma (Sun floppy drives have no real DMA available to
152  * them so we must eat the data fifo bytes directly ourselves) we have
153  * three state variables.  doing_pdma tells our inline low-level
154  * assembly floppy interrupt entry point whether it should sit and eat
155  * bytes from the fifo or just transfer control up to the higher level
156  * floppy interrupt c-code.  I tried very hard but I could not get the
157  * pseudo-dma to work in c-code without getting many overruns and
158  * underruns.  If non-zero, doing_pdma encodes the direction of
159  * the transfer for debugging.  1=read 2=write
160  */
161 unsigned char *pdma_vaddr;
162 unsigned long pdma_size;
163 volatile int doing_pdma = 0;
164
165 /* This is software state */
166 char *pdma_base = NULL;
167 unsigned long pdma_areasize;
168
169 /* Common routines to all controller types on the Sparc. */
170 static void sun_fd_disable_dma(void)
171 {
172         doing_pdma = 0;
173         if (pdma_base) {
174                 mmu_unlockarea(pdma_base, pdma_areasize);
175                 pdma_base = NULL;
176         }
177 }
178
179 static void sun_fd_set_dma_mode(int mode)
180 {
181         switch(mode) {
182         case DMA_MODE_READ:
183                 doing_pdma = 1;
184                 break;
185         case DMA_MODE_WRITE:
186                 doing_pdma = 2;
187                 break;
188         default:
189                 printk("Unknown dma mode %d\n", mode);
190                 panic("floppy: Giving up...");
191         }
192 }
193
194 static void sun_fd_set_dma_addr(char *buffer)
195 {
196         pdma_vaddr = buffer;
197 }
198
199 static void sun_fd_set_dma_count(int length)
200 {
201         pdma_size = length;
202 }
203
204 static void sun_fd_enable_dma(void)
205 {
206         pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size);
207         pdma_base = pdma_vaddr;
208         pdma_areasize = pdma_size;
209 }
210
211 extern irqreturn_t sparc_floppy_irq(int, void *, struct pt_regs *);
212
213 static int sun_fd_request_irq(void)
214 {
215         static int once = 0;
216         int error;
217
218         if(!once) {
219                 once = 1;
220
221                 error = request_irq(FLOPPY_IRQ, sparc_floppy_irq, 
222                                     SA_INTERRUPT, "floppy", NULL);
223
224                 return ((error == 0) ? 0 : -1);
225         }
226         return 0;
227 }
228
229 static void sun_fd_free_irq(void)
230 {
231 }
232
233 static unsigned int sun_get_dma_residue(void)
234 {
235         /* XXX This isn't really correct. XXX */
236         return 0;
237 }
238
239 static int sun_fd_eject(int drive)
240 {
241         set_dor(0x00, 0xff, 0x90);
242         udelay(500);
243         set_dor(0x00, 0x6f, 0x00);
244         udelay(500);
245         return 0;
246 }
247
248 #ifdef CONFIG_PCI
249 #include <asm/ebus.h>
250 #include <asm/isa.h>
251 #include <asm/ns87303.h>
252
253 static struct ebus_dma_info sun_pci_fd_ebus_dma;
254 static struct pci_dev *sun_pci_ebus_dev;
255 static int sun_pci_broken_drive = -1;
256
257 struct sun_pci_dma_op {
258         unsigned int    addr;
259         int             len;
260         int             direction;
261         char            *buf;
262 };
263 static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL};
264 static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL};
265
266 extern irqreturn_t floppy_interrupt(int irq, void *dev_id, struct pt_regs *regs);
267
268 static unsigned char sun_pci_fd_inb(unsigned long port)
269 {
270         udelay(5);
271         return inb(port);
272 }
273
274 static void sun_pci_fd_outb(unsigned char val, unsigned long port)
275 {
276         udelay(5);
277         outb(val, port);
278 }
279
280 static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port)
281 {
282         udelay(5);
283         /*
284          * XXX: Due to SUN's broken floppy connector on AX and AXi
285          *      we need to turn on MOTOR_0 also, if the floppy is
286          *      jumpered to DS1 (like most PC floppies are). I hope
287          *      this does not hurt correct hardware like the AXmp.
288          *      (Eddie, Sep 12 1998).
289          */
290         if (port == ((unsigned long)sun_fdc) + 2) {
291                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
292                         val |= 0x10;
293                 }
294         }
295         outb(val, port);
296 }
297
298 #ifdef PCI_FDC_SWAP_DRIVES
299 static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port)
300 {
301         udelay(5);
302         /*
303          * XXX: Due to SUN's broken floppy connector on AX and AXi
304          *      we need to turn on MOTOR_0 also, if the floppy is
305          *      jumpered to DS1 (like most PC floppies are). I hope
306          *      this does not hurt correct hardware like the AXmp.
307          *      (Eddie, Sep 12 1998).
308          */
309         if (port == ((unsigned long)sun_fdc) + 2) {
310                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
311                         val &= ~(0x03);
312                         val |= 0x21;
313                 }
314         }
315         outb(val, port);
316 }
317 #endif /* PCI_FDC_SWAP_DRIVES */
318
319 static void sun_pci_fd_enable_dma(void)
320 {
321         BUG_ON((NULL == sun_pci_dma_pending.buf)        ||
322             (0    == sun_pci_dma_pending.len)   ||
323             (0    == sun_pci_dma_pending.direction));
324
325         sun_pci_dma_current.buf = sun_pci_dma_pending.buf;
326         sun_pci_dma_current.len = sun_pci_dma_pending.len;
327         sun_pci_dma_current.direction = sun_pci_dma_pending.direction;
328
329         sun_pci_dma_pending.buf  = NULL;
330         sun_pci_dma_pending.len  = 0;
331         sun_pci_dma_pending.direction = 0;
332         sun_pci_dma_pending.addr = -1U;
333
334         sun_pci_dma_current.addr = 
335                 pci_map_single(sun_pci_ebus_dev,
336                                sun_pci_dma_current.buf,
337                                sun_pci_dma_current.len,
338                                sun_pci_dma_current.direction);
339
340         ebus_dma_enable(&sun_pci_fd_ebus_dma, 1);
341
342         if (ebus_dma_request(&sun_pci_fd_ebus_dma,
343                              sun_pci_dma_current.addr,
344                              sun_pci_dma_current.len))
345                 BUG();
346 }
347
348 static void sun_pci_fd_disable_dma(void)
349 {
350         ebus_dma_enable(&sun_pci_fd_ebus_dma, 0);
351         if (sun_pci_dma_current.addr != -1U)
352                 pci_unmap_single(sun_pci_ebus_dev,
353                                  sun_pci_dma_current.addr,
354                                  sun_pci_dma_current.len,
355                                  sun_pci_dma_current.direction);
356         sun_pci_dma_current.addr = -1U;
357 }
358
359 static void sun_pci_fd_set_dma_mode(int mode)
360 {
361         if (mode == DMA_MODE_WRITE)
362                 sun_pci_dma_pending.direction = PCI_DMA_TODEVICE;
363         else
364                 sun_pci_dma_pending.direction = PCI_DMA_FROMDEVICE;
365
366         ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE);
367 }
368
369 static void sun_pci_fd_set_dma_count(int length)
370 {
371         sun_pci_dma_pending.len = length;
372 }
373
374 static void sun_pci_fd_set_dma_addr(char *buffer)
375 {
376         sun_pci_dma_pending.buf = buffer;
377 }
378
379 static unsigned int sun_pci_get_dma_residue(void)
380 {
381         return ebus_dma_residue(&sun_pci_fd_ebus_dma);
382 }
383
384 static int sun_pci_fd_request_irq(void)
385 {
386         return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1);
387 }
388
389 static void sun_pci_fd_free_irq(void)
390 {
391         ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0);
392 }
393
394 static int sun_pci_fd_eject(int drive)
395 {
396         return -EINVAL;
397 }
398
399 void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie)
400 {
401         floppy_interrupt(0, NULL, NULL);
402 }
403
404 /*
405  * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI,
406  * even if this is configured using DS1, thus looks like /dev/fd1 with
407  * the cabling used in Ultras.
408  */
409 #define DOR     (port + 2)
410 #define MSR     (port + 4)
411 #define FIFO    (port + 5)
412
413 static void sun_pci_fd_out_byte(unsigned long port, unsigned char val,
414                                 unsigned long reg)
415 {
416         unsigned char status;
417         int timeout = 1000;
418
419         while (!((status = inb(MSR)) & 0x80) && --timeout)
420                 udelay(100);
421         outb(val, reg);
422 }
423
424 static unsigned char sun_pci_fd_sensei(unsigned long port)
425 {
426         unsigned char result[2] = { 0x70, 0x00 };
427         unsigned char status;
428         int i = 0;
429
430         sun_pci_fd_out_byte(port, 0x08, FIFO);
431         do {
432                 int timeout = 1000;
433
434                 while (!((status = inb(MSR)) & 0x80) && --timeout)
435                         udelay(100);
436
437                 if (!timeout)
438                         break;
439
440                 if ((status & 0xf0) == 0xd0)
441                         result[i++] = inb(FIFO);
442                 else
443                         break;
444         } while (i < 2);
445
446         return result[0];
447 }
448
449 static void sun_pci_fd_reset(unsigned long port)
450 {
451         unsigned char mask = 0x00;
452         unsigned char status;
453         int timeout = 10000;
454
455         outb(0x80, MSR);
456         do {
457                 status = sun_pci_fd_sensei(port);
458                 if ((status & 0xc0) == 0xc0)
459                         mask |= 1 << (status & 0x03);
460                 else
461                         udelay(100);
462         } while ((mask != 0x0f) && --timeout);
463 }
464
465 static int sun_pci_fd_test_drive(unsigned long port, int drive)
466 {
467         unsigned char status, data;
468         int timeout = 1000;
469         int ready;
470
471         sun_pci_fd_reset(port);
472
473         data = (0x10 << drive) | 0x0c | drive;
474         sun_pci_fd_out_byte(port, data, DOR);
475
476         sun_pci_fd_out_byte(port, 0x07, FIFO);
477         sun_pci_fd_out_byte(port, drive & 0x03, FIFO);
478
479         do {
480                 udelay(100);
481                 status = sun_pci_fd_sensei(port);
482         } while (((status & 0xc0) == 0x80) && --timeout);
483
484         if (!timeout)
485                 ready = 0;
486         else
487                 ready = (status & 0x10) ? 0 : 1;
488
489         sun_pci_fd_reset(port);
490         return ready;
491 }
492 #undef FIFO
493 #undef MSR
494 #undef DOR
495
496 #endif /* CONFIG_PCI */
497
498 #ifdef CONFIG_PCI
499 static int __init ebus_fdthree_p(struct linux_ebus_device *edev)
500 {
501         if (!strcmp(edev->prom_node->name, "fdthree"))
502                 return 1;
503         if (!strcmp(edev->prom_node->name, "floppy")) {
504                 char *compat;
505
506                 compat = of_get_property(edev->prom_node,
507                                          "compatible", NULL);
508                 if (compat && !strcmp(compat, "fdthree"))
509                         return 1;
510         }
511         return 0;
512 }
513 #endif
514
515 #ifdef CONFIG_PCI
516 #undef ISA_FLOPPY_WORKS
517
518 #ifdef ISA_FLOPPY_WORKS
519 static unsigned long __init isa_floppy_init(void)
520 {
521         struct sparc_isa_bridge *isa_br;
522         struct sparc_isa_device *isa_dev = NULL;
523
524         for_each_isa(isa_br) {
525                 for_each_isadev(isa_dev, isa_br) {
526                         if (!strcmp(isa_dev->prom_node->name, "dma")) {
527                                 struct sparc_isa_device *child =
528                                         isa_dev->child;
529
530                                 while (child) {
531                                         if (!strcmp(child->prom_node->name,
532                                                     "floppy")) {
533                                                 isa_dev = child;
534                                                 goto isa_done;
535                                         }
536                                         child = child->next;
537                                 }
538                         }
539                 }
540         }
541 isa_done:
542         if (!isa_dev)
543                 return 0;
544
545         /* We could use DMA on devices behind the ISA bridge, but...
546          *
547          * There is a slight problem.  Normally on x86 kit the x86 processor
548          * delays I/O port instructions when the ISA bus "dma in progress"
549          * signal is active.  Well, sparc64 systems do not monitor this
550          * signal thus we would need to block all I/O port accesses in software
551          * when a dma transfer is active for some device.
552          */
553
554         sun_fdc = (struct sun_flpy_controller *)isa_dev->resource.start;
555         FLOPPY_IRQ = isa_dev->irq;
556
557         sun_fdops.fd_inb = sun_pci_fd_inb;
558         sun_fdops.fd_outb = sun_pci_fd_outb;
559
560         can_use_virtual_dma = use_virtual_dma = 1;
561         sun_fdops.fd_enable_dma = sun_fd_enable_dma;
562         sun_fdops.fd_disable_dma = sun_fd_disable_dma;
563         sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
564         sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
565         sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
566         sun_fdops.get_dma_residue = sun_get_dma_residue;
567
568         sun_fdops.fd_request_irq = sun_fd_request_irq;
569         sun_fdops.fd_free_irq = sun_fd_free_irq;
570
571         /* Floppy eject is manual.   Actually, could determine this
572          * via presence of 'manual' property in OBP node.
573          */
574         sun_fdops.fd_eject = sun_pci_fd_eject;
575
576         fdc_status = (unsigned long) &sun_fdc->status_82077;
577         FLOPPY_MOTOR_MASK = 0xf0;
578
579         allowed_drive_mask = 0;
580         sun_floppy_types[0] = 0;
581         sun_floppy_types[1] = 4;
582
583         sun_pci_broken_drive = 1;
584         sun_fdops.fd_outb = sun_pci_fd_broken_outb;
585
586         return sun_floppy_types[0];
587 }
588 #endif /* ISA_FLOPPY_WORKS */
589
590 #endif
591
592 static unsigned long __init sun_floppy_init(void)
593 {
594         char state[128];
595         struct sbus_bus *bus;
596         struct sbus_dev *sdev = NULL;
597         static int initialized = 0;
598
599         if (initialized)
600                 return sun_floppy_types[0];
601         initialized = 1;
602
603         for_all_sbusdev (sdev, bus) {
604                 if (!strcmp(sdev->prom_name, "SUNW,fdtwo")) 
605                         break;
606         }
607         if(sdev) {
608                 floppy_sdev = sdev;
609                 FLOPPY_IRQ = sdev->irqs[0];
610         } else {
611 #ifdef CONFIG_PCI
612                 struct linux_ebus *ebus;
613                 struct linux_ebus_device *edev = NULL;
614                 unsigned long config = 0;
615                 void __iomem *auxio_reg;
616                 char *state_prop;
617
618                 for_each_ebus(ebus) {
619                         for_each_ebusdev(edev, ebus) {
620                                 if (ebus_fdthree_p(edev))
621                                         goto ebus_done;
622                         }
623                 }
624         ebus_done:
625                 if (!edev) {
626 #ifdef ISA_FLOPPY_WORKS
627                         return isa_floppy_init();
628 #else
629                         return 0;
630 #endif
631                 }
632
633                 state_prop = of_get_property(edev->prom_node, "status", NULL);
634                 if (state_prop && !strncmp(state_prop, "disabled", 8))
635                         return 0;
636                         
637                 FLOPPY_IRQ = edev->irqs[0];
638
639                 /* Make sure the high density bit is set, some systems
640                  * (most notably Ultra5/Ultra10) come up with it clear.
641                  */
642                 auxio_reg = (void __iomem *) edev->resource[2].start;
643                 writel(readl(auxio_reg)|0x2, auxio_reg);
644
645                 sun_pci_ebus_dev = ebus->self;
646
647                 spin_lock_init(&sun_pci_fd_ebus_dma.lock);
648
649                 /* XXX ioremap */
650                 sun_pci_fd_ebus_dma.regs = (void __iomem *)
651                         edev->resource[1].start;
652                 if (!sun_pci_fd_ebus_dma.regs)
653                         return 0;
654
655                 sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER |
656                                              EBUS_DMA_FLAG_TCI_DISABLE);
657                 sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback;
658                 sun_pci_fd_ebus_dma.client_cookie = NULL;
659                 sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ;
660                 strcpy(sun_pci_fd_ebus_dma.name, "floppy");
661                 if (ebus_dma_register(&sun_pci_fd_ebus_dma))
662                         return 0;
663
664                 /* XXX ioremap */
665                 sun_fdc = (struct sun_flpy_controller *)edev->resource[0].start;
666
667                 sun_fdops.fd_inb = sun_pci_fd_inb;
668                 sun_fdops.fd_outb = sun_pci_fd_outb;
669
670                 can_use_virtual_dma = use_virtual_dma = 0;
671                 sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma;
672                 sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma;
673                 sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode;
674                 sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr;
675                 sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count;
676                 sun_fdops.get_dma_residue = sun_pci_get_dma_residue;
677
678                 sun_fdops.fd_request_irq = sun_pci_fd_request_irq;
679                 sun_fdops.fd_free_irq = sun_pci_fd_free_irq;
680
681                 sun_fdops.fd_eject = sun_pci_fd_eject;
682
683                 fdc_status = (unsigned long) &sun_fdc->status_82077;
684                 FLOPPY_MOTOR_MASK = 0xf0;
685
686                 /*
687                  * XXX: Find out on which machines this is really needed.
688                  */
689                 if (1) {
690                         sun_pci_broken_drive = 1;
691                         sun_fdops.fd_outb = sun_pci_fd_broken_outb;
692                 }
693
694                 allowed_drive_mask = 0;
695                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0))
696                         sun_floppy_types[0] = 4;
697                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1))
698                         sun_floppy_types[1] = 4;
699
700                 /*
701                  * Find NS87303 SuperIO config registers (through ecpp).
702                  */
703                 for_each_ebus(ebus) {
704                         for_each_ebusdev(edev, ebus) {
705                                 if (!strcmp(edev->prom_node->name, "ecpp")) {
706                                         config = edev->resource[1].start;
707                                         goto config_done;
708                                 }
709                         }
710                 }
711         config_done:
712
713                 /*
714                  * Sanity check, is this really the NS87303?
715                  */
716                 switch (config & 0x3ff) {
717                 case 0x02e:
718                 case 0x15c:
719                 case 0x26e:
720                 case 0x398:
721                         break;
722                 default:
723                         config = 0;
724                 }
725
726                 if (!config)
727                         return sun_floppy_types[0];
728
729                 /* Enable PC-AT mode. */
730                 ns87303_modify(config, ASC, 0, 0xc0);
731
732 #ifdef PCI_FDC_SWAP_DRIVES
733                 /*
734                  * If only Floppy 1 is present, swap drives.
735                  */
736                 if (!sun_floppy_types[0] && sun_floppy_types[1]) {
737                         /*
738                          * Set the drive exchange bit in FCR on NS87303,
739                          * make sure other bits are sane before doing so.
740                          */
741                         ns87303_modify(config, FER, FER_EDM, 0);
742                         ns87303_modify(config, ASC, ASC_DRV2_SEL, 0);
743                         ns87303_modify(config, FCR, 0, FCR_LDE);
744
745                         config = sun_floppy_types[0];
746                         sun_floppy_types[0] = sun_floppy_types[1];
747                         sun_floppy_types[1] = config;
748
749                         if (sun_pci_broken_drive != -1) {
750                                 sun_pci_broken_drive = 1 - sun_pci_broken_drive;
751                                 sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb;
752                         }
753                 }
754 #endif /* PCI_FDC_SWAP_DRIVES */
755
756                 return sun_floppy_types[0];
757 #else
758                 return 0;
759 #endif
760         }
761         prom_getproperty(sdev->prom_node, "status", state, sizeof(state));
762         if(!strncmp(state, "disabled", 8))
763                 return 0;
764
765         /*
766          * We cannot do sbus_ioremap here: it does request_region,
767          * which the generic floppy driver tries to do once again.
768          * But we must use the sdev resource values as they have
769          * had parent ranges applied.
770          */
771         sun_fdc = (struct sun_flpy_controller *)
772                 (sdev->resource[0].start +
773                  ((sdev->resource[0].flags & 0x1ffUL) << 32UL));
774
775         /* Last minute sanity check... */
776         if(sbus_readb(&sun_fdc->status1_82077) == 0xff) {
777                 sun_fdc = (struct sun_flpy_controller *)-1;
778                 return 0;
779         }
780
781         sun_fdops.fd_inb = sun_82077_fd_inb;
782         sun_fdops.fd_outb = sun_82077_fd_outb;
783
784         can_use_virtual_dma = use_virtual_dma = 1;
785         sun_fdops.fd_enable_dma = sun_fd_enable_dma;
786         sun_fdops.fd_disable_dma = sun_fd_disable_dma;
787         sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
788         sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
789         sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
790         sun_fdops.get_dma_residue = sun_get_dma_residue;
791
792         sun_fdops.fd_request_irq = sun_fd_request_irq;
793         sun_fdops.fd_free_irq = sun_fd_free_irq;
794
795         sun_fdops.fd_eject = sun_fd_eject;
796
797         fdc_status = (unsigned long) &sun_fdc->status_82077;
798
799         /* Success... */
800         allowed_drive_mask = 0x01;
801         sun_floppy_types[0] = 4;
802         sun_floppy_types[1] = 0;
803
804         return sun_floppy_types[0];
805 }
806
807 #define EXTRA_FLOPPY_PARAMS
808
809 #endif /* !(__ASM_SPARC64_FLOPPY_H) */