4aa0925e1b1b6b784bf83850deb28a0be5b5e449
[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 irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie)
212 {
213         if (likely(doing_pdma)) {
214                 void __iomem *stat = (void __iomem *) fdc_status;
215                 unsigned char *vaddr = pdma_vaddr;
216                 unsigned long size = pdma_size;
217                 u8 val;
218
219                 while (size) {
220                         val = readb(stat);
221                         if (unlikely(!(val & 0x80))) {
222                                 pdma_vaddr = vaddr;
223                                 pdma_size = size;
224                                 return IRQ_HANDLED;
225                         }
226                         if (unlikely(!(val & 0x20))) {
227                                 pdma_vaddr = vaddr;
228                                 pdma_size = size;
229                                 doing_pdma = 0;
230                                 goto main_interrupt;
231                         }
232                         if (val & 0x40) {
233                                 /* read */
234                                 *vaddr++ = readb(stat + 1);
235                         } else {
236                                 unsigned char data = *vaddr++;
237
238                                 /* write */
239                                 writeb(data, stat + 1);
240                         }
241                         size--;
242                 }
243
244                 pdma_vaddr = vaddr;
245                 pdma_size = size;
246
247                 /* Send Terminal Count pulse to floppy controller. */
248                 val = readb(auxio_register);
249                 val |= AUXIO_AUX1_FTCNT;
250                 writeb(val, auxio_register);
251                 val &= ~AUXIO_AUX1_FTCNT;
252                 writeb(val, auxio_register);
253
254                 doing_pdma = 0;
255         }
256
257 main_interrupt:
258         return floppy_interrupt(irq, dev_cookie);
259 }
260
261 static int sun_fd_request_irq(void)
262 {
263         static int once = 0;
264         int error;
265
266         if(!once) {
267                 once = 1;
268
269                 error = request_irq(FLOPPY_IRQ, sparc_floppy_irq, 
270                                     IRQF_DISABLED, "floppy", NULL);
271
272                 return ((error == 0) ? 0 : -1);
273         }
274         return 0;
275 }
276
277 static void sun_fd_free_irq(void)
278 {
279 }
280
281 static unsigned int sun_get_dma_residue(void)
282 {
283         /* XXX This isn't really correct. XXX */
284         return 0;
285 }
286
287 static int sun_fd_eject(int drive)
288 {
289         set_dor(0x00, 0xff, 0x90);
290         udelay(500);
291         set_dor(0x00, 0x6f, 0x00);
292         udelay(500);
293         return 0;
294 }
295
296 #ifdef CONFIG_PCI
297 #include <asm/ebus.h>
298 #include <asm/isa.h>
299 #include <asm/ns87303.h>
300
301 static struct ebus_dma_info sun_pci_fd_ebus_dma;
302 static struct pci_dev *sun_pci_ebus_dev;
303 static int sun_pci_broken_drive = -1;
304
305 struct sun_pci_dma_op {
306         unsigned int    addr;
307         int             len;
308         int             direction;
309         char            *buf;
310 };
311 static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL};
312 static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL};
313
314 extern irqreturn_t floppy_interrupt(int irq, void *dev_id);
315
316 static unsigned char sun_pci_fd_inb(unsigned long port)
317 {
318         udelay(5);
319         return inb(port);
320 }
321
322 static void sun_pci_fd_outb(unsigned char val, unsigned long port)
323 {
324         udelay(5);
325         outb(val, port);
326 }
327
328 static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port)
329 {
330         udelay(5);
331         /*
332          * XXX: Due to SUN's broken floppy connector on AX and AXi
333          *      we need to turn on MOTOR_0 also, if the floppy is
334          *      jumpered to DS1 (like most PC floppies are). I hope
335          *      this does not hurt correct hardware like the AXmp.
336          *      (Eddie, Sep 12 1998).
337          */
338         if (port == ((unsigned long)sun_fdc) + 2) {
339                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
340                         val |= 0x10;
341                 }
342         }
343         outb(val, port);
344 }
345
346 #ifdef PCI_FDC_SWAP_DRIVES
347 static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port)
348 {
349         udelay(5);
350         /*
351          * XXX: Due to SUN's broken floppy connector on AX and AXi
352          *      we need to turn on MOTOR_0 also, if the floppy is
353          *      jumpered to DS1 (like most PC floppies are). I hope
354          *      this does not hurt correct hardware like the AXmp.
355          *      (Eddie, Sep 12 1998).
356          */
357         if (port == ((unsigned long)sun_fdc) + 2) {
358                 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
359                         val &= ~(0x03);
360                         val |= 0x21;
361                 }
362         }
363         outb(val, port);
364 }
365 #endif /* PCI_FDC_SWAP_DRIVES */
366
367 static void sun_pci_fd_enable_dma(void)
368 {
369         BUG_ON((NULL == sun_pci_dma_pending.buf)        ||
370             (0    == sun_pci_dma_pending.len)   ||
371             (0    == sun_pci_dma_pending.direction));
372
373         sun_pci_dma_current.buf = sun_pci_dma_pending.buf;
374         sun_pci_dma_current.len = sun_pci_dma_pending.len;
375         sun_pci_dma_current.direction = sun_pci_dma_pending.direction;
376
377         sun_pci_dma_pending.buf  = NULL;
378         sun_pci_dma_pending.len  = 0;
379         sun_pci_dma_pending.direction = 0;
380         sun_pci_dma_pending.addr = -1U;
381
382         sun_pci_dma_current.addr = 
383                 pci_map_single(sun_pci_ebus_dev,
384                                sun_pci_dma_current.buf,
385                                sun_pci_dma_current.len,
386                                sun_pci_dma_current.direction);
387
388         ebus_dma_enable(&sun_pci_fd_ebus_dma, 1);
389
390         if (ebus_dma_request(&sun_pci_fd_ebus_dma,
391                              sun_pci_dma_current.addr,
392                              sun_pci_dma_current.len))
393                 BUG();
394 }
395
396 static void sun_pci_fd_disable_dma(void)
397 {
398         ebus_dma_enable(&sun_pci_fd_ebus_dma, 0);
399         if (sun_pci_dma_current.addr != -1U)
400                 pci_unmap_single(sun_pci_ebus_dev,
401                                  sun_pci_dma_current.addr,
402                                  sun_pci_dma_current.len,
403                                  sun_pci_dma_current.direction);
404         sun_pci_dma_current.addr = -1U;
405 }
406
407 static void sun_pci_fd_set_dma_mode(int mode)
408 {
409         if (mode == DMA_MODE_WRITE)
410                 sun_pci_dma_pending.direction = PCI_DMA_TODEVICE;
411         else
412                 sun_pci_dma_pending.direction = PCI_DMA_FROMDEVICE;
413
414         ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE);
415 }
416
417 static void sun_pci_fd_set_dma_count(int length)
418 {
419         sun_pci_dma_pending.len = length;
420 }
421
422 static void sun_pci_fd_set_dma_addr(char *buffer)
423 {
424         sun_pci_dma_pending.buf = buffer;
425 }
426
427 static unsigned int sun_pci_get_dma_residue(void)
428 {
429         return ebus_dma_residue(&sun_pci_fd_ebus_dma);
430 }
431
432 static int sun_pci_fd_request_irq(void)
433 {
434         return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1);
435 }
436
437 static void sun_pci_fd_free_irq(void)
438 {
439         ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0);
440 }
441
442 static int sun_pci_fd_eject(int drive)
443 {
444         return -EINVAL;
445 }
446
447 void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie)
448 {
449         floppy_interrupt(0, NULL);
450 }
451
452 /*
453  * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI,
454  * even if this is configured using DS1, thus looks like /dev/fd1 with
455  * the cabling used in Ultras.
456  */
457 #define DOR     (port + 2)
458 #define MSR     (port + 4)
459 #define FIFO    (port + 5)
460
461 static void sun_pci_fd_out_byte(unsigned long port, unsigned char val,
462                                 unsigned long reg)
463 {
464         unsigned char status;
465         int timeout = 1000;
466
467         while (!((status = inb(MSR)) & 0x80) && --timeout)
468                 udelay(100);
469         outb(val, reg);
470 }
471
472 static unsigned char sun_pci_fd_sensei(unsigned long port)
473 {
474         unsigned char result[2] = { 0x70, 0x00 };
475         unsigned char status;
476         int i = 0;
477
478         sun_pci_fd_out_byte(port, 0x08, FIFO);
479         do {
480                 int timeout = 1000;
481
482                 while (!((status = inb(MSR)) & 0x80) && --timeout)
483                         udelay(100);
484
485                 if (!timeout)
486                         break;
487
488                 if ((status & 0xf0) == 0xd0)
489                         result[i++] = inb(FIFO);
490                 else
491                         break;
492         } while (i < 2);
493
494         return result[0];
495 }
496
497 static void sun_pci_fd_reset(unsigned long port)
498 {
499         unsigned char mask = 0x00;
500         unsigned char status;
501         int timeout = 10000;
502
503         outb(0x80, MSR);
504         do {
505                 status = sun_pci_fd_sensei(port);
506                 if ((status & 0xc0) == 0xc0)
507                         mask |= 1 << (status & 0x03);
508                 else
509                         udelay(100);
510         } while ((mask != 0x0f) && --timeout);
511 }
512
513 static int sun_pci_fd_test_drive(unsigned long port, int drive)
514 {
515         unsigned char status, data;
516         int timeout = 1000;
517         int ready;
518
519         sun_pci_fd_reset(port);
520
521         data = (0x10 << drive) | 0x0c | drive;
522         sun_pci_fd_out_byte(port, data, DOR);
523
524         sun_pci_fd_out_byte(port, 0x07, FIFO);
525         sun_pci_fd_out_byte(port, drive & 0x03, FIFO);
526
527         do {
528                 udelay(100);
529                 status = sun_pci_fd_sensei(port);
530         } while (((status & 0xc0) == 0x80) && --timeout);
531
532         if (!timeout)
533                 ready = 0;
534         else
535                 ready = (status & 0x10) ? 0 : 1;
536
537         sun_pci_fd_reset(port);
538         return ready;
539 }
540 #undef FIFO
541 #undef MSR
542 #undef DOR
543
544 #endif /* CONFIG_PCI */
545
546 #ifdef CONFIG_PCI
547 static int __init ebus_fdthree_p(struct linux_ebus_device *edev)
548 {
549         if (!strcmp(edev->prom_node->name, "fdthree"))
550                 return 1;
551         if (!strcmp(edev->prom_node->name, "floppy")) {
552                 const char *compat;
553
554                 compat = of_get_property(edev->prom_node,
555                                          "compatible", NULL);
556                 if (compat && !strcmp(compat, "fdthree"))
557                         return 1;
558         }
559         return 0;
560 }
561 #endif
562
563 #ifdef CONFIG_PCI
564 #undef ISA_FLOPPY_WORKS
565
566 #ifdef ISA_FLOPPY_WORKS
567 static unsigned long __init isa_floppy_init(void)
568 {
569         struct sparc_isa_bridge *isa_br;
570         struct sparc_isa_device *isa_dev = NULL;
571
572         for_each_isa(isa_br) {
573                 for_each_isadev(isa_dev, isa_br) {
574                         if (!strcmp(isa_dev->prom_node->name, "dma")) {
575                                 struct sparc_isa_device *child =
576                                         isa_dev->child;
577
578                                 while (child) {
579                                         if (!strcmp(child->prom_node->name,
580                                                     "floppy")) {
581                                                 isa_dev = child;
582                                                 goto isa_done;
583                                         }
584                                         child = child->next;
585                                 }
586                         }
587                 }
588         }
589 isa_done:
590         if (!isa_dev)
591                 return 0;
592
593         /* We could use DMA on devices behind the ISA bridge, but...
594          *
595          * There is a slight problem.  Normally on x86 kit the x86 processor
596          * delays I/O port instructions when the ISA bus "dma in progress"
597          * signal is active.  Well, sparc64 systems do not monitor this
598          * signal thus we would need to block all I/O port accesses in software
599          * when a dma transfer is active for some device.
600          */
601
602         sun_fdc = (struct sun_flpy_controller *)isa_dev->resource.start;
603         FLOPPY_IRQ = isa_dev->irq;
604
605         sun_fdops.fd_inb = sun_pci_fd_inb;
606         sun_fdops.fd_outb = sun_pci_fd_outb;
607
608         can_use_virtual_dma = use_virtual_dma = 1;
609         sun_fdops.fd_enable_dma = sun_fd_enable_dma;
610         sun_fdops.fd_disable_dma = sun_fd_disable_dma;
611         sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
612         sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
613         sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
614         sun_fdops.get_dma_residue = sun_get_dma_residue;
615
616         sun_fdops.fd_request_irq = sun_fd_request_irq;
617         sun_fdops.fd_free_irq = sun_fd_free_irq;
618
619         /* Floppy eject is manual.   Actually, could determine this
620          * via presence of 'manual' property in OBP node.
621          */
622         sun_fdops.fd_eject = sun_pci_fd_eject;
623
624         fdc_status = (unsigned long) &sun_fdc->status_82077;
625         FLOPPY_MOTOR_MASK = 0xf0;
626
627         allowed_drive_mask = 0;
628         sun_floppy_types[0] = 0;
629         sun_floppy_types[1] = 4;
630
631         sun_pci_broken_drive = 1;
632         sun_fdops.fd_outb = sun_pci_fd_broken_outb;
633
634         return sun_floppy_types[0];
635 }
636 #endif /* ISA_FLOPPY_WORKS */
637
638 #endif
639
640 static unsigned long __init sun_floppy_init(void)
641 {
642         char state[128];
643         struct sbus_bus *bus;
644         struct sbus_dev *sdev = NULL;
645         static int initialized = 0;
646
647         if (initialized)
648                 return sun_floppy_types[0];
649         initialized = 1;
650
651         for_all_sbusdev (sdev, bus) {
652                 if (!strcmp(sdev->prom_name, "SUNW,fdtwo")) 
653                         break;
654         }
655         if(sdev) {
656                 floppy_sdev = sdev;
657                 FLOPPY_IRQ = sdev->irqs[0];
658         } else {
659 #ifdef CONFIG_PCI
660                 struct linux_ebus *ebus;
661                 struct linux_ebus_device *edev = NULL;
662                 unsigned long config = 0;
663                 void __iomem *auxio_reg;
664                 const char *state_prop;
665
666                 for_each_ebus(ebus) {
667                         for_each_ebusdev(edev, ebus) {
668                                 if (ebus_fdthree_p(edev))
669                                         goto ebus_done;
670                         }
671                 }
672         ebus_done:
673                 if (!edev) {
674 #ifdef ISA_FLOPPY_WORKS
675                         return isa_floppy_init();
676 #else
677                         return 0;
678 #endif
679                 }
680
681                 state_prop = of_get_property(edev->prom_node, "status", NULL);
682                 if (state_prop && !strncmp(state_prop, "disabled", 8))
683                         return 0;
684                         
685                 FLOPPY_IRQ = edev->irqs[0];
686
687                 /* Make sure the high density bit is set, some systems
688                  * (most notably Ultra5/Ultra10) come up with it clear.
689                  */
690                 auxio_reg = (void __iomem *) edev->resource[2].start;
691                 writel(readl(auxio_reg)|0x2, auxio_reg);
692
693                 sun_pci_ebus_dev = ebus->self;
694
695                 spin_lock_init(&sun_pci_fd_ebus_dma.lock);
696
697                 /* XXX ioremap */
698                 sun_pci_fd_ebus_dma.regs = (void __iomem *)
699                         edev->resource[1].start;
700                 if (!sun_pci_fd_ebus_dma.regs)
701                         return 0;
702
703                 sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER |
704                                              EBUS_DMA_FLAG_TCI_DISABLE);
705                 sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback;
706                 sun_pci_fd_ebus_dma.client_cookie = NULL;
707                 sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ;
708                 strcpy(sun_pci_fd_ebus_dma.name, "floppy");
709                 if (ebus_dma_register(&sun_pci_fd_ebus_dma))
710                         return 0;
711
712                 /* XXX ioremap */
713                 sun_fdc = (struct sun_flpy_controller *)edev->resource[0].start;
714
715                 sun_fdops.fd_inb = sun_pci_fd_inb;
716                 sun_fdops.fd_outb = sun_pci_fd_outb;
717
718                 can_use_virtual_dma = use_virtual_dma = 0;
719                 sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma;
720                 sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma;
721                 sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode;
722                 sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr;
723                 sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count;
724                 sun_fdops.get_dma_residue = sun_pci_get_dma_residue;
725
726                 sun_fdops.fd_request_irq = sun_pci_fd_request_irq;
727                 sun_fdops.fd_free_irq = sun_pci_fd_free_irq;
728
729                 sun_fdops.fd_eject = sun_pci_fd_eject;
730
731                 fdc_status = (unsigned long) &sun_fdc->status_82077;
732                 FLOPPY_MOTOR_MASK = 0xf0;
733
734                 /*
735                  * XXX: Find out on which machines this is really needed.
736                  */
737                 if (1) {
738                         sun_pci_broken_drive = 1;
739                         sun_fdops.fd_outb = sun_pci_fd_broken_outb;
740                 }
741
742                 allowed_drive_mask = 0;
743                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0))
744                         sun_floppy_types[0] = 4;
745                 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1))
746                         sun_floppy_types[1] = 4;
747
748                 /*
749                  * Find NS87303 SuperIO config registers (through ecpp).
750                  */
751                 for_each_ebus(ebus) {
752                         for_each_ebusdev(edev, ebus) {
753                                 if (!strcmp(edev->prom_node->name, "ecpp")) {
754                                         config = edev->resource[1].start;
755                                         goto config_done;
756                                 }
757                         }
758                 }
759         config_done:
760
761                 /*
762                  * Sanity check, is this really the NS87303?
763                  */
764                 switch (config & 0x3ff) {
765                 case 0x02e:
766                 case 0x15c:
767                 case 0x26e:
768                 case 0x398:
769                         break;
770                 default:
771                         config = 0;
772                 }
773
774                 if (!config)
775                         return sun_floppy_types[0];
776
777                 /* Enable PC-AT mode. */
778                 ns87303_modify(config, ASC, 0, 0xc0);
779
780 #ifdef PCI_FDC_SWAP_DRIVES
781                 /*
782                  * If only Floppy 1 is present, swap drives.
783                  */
784                 if (!sun_floppy_types[0] && sun_floppy_types[1]) {
785                         /*
786                          * Set the drive exchange bit in FCR on NS87303,
787                          * make sure other bits are sane before doing so.
788                          */
789                         ns87303_modify(config, FER, FER_EDM, 0);
790                         ns87303_modify(config, ASC, ASC_DRV2_SEL, 0);
791                         ns87303_modify(config, FCR, 0, FCR_LDE);
792
793                         config = sun_floppy_types[0];
794                         sun_floppy_types[0] = sun_floppy_types[1];
795                         sun_floppy_types[1] = config;
796
797                         if (sun_pci_broken_drive != -1) {
798                                 sun_pci_broken_drive = 1 - sun_pci_broken_drive;
799                                 sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb;
800                         }
801                 }
802 #endif /* PCI_FDC_SWAP_DRIVES */
803
804                 return sun_floppy_types[0];
805 #else
806                 return 0;
807 #endif
808         }
809         prom_getproperty(sdev->prom_node, "status", state, sizeof(state));
810         if(!strncmp(state, "disabled", 8))
811                 return 0;
812
813         /*
814          * We cannot do sbus_ioremap here: it does request_region,
815          * which the generic floppy driver tries to do once again.
816          * But we must use the sdev resource values as they have
817          * had parent ranges applied.
818          */
819         sun_fdc = (struct sun_flpy_controller *)
820                 (sdev->resource[0].start +
821                  ((sdev->resource[0].flags & 0x1ffUL) << 32UL));
822
823         /* Last minute sanity check... */
824         if(sbus_readb(&sun_fdc->status1_82077) == 0xff) {
825                 sun_fdc = (struct sun_flpy_controller *)-1;
826                 return 0;
827         }
828
829         sun_fdops.fd_inb = sun_82077_fd_inb;
830         sun_fdops.fd_outb = sun_82077_fd_outb;
831
832         can_use_virtual_dma = use_virtual_dma = 1;
833         sun_fdops.fd_enable_dma = sun_fd_enable_dma;
834         sun_fdops.fd_disable_dma = sun_fd_disable_dma;
835         sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
836         sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
837         sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
838         sun_fdops.get_dma_residue = sun_get_dma_residue;
839
840         sun_fdops.fd_request_irq = sun_fd_request_irq;
841         sun_fdops.fd_free_irq = sun_fd_free_irq;
842
843         sun_fdops.fd_eject = sun_fd_eject;
844
845         fdc_status = (unsigned long) &sun_fdc->status_82077;
846
847         /* Success... */
848         allowed_drive_mask = 0x01;
849         sun_floppy_types[0] = 4;
850         sun_floppy_types[1] = 0;
851
852         return sun_floppy_types[0];
853 }
854
855 #define EXTRA_FLOPPY_PARAMS
856
857 static DEFINE_SPINLOCK(dma_spin_lock);
858
859 #define claim_dma_lock() \
860 ({      unsigned long flags; \
861         spin_lock_irqsave(&dma_spin_lock, flags); \
862         flags; \
863 })
864
865 #define release_dma_lock(__flags) \
866         spin_unlock_irqrestore(&dma_spin_lock, __flags);
867
868 #endif /* !(__ASM_SPARC64_FLOPPY_H) */