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Merge tag 'master-2014-07-31' of git://git.kernel.org/pub/scm/linux/kernel/git/linvil...
[deliverable/linux.git] / arch / sparc / include / asm / floppy_64.h
CommitLineData
f5e706ad
SR		 1/* floppy.h: Sparc specific parts of the Floppy driver.
2 *
10a104f9 3 * Copyright (C) 1996, 2007, 2008 David S. Miller (davem@davemloft.net)
f5e706ad
SR		 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
10a104f9
DM		 12#include <linux/of.h>
13#include <linux/of_device.h>
3ae627a1 14#include <linux/dma-mapping.h>
f5e706ad 15
f5e706ad 16#include <asm/auxio.h>
f5e706ad
SR		 17
18/*
19 * Define this to enable exchanging drive 0 and 1 if only drive 1 is
20 * probed on PCI machines.
21 */
22#undef PCI_FDC_SWAP_DRIVES
23
24
25/* References:
26 * 1) Netbsd Sun floppy driver.
27 * 2) NCR 82077 controller manual
28 * 3) Intel 82077 controller manual
29 */
30struct sun_flpy_controller {
31 volatile unsigned char status1_82077; /* Auxiliary Status reg. 1 */
32 volatile unsigned char status2_82077; /* Auxiliary Status reg. 2 */
33 volatile unsigned char dor_82077; /* Digital Output reg. */
34 volatile unsigned char tapectl_82077; /* Tape Control reg */
35 volatile unsigned char status_82077; /* Main Status Register. */
36#define drs_82077 status_82077 /* Digital Rate Select reg. */
37 volatile unsigned char data_82077; /* Data fifo. */
38 volatile unsigned char ___unused;
39 volatile unsigned char dir_82077; /* Digital Input reg. */
40#define dcr_82077 dir_82077 /* Config Control reg. */
41};
42
43/* You'll only ever find one controller on an Ultra anyways. */
44static struct sun_flpy_controller *sun_fdc = (struct sun_flpy_controller *)-1;
45unsigned long fdc_status;
94a0cb1f 46static struct platform_device *floppy_op = NULL;
f5e706ad
SR		 47
48struct sun_floppy_ops {
49 unsigned char (*fd_inb) (unsigned long port);
50 void (*fd_outb) (unsigned char value, unsigned long port);
51 void (*fd_enable_dma) (void);
52 void (*fd_disable_dma) (void);
53 void (*fd_set_dma_mode) (int);
54 void (*fd_set_dma_addr) (char *);
55 void (*fd_set_dma_count) (int);
56 unsigned int (*get_dma_residue) (void);
57 int (*fd_request_irq) (void);
58 void (*fd_free_irq) (void);
59 int (*fd_eject) (int);
60};
61
62static struct sun_floppy_ops sun_fdops;
63
64#define fd_inb(port) sun_fdops.fd_inb(port)
65#define fd_outb(value,port) sun_fdops.fd_outb(value,port)
66#define fd_enable_dma() sun_fdops.fd_enable_dma()
67#define fd_disable_dma() sun_fdops.fd_disable_dma()
68#define fd_request_dma() (0) /* nothing... */
69#define fd_free_dma() /* nothing... */
70#define fd_clear_dma_ff() /* nothing... */
71#define fd_set_dma_mode(mode) sun_fdops.fd_set_dma_mode(mode)
72#define fd_set_dma_addr(addr) sun_fdops.fd_set_dma_addr(addr)
73#define fd_set_dma_count(count) sun_fdops.fd_set_dma_count(count)
74#define get_dma_residue(x) sun_fdops.get_dma_residue()
75#define fd_cacheflush(addr, size) /* nothing... */
76#define fd_request_irq() sun_fdops.fd_request_irq()
77#define fd_free_irq() sun_fdops.fd_free_irq()
78#define fd_eject(drive) sun_fdops.fd_eject(drive)
79
80/* Super paranoid... */
81#undef HAVE_DISABLE_HLT
82
83static int sun_floppy_types[2] = { 0, 0 };
84
85/* Here is where we catch the floppy driver trying to initialize,
86 * therefore this is where we call the PROM device tree probing
87 * routine etc. on the Sparc.
88 */
89#define FLOPPY0_TYPE sun_floppy_init()
90#define FLOPPY1_TYPE sun_floppy_types[1]
91
92#define FDC1 ((unsigned long)sun_fdc)
93
94#define N_FDC 1
95#define N_DRIVE 8
96
97/* No 64k boundary crossing problems on the Sparc. */
98#define CROSS_64KB(a,s) (0)
99
100static unsigned char sun_82077_fd_inb(unsigned long port)
101{
102 udelay(5);
103 switch(port & 7) {
104 default:
105 printk("floppy: Asked to read unknown port %lx\n", port);
106 panic("floppy: Port bolixed.");
107 case 4: /* FD_STATUS */
108 return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA;
109 case 5: /* FD_DATA */
110 return sbus_readb(&sun_fdc->data_82077);
111 case 7: /* FD_DIR */
112 /* XXX: Is DCL on 0x80 in sun4m? */
113 return sbus_readb(&sun_fdc->dir_82077);
6cb79b3f 114 }
f5e706ad
SR		 115 panic("sun_82072_fd_inb: How did I get here?");
116}
117
118static void sun_82077_fd_outb(unsigned char value, unsigned long port)
119{
120 udelay(5);
121 switch(port & 7) {
122 default:
123 printk("floppy: Asked to write to unknown port %lx\n", port);
124 panic("floppy: Port bolixed.");
125 case 2: /* FD_DOR */
126 /* Happily, the 82077 has a real DOR register. */
127 sbus_writeb(value, &sun_fdc->dor_82077);
128 break;
129 case 5: /* FD_DATA */
130 sbus_writeb(value, &sun_fdc->data_82077);
131 break;
132 case 7: /* FD_DCR */
133 sbus_writeb(value, &sun_fdc->dcr_82077);
134 break;
135 case 4: /* FD_STATUS */
136 sbus_writeb(value, &sun_fdc->status_82077);
137 break;
6cb79b3f 138 }
f5e706ad
SR		 139 return;
140}
141
142/* For pseudo-dma (Sun floppy drives have no real DMA available to
143 * them so we must eat the data fifo bytes directly ourselves) we have
144 * three state variables. doing_pdma tells our inline low-level
145 * assembly floppy interrupt entry point whether it should sit and eat
146 * bytes from the fifo or just transfer control up to the higher level
147 * floppy interrupt c-code. I tried very hard but I could not get the
148 * pseudo-dma to work in c-code without getting many overruns and
149 * underruns. If non-zero, doing_pdma encodes the direction of
150 * the transfer for debugging. 1=read 2=write
151 */
152unsigned char *pdma_vaddr;
153unsigned long pdma_size;
154volatile int doing_pdma = 0;
155
156/* This is software state */
157char *pdma_base = NULL;
158unsigned long pdma_areasize;
159
160/* Common routines to all controller types on the Sparc. */
161static void sun_fd_disable_dma(void)
162{
163 doing_pdma = 0;
679bea5e 164 pdma_base = NULL;
f5e706ad
SR		 165}
166
167static void sun_fd_set_dma_mode(int mode)
168{
169 switch(mode) {
170 case DMA_MODE_READ:
171 doing_pdma = 1;
172 break;
173 case DMA_MODE_WRITE:
174 doing_pdma = 2;
175 break;
176 default:
177 printk("Unknown dma mode %d\n", mode);
178 panic("floppy: Giving up...");
179 }
180}
181
182static void sun_fd_set_dma_addr(char *buffer)
183{
184 pdma_vaddr = buffer;
185}
186
187static void sun_fd_set_dma_count(int length)
188{
189 pdma_size = length;
190}
191
192static void sun_fd_enable_dma(void)
193{
f5e706ad
SR		 194 pdma_base = pdma_vaddr;
195 pdma_areasize = pdma_size;
196}
197
198irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie)
199{
200 if (likely(doing_pdma)) {
201 void __iomem *stat = (void __iomem *) fdc_status;
202 unsigned char *vaddr = pdma_vaddr;
203 unsigned long size = pdma_size;
204 u8 val;
205
206 while (size) {
207 val = readb(stat);
208 if (unlikely(!(val & 0x80))) {
209 pdma_vaddr = vaddr;
210 pdma_size = size;
211 return IRQ_HANDLED;
212 }
213 if (unlikely(!(val & 0x20))) {
214 pdma_vaddr = vaddr;
215 pdma_size = size;
216 doing_pdma = 0;
217 goto main_interrupt;
218 }
219 if (val & 0x40) {
220 /* read */
221 *vaddr++ = readb(stat + 1);
222 } else {
223 unsigned char data = *vaddr++;
224
225 /* write */
226 writeb(data, stat + 1);
227 }
228 size--;
229 }
230
231 pdma_vaddr = vaddr;
232 pdma_size = size;
233
234 /* Send Terminal Count pulse to floppy controller. */
235 val = readb(auxio_register);
236 val |= AUXIO_AUX1_FTCNT;
237 writeb(val, auxio_register);
238 val &= ~AUXIO_AUX1_FTCNT;
239 writeb(val, auxio_register);
240
241 doing_pdma = 0;
242 }
243
244main_interrupt:
245 return floppy_interrupt(irq, dev_cookie);
246}
247
248static int sun_fd_request_irq(void)
249{
250 static int once = 0;
251 int error;
252
253 if(!once) {
254 once = 1;
255
256 error = request_irq(FLOPPY_IRQ, sparc_floppy_irq,
d2f09b1c 257 0, "floppy", NULL);
f5e706ad
SR		 258
259 return ((error == 0) ? 0 : -1);
260 }
261 return 0;
262}
263
264static void sun_fd_free_irq(void)
265{
266}
267
268static unsigned int sun_get_dma_residue(void)
269{
270 /* XXX This isn't really correct. XXX */
271 return 0;
272}
273
274static int sun_fd_eject(int drive)
275{
276 set_dor(0x00, 0xff, 0x90);
277 udelay(500);
278 set_dor(0x00, 0x6f, 0x00);
279 udelay(500);
280 return 0;
281}
282
aae7fb87 283#include <asm/ebus_dma.h>
f5e706ad
SR		 284#include <asm/ns87303.h>
285
286static struct ebus_dma_info sun_pci_fd_ebus_dma;
3ae627a1 287static struct device *sun_floppy_dev;
f5e706ad
SR		 288static int sun_pci_broken_drive = -1;
289
290struct sun_pci_dma_op {
291 unsigned int addr;
292 int len;
293 int direction;
294 char *buf;
295};
296static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL};
297static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL};
298
f05a6865 299irqreturn_t floppy_interrupt(int irq, void *dev_id);
f5e706ad
SR		 300
301static unsigned char sun_pci_fd_inb(unsigned long port)
302{
303 udelay(5);
304 return inb(port);
305}
306
307static void sun_pci_fd_outb(unsigned char val, unsigned long port)
308{
309 udelay(5);
310 outb(val, port);
311}
312
313static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port)
314{
315 udelay(5);
316 /*
317 * XXX: Due to SUN's broken floppy connector on AX and AXi
318 * we need to turn on MOTOR_0 also, if the floppy is
319 * jumpered to DS1 (like most PC floppies are). I hope
320 * this does not hurt correct hardware like the AXmp.
321 * (Eddie, Sep 12 1998).
322 */
323 if (port == ((unsigned long)sun_fdc) + 2) {
324 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
325 val |= 0x10;
326 }
327 }
328 outb(val, port);
329}
330
331#ifdef PCI_FDC_SWAP_DRIVES
332static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port)
333{
334 udelay(5);
335 /*
336 * XXX: Due to SUN's broken floppy connector on AX and AXi
337 * we need to turn on MOTOR_0 also, if the floppy is
338 * jumpered to DS1 (like most PC floppies are). I hope
339 * this does not hurt correct hardware like the AXmp.
340 * (Eddie, Sep 12 1998).
341 */
342 if (port == ((unsigned long)sun_fdc) + 2) {
343 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
344 val &= ~(0x03);
345 val |= 0x21;
346 }
347 }
348 outb(val, port);
349}
350#endif /* PCI_FDC_SWAP_DRIVES */
351
352static void sun_pci_fd_enable_dma(void)
353{
354 BUG_ON((NULL == sun_pci_dma_pending.buf) ||
355 (0 == sun_pci_dma_pending.len) ||
356 (0 == sun_pci_dma_pending.direction));
357
358 sun_pci_dma_current.buf = sun_pci_dma_pending.buf;
359 sun_pci_dma_current.len = sun_pci_dma_pending.len;
360 sun_pci_dma_current.direction = sun_pci_dma_pending.direction;
361
362 sun_pci_dma_pending.buf = NULL;
363 sun_pci_dma_pending.len = 0;
364 sun_pci_dma_pending.direction = 0;
365 sun_pci_dma_pending.addr = -1U;
366
367 sun_pci_dma_current.addr =
3ae627a1 368 dma_map_single(sun_floppy_dev,
f5e706ad
SR		 369 sun_pci_dma_current.buf,
370 sun_pci_dma_current.len,
371 sun_pci_dma_current.direction);
372
373 ebus_dma_enable(&sun_pci_fd_ebus_dma, 1);
374
375 if (ebus_dma_request(&sun_pci_fd_ebus_dma,
376 sun_pci_dma_current.addr,
377 sun_pci_dma_current.len))
378 BUG();
379}
380
381static void sun_pci_fd_disable_dma(void)
382{
383 ebus_dma_enable(&sun_pci_fd_ebus_dma, 0);
384 if (sun_pci_dma_current.addr != -1U)
3ae627a1 385 dma_unmap_single(sun_floppy_dev,
f5e706ad
SR		 386 sun_pci_dma_current.addr,
387 sun_pci_dma_current.len,
388 sun_pci_dma_current.direction);
389 sun_pci_dma_current.addr = -1U;
390}
391
392static void sun_pci_fd_set_dma_mode(int mode)
393{
394 if (mode == DMA_MODE_WRITE)
3ae627a1 395 sun_pci_dma_pending.direction = DMA_TO_DEVICE;
f5e706ad 396 else
3ae627a1 397 sun_pci_dma_pending.direction = DMA_FROM_DEVICE;
f5e706ad
SR		 398
399 ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE);
400}
401
402static void sun_pci_fd_set_dma_count(int length)
403{
404 sun_pci_dma_pending.len = length;
405}
406
407static void sun_pci_fd_set_dma_addr(char *buffer)
408{
409 sun_pci_dma_pending.buf = buffer;
410}
411
412static unsigned int sun_pci_get_dma_residue(void)
413{
414 return ebus_dma_residue(&sun_pci_fd_ebus_dma);
415}
416
417static int sun_pci_fd_request_irq(void)
418{
419 return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1);
420}
421
422static void sun_pci_fd_free_irq(void)
423{
424 ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0);
425}
426
427static int sun_pci_fd_eject(int drive)
428{
429 return -EINVAL;
430}
431
432void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie)
433{
434 floppy_interrupt(0, NULL);
435}
436
437/*
438 * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI,
439 * even if this is configured using DS1, thus looks like /dev/fd1 with
440 * the cabling used in Ultras.
441 */
442#define DOR (port + 2)
443#define MSR (port + 4)
444#define FIFO (port + 5)
445
446static void sun_pci_fd_out_byte(unsigned long port, unsigned char val,
447 unsigned long reg)
448{
449 unsigned char status;
450 int timeout = 1000;
451
452 while (!((status = inb(MSR)) & 0x80) && --timeout)
453 udelay(100);
454 outb(val, reg);
455}
456
457static unsigned char sun_pci_fd_sensei(unsigned long port)
458{
459 unsigned char result[2] = { 0x70, 0x00 };
460 unsigned char status;
461 int i = 0;
462
463 sun_pci_fd_out_byte(port, 0x08, FIFO);
464 do {
465 int timeout = 1000;
466
467 while (!((status = inb(MSR)) & 0x80) && --timeout)
468 udelay(100);
469
470 if (!timeout)
471 break;
472
473 if ((status & 0xf0) == 0xd0)
474 result[i++] = inb(FIFO);
475 else
476 break;
477 } while (i < 2);
478
479 return result[0];
480}
481
482static void sun_pci_fd_reset(unsigned long port)
483{
484 unsigned char mask = 0x00;
485 unsigned char status;
486 int timeout = 10000;
487
488 outb(0x80, MSR);
489 do {
490 status = sun_pci_fd_sensei(port);
491 if ((status & 0xc0) == 0xc0)
492 mask |= 1 << (status & 0x03);
493 else
494 udelay(100);
495 } while ((mask != 0x0f) && --timeout);
496}
497
498static int sun_pci_fd_test_drive(unsigned long port, int drive)
499{
500 unsigned char status, data;
501 int timeout = 1000;
502 int ready;
503
504 sun_pci_fd_reset(port);
505
506 data = (0x10 << drive) | 0x0c | drive;
507 sun_pci_fd_out_byte(port, data, DOR);
508
509 sun_pci_fd_out_byte(port, 0x07, FIFO);
510 sun_pci_fd_out_byte(port, drive & 0x03, FIFO);
511
512 do {
513 udelay(100);
514 status = sun_pci_fd_sensei(port);
515 } while (((status & 0xc0) == 0x80) && --timeout);
516
517 if (!timeout)
518 ready = 0;
519 else
520 ready = (status & 0x10) ? 0 : 1;
521
522 sun_pci_fd_reset(port);
523 return ready;
524}
525#undef FIFO
526#undef MSR
527#undef DOR
528
3ae627a1 529static int __init ebus_fdthree_p(struct device_node *dp)
f5e706ad 530{
3ae627a1 531 if (!strcmp(dp->name, "fdthree"))
f5e706ad 532 return 1;
3ae627a1 533 if (!strcmp(dp->name, "floppy")) {
f5e706ad
SR		 534 const char *compat;
535
3ae627a1 536 compat = of_get_property(dp, "compatible", NULL);
f5e706ad
SR		 537 if (compat && !strcmp(compat, "fdthree"))
538 return 1;
539 }
540 return 0;
541}
f5e706ad
SR		 542
543static unsigned long __init sun_floppy_init(void)
544{
f5e706ad 545 static int initialized = 0;
10a104f9 546 struct device_node *dp;
94a0cb1f 547 struct platform_device *op;
10a104f9
DM		 548 const char *prop;
549 char state[128];
f5e706ad
SR		 550
551 if (initialized)
552 return sun_floppy_types[0];
553 initialized = 1;
554
10a104f9
DM		 555 op = NULL;
556
557 for_each_node_by_name(dp, "SUNW,fdtwo") {
558 if (strcmp(dp->parent->name, "sbus"))
559 continue;
560 op = of_find_device_by_node(dp);
561 if (op)
f5e706ad
SR		 562 break;
563 }
10a104f9
DM		 564 if (op) {
565 floppy_op = op;
1636f8ac 566 FLOPPY_IRQ = op->archdata.irqs[0];
f5e706ad 567 } else {
3ae627a1 568 struct device_node *ebus_dp;
f5e706ad
SR		 569 void __iomem *auxio_reg;
570 const char *state_prop;
3ae627a1 571 unsigned long config;
f5e706ad 572
3ae627a1
DM		 573 dp = NULL;
574 for_each_node_by_name(ebus_dp, "ebus") {
575 for (dp = ebus_dp->child; dp; dp = dp->sibling) {
576 if (ebus_fdthree_p(dp))
577 goto found_fdthree;
f5e706ad
SR		 578 }
579 }
3ae627a1
DM		 580 found_fdthree:
581 if (!dp)
f5e706ad
SR		 582 return 0;
583
3ae627a1
DM		 584 op = of_find_device_by_node(dp);
585 if (!op)
586 return 0;
10a104f9 587
61c7a080 588 state_prop = of_get_property(op->dev.of_node, "status", NULL);
f5e706ad
SR		 589 if (state_prop && !strncmp(state_prop, "disabled", 8))
590 return 0;
591
1636f8ac 592 FLOPPY_IRQ = op->archdata.irqs[0];
f5e706ad
SR		 593
594 /* Make sure the high density bit is set, some systems
595 * (most notably Ultra5/Ultra10) come up with it clear.
596 */
3ae627a1 597 auxio_reg = (void __iomem *) op->resource[2].start;
f5e706ad
SR		 598 writel(readl(auxio_reg)|0x2, auxio_reg);
599
3ae627a1 600 sun_floppy_dev = &op->dev;
f5e706ad
SR		 601
602 spin_lock_init(&sun_pci_fd_ebus_dma.lock);
603
604 /* XXX ioremap */
605 sun_pci_fd_ebus_dma.regs = (void __iomem *)
3ae627a1 606 op->resource[1].start;
f5e706ad
SR		 607 if (!sun_pci_fd_ebus_dma.regs)
608 return 0;
609
610 sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER |
611 EBUS_DMA_FLAG_TCI_DISABLE);
612 sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback;
613 sun_pci_fd_ebus_dma.client_cookie = NULL;
614 sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ;
615 strcpy(sun_pci_fd_ebus_dma.name, "floppy");
616 if (ebus_dma_register(&sun_pci_fd_ebus_dma))
617 return 0;
618
619 /* XXX ioremap */
3ae627a1 620 sun_fdc = (struct sun_flpy_controller *) op->resource[0].start;
f5e706ad
SR		 621
622 sun_fdops.fd_inb = sun_pci_fd_inb;
623 sun_fdops.fd_outb = sun_pci_fd_outb;
624
625 can_use_virtual_dma = use_virtual_dma = 0;
626 sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma;
627 sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma;
628 sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode;
629 sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr;
630 sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count;
631 sun_fdops.get_dma_residue = sun_pci_get_dma_residue;
632
633 sun_fdops.fd_request_irq = sun_pci_fd_request_irq;
634 sun_fdops.fd_free_irq = sun_pci_fd_free_irq;
635
636 sun_fdops.fd_eject = sun_pci_fd_eject;
637
638 fdc_status = (unsigned long) &sun_fdc->status_82077;
639
640 /*
641 * XXX: Find out on which machines this is really needed.
642 */
643 if (1) {
644 sun_pci_broken_drive = 1;
645 sun_fdops.fd_outb = sun_pci_fd_broken_outb;
646 }
647
648 allowed_drive_mask = 0;
649 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0))
650 sun_floppy_types[0] = 4;
651 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1))
652 sun_floppy_types[1] = 4;
653
654 /*
655 * Find NS87303 SuperIO config registers (through ecpp).
656 */
3ae627a1
DM		 657 config = 0;
658 for (dp = ebus_dp->child; dp; dp = dp->sibling) {
659 if (!strcmp(dp->name, "ecpp")) {
94a0cb1f 660 struct platform_device *ecpp_op;
3ae627a1
DM		 661
662 ecpp_op = of_find_device_by_node(dp);
663 if (ecpp_op)
664 config = ecpp_op->resource[1].start;
665 goto config_done;
f5e706ad
SR		 666 }
667 }
668 config_done:
669
670 /*
671 * Sanity check, is this really the NS87303?
672 */
673 switch (config & 0x3ff) {
674 case 0x02e:
675 case 0x15c:
676 case 0x26e:
677 case 0x398:
678 break;
679 default:
680 config = 0;
681 }
682
683 if (!config)
684 return sun_floppy_types[0];
685
686 /* Enable PC-AT mode. */
687 ns87303_modify(config, ASC, 0, 0xc0);
688
689#ifdef PCI_FDC_SWAP_DRIVES
690 /*
691 * If only Floppy 1 is present, swap drives.
692 */
693 if (!sun_floppy_types[0] && sun_floppy_types[1]) {
694 /*
695 * Set the drive exchange bit in FCR on NS87303,
696 * make sure other bits are sane before doing so.
697 */
698 ns87303_modify(config, FER, FER_EDM, 0);
699 ns87303_modify(config, ASC, ASC_DRV2_SEL, 0);
700 ns87303_modify(config, FCR, 0, FCR_LDE);
701
702 config = sun_floppy_types[0];
703 sun_floppy_types[0] = sun_floppy_types[1];
704 sun_floppy_types[1] = config;
705
706 if (sun_pci_broken_drive != -1) {
707 sun_pci_broken_drive = 1 - sun_pci_broken_drive;
708 sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb;
709 }
710 }
711#endif /* PCI_FDC_SWAP_DRIVES */
712
713 return sun_floppy_types[0];
f5e706ad 714 }
61c7a080 715 prop = of_get_property(op->dev.of_node, "status", NULL);
10a104f9 716 if (prop && !strncmp(state, "disabled", 8))
f5e706ad
SR		 717 return 0;
718
719 /*
10a104f9 720 * We cannot do of_ioremap here: it does request_region,
f5e706ad
SR		 721 * which the generic floppy driver tries to do once again.
722 * But we must use the sdev resource values as they have
723 * had parent ranges applied.
724 */
725 sun_fdc = (struct sun_flpy_controller *)
10a104f9
DM		 726 (op->resource[0].start +
727 ((op->resource[0].flags & 0x1ffUL) << 32UL));
f5e706ad
SR		 728
729 /* Last minute sanity check... */
10a104f9 730 if (sbus_readb(&sun_fdc->status1_82077) == 0xff) {
f5e706ad
SR		 731 sun_fdc = (struct sun_flpy_controller *)-1;
732 return 0;
733 }
734
735 sun_fdops.fd_inb = sun_82077_fd_inb;
736 sun_fdops.fd_outb = sun_82077_fd_outb;
737
738 can_use_virtual_dma = use_virtual_dma = 1;
739 sun_fdops.fd_enable_dma = sun_fd_enable_dma;
740 sun_fdops.fd_disable_dma = sun_fd_disable_dma;
741 sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
742 sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
743 sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
744 sun_fdops.get_dma_residue = sun_get_dma_residue;
745
746 sun_fdops.fd_request_irq = sun_fd_request_irq;
747 sun_fdops.fd_free_irq = sun_fd_free_irq;
748
749 sun_fdops.fd_eject = sun_fd_eject;
750
751 fdc_status = (unsigned long) &sun_fdc->status_82077;
752
753 /* Success... */
754 allowed_drive_mask = 0x01;
755 sun_floppy_types[0] = 4;
756 sun_floppy_types[1] = 0;
757
758 return sun_floppy_types[0];
759}
760
761#define EXTRA_FLOPPY_PARAMS
762
763static DEFINE_SPINLOCK(dma_spin_lock);
764
765#define claim_dma_lock() \
766({ unsigned long flags; \
767 spin_lock_irqsave(&dma_spin_lock, flags); \
768 flags; \
769})
770
771#define release_dma_lock(__flags) \
772 spin_unlock_irqrestore(&dma_spin_lock, __flags);
773
774#endif /* !(__ASM_SPARC64_FLOPPY_H) */
Linux kernel - Deliverables
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