1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* floppy.h: Sparc specific parts of the Floppy driver.
3 *
4 * Copyright (C) 1996, 2007, 2008 David S. Miller (davem@davemloft.net)
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/of.h>
14 #include <linux/of_device.h>
15 #include <linux/dma-mapping.h>
16
17 #include <asm/auxio.h>
18
19 /*
20 * Define this to enable exchanging drive 0 and 1 if only drive 1 is
21 * probed on PCI machines.
22 */
23 #undef PCI_FDC_SWAP_DRIVES
24
25
26 /* References:
27 * 1) Netbsd Sun floppy driver.
28 * 2) NCR 82077 controller manual
29 * 3) Intel 82077 controller manual
30 */
31 struct sun_flpy_controller {
32 volatile unsigned char status1_82077; /* Auxiliary Status reg. 1 */
33 volatile unsigned char status2_82077; /* Auxiliary Status reg. 2 */
34 volatile unsigned char dor_82077; /* Digital Output reg. */
35 volatile unsigned char tapectl_82077; /* Tape Control reg */
36 volatile unsigned char status_82077; /* Main Status Register. */
37 #define drs_82077 status_82077 /* Digital Rate Select reg. */
38 volatile unsigned char data_82077; /* Data fifo. */
39 volatile unsigned char ___unused;
40 volatile unsigned char dir_82077; /* Digital Input reg. */
41 #define dcr_82077 dir_82077 /* Config Control reg. */
42 };
43
44 /* You'll only ever find one controller on an Ultra anyways. */
45 static struct sun_flpy_controller *sun_fdc = (struct sun_flpy_controller *)-1;
46 unsigned long fdc_status;
47 static struct platform_device *floppy_op = NULL;
48
49 struct sun_floppy_ops {
50 unsigned char (*fd_inb) (unsigned long port, unsigned int reg);
51 void (*fd_outb) (unsigned char value, unsigned long base,
52 unsigned int reg);
53 void (*fd_enable_dma) (void);
54 void (*fd_disable_dma) (void);
55 void (*fd_set_dma_mode) (int);
56 void (*fd_set_dma_addr) (char *);
57 void (*fd_set_dma_count) (int);
58 unsigned int (*get_dma_residue) (void);
59 int (*fd_request_irq) (void);
60 void (*fd_free_irq) (void);
61 int (*fd_eject) (int);
62 };
63
64 static struct sun_floppy_ops sun_fdops;
65
66 #define fd_inb(base, reg) sun_fdops.fd_inb(base, reg)
67 #define fd_outb(value, base, reg) sun_fdops.fd_outb(value, base, reg)
68 #define fd_enable_dma() sun_fdops.fd_enable_dma()
69 #define fd_disable_dma() sun_fdops.fd_disable_dma()
70 #define fd_request_dma() (0) /* nothing... */
71 #define fd_free_dma() /* nothing... */
72 #define fd_clear_dma_ff() /* nothing... */
73 #define fd_set_dma_mode(mode) sun_fdops.fd_set_dma_mode(mode)
74 #define fd_set_dma_addr(addr) sun_fdops.fd_set_dma_addr(addr)
75 #define fd_set_dma_count(count) sun_fdops.fd_set_dma_count(count)
76 #define get_dma_residue(x) sun_fdops.get_dma_residue()
77 #define fd_request_irq() sun_fdops.fd_request_irq()
78 #define fd_free_irq() sun_fdops.fd_free_irq()
79 #define fd_eject(drive) sun_fdops.fd_eject(drive)
80
81 /* Super paranoid... */
82 #undef HAVE_DISABLE_HLT
83
84 static int sun_floppy_types[2] = { 0, 0 };
85
86 /* Here is where we catch the floppy driver trying to initialize,
87 * therefore this is where we call the PROM device tree probing
88 * routine etc. on the Sparc.
89 */
90 #define FLOPPY0_TYPE sun_floppy_init()
91 #define FLOPPY1_TYPE sun_floppy_types[1]
92
93 #define FDC1 ((unsigned long)sun_fdc)
94
95 #define N_FDC 1
96 #define N_DRIVE 8
97
98 /* No 64k boundary crossing problems on the Sparc. */
99 #define CROSS_64KB(a,s) (0)
100
sun_82077_fd_inb(unsigned long base,unsigned int reg)101 static unsigned char sun_82077_fd_inb(unsigned long base, unsigned int reg)
102 {
103 udelay(5);
104 switch (reg) {
105 default:
106 printk("floppy: Asked to read unknown port %x\n", reg);
107 panic("floppy: Port bolixed.");
108 case FD_STATUS:
109 return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA;
110 case FD_DATA:
111 return sbus_readb(&sun_fdc->data_82077);
112 case FD_DIR:
113 /* XXX: Is DCL on 0x80 in sun4m? */
114 return sbus_readb(&sun_fdc->dir_82077);
115 }
116 panic("sun_82072_fd_inb: How did I get here?");
117 }
118
sun_82077_fd_outb(unsigned char value,unsigned long base,unsigned int reg)119 static void sun_82077_fd_outb(unsigned char value, unsigned long base,
120 unsigned int reg)
121 {
122 udelay(5);
123 switch (reg) {
124 default:
125 printk("floppy: Asked to write to unknown port %x\n", reg);
126 panic("floppy: Port bolixed.");
127 case FD_DOR:
128 /* Happily, the 82077 has a real DOR register. */
129 sbus_writeb(value, &sun_fdc->dor_82077);
130 break;
131 case FD_DATA:
132 sbus_writeb(value, &sun_fdc->data_82077);
133 break;
134 case FD_DCR:
135 sbus_writeb(value, &sun_fdc->dcr_82077);
136 break;
137 case FD_DSR:
138 sbus_writeb(value, &sun_fdc->status_82077);
139 break;
140 }
141 return;
142 }
143
144 /* For pseudo-dma (Sun floppy drives have no real DMA available to
145 * them so we must eat the data fifo bytes directly ourselves) we have
146 * three state variables. doing_pdma tells our inline low-level
147 * assembly floppy interrupt entry point whether it should sit and eat
148 * bytes from the fifo or just transfer control up to the higher level
149 * floppy interrupt c-code. I tried very hard but I could not get the
150 * pseudo-dma to work in c-code without getting many overruns and
151 * underruns. If non-zero, doing_pdma encodes the direction of
152 * the transfer for debugging. 1=read 2=write
153 */
154 unsigned char *pdma_vaddr;
155 unsigned long pdma_size;
156 volatile int doing_pdma = 0;
157
158 /* This is software state */
159 char *pdma_base = NULL;
160 unsigned long pdma_areasize;
161
162 /* Common routines to all controller types on the Sparc. */
sun_fd_disable_dma(void)163 static void sun_fd_disable_dma(void)
164 {
165 doing_pdma = 0;
166 pdma_base = NULL;
167 }
168
sun_fd_set_dma_mode(int mode)169 static void sun_fd_set_dma_mode(int mode)
170 {
171 switch(mode) {
172 case DMA_MODE_READ:
173 doing_pdma = 1;
174 break;
175 case DMA_MODE_WRITE:
176 doing_pdma = 2;
177 break;
178 default:
179 printk("Unknown dma mode %d\n", mode);
180 panic("floppy: Giving up...");
181 }
182 }
183
sun_fd_set_dma_addr(char * buffer)184 static void sun_fd_set_dma_addr(char *buffer)
185 {
186 pdma_vaddr = buffer;
187 }
188
sun_fd_set_dma_count(int length)189 static void sun_fd_set_dma_count(int length)
190 {
191 pdma_size = length;
192 }
193
sun_fd_enable_dma(void)194 static void sun_fd_enable_dma(void)
195 {
196 pdma_base = pdma_vaddr;
197 pdma_areasize = pdma_size;
198 }
199
sparc_floppy_irq(int irq,void * dev_cookie)200 irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie)
201 {
202 if (likely(doing_pdma)) {
203 void __iomem *stat = (void __iomem *) fdc_status;
204 unsigned char *vaddr = pdma_vaddr;
205 unsigned long size = pdma_size;
206 u8 val;
207
208 while (size) {
209 val = readb(stat);
210 if (unlikely(!(val & 0x80))) {
211 pdma_vaddr = vaddr;
212 pdma_size = size;
213 return IRQ_HANDLED;
214 }
215 if (unlikely(!(val & 0x20))) {
216 pdma_vaddr = vaddr;
217 pdma_size = size;
218 doing_pdma = 0;
219 goto main_interrupt;
220 }
221 if (val & 0x40) {
222 /* read */
223 *vaddr++ = readb(stat + 1);
224 } else {
225 unsigned char data = *vaddr++;
226
227 /* write */
228 writeb(data, stat + 1);
229 }
230 size--;
231 }
232
233 pdma_vaddr = vaddr;
234 pdma_size = size;
235
236 /* Send Terminal Count pulse to floppy controller. */
237 val = readb(auxio_register);
238 val |= AUXIO_AUX1_FTCNT;
239 writeb(val, auxio_register);
240 val &= ~AUXIO_AUX1_FTCNT;
241 writeb(val, auxio_register);
242
243 doing_pdma = 0;
244 }
245
246 main_interrupt:
247 return floppy_interrupt(irq, dev_cookie);
248 }
249
sun_fd_request_irq(void)250 static int sun_fd_request_irq(void)
251 {
252 static int once = 0;
253 int error;
254
255 if(!once) {
256 once = 1;
257
258 error = request_irq(FLOPPY_IRQ, sparc_floppy_irq,
259 0, "floppy", NULL);
260
261 return ((error == 0) ? 0 : -1);
262 }
263 return 0;
264 }
265
sun_fd_free_irq(void)266 static void sun_fd_free_irq(void)
267 {
268 }
269
sun_get_dma_residue(void)270 static unsigned int sun_get_dma_residue(void)
271 {
272 /* XXX This isn't really correct. XXX */
273 return 0;
274 }
275
sun_fd_eject(int drive)276 static int sun_fd_eject(int drive)
277 {
278 set_dor(0x00, 0xff, 0x90);
279 udelay(500);
280 set_dor(0x00, 0x6f, 0x00);
281 udelay(500);
282 return 0;
283 }
284
285 #include <asm/ebus_dma.h>
286 #include <asm/ns87303.h>
287
288 static struct ebus_dma_info sun_pci_fd_ebus_dma;
289 static struct device *sun_floppy_dev;
290 static int sun_pci_broken_drive = -1;
291
292 struct sun_pci_dma_op {
293 unsigned int addr;
294 int len;
295 int direction;
296 char *buf;
297 };
298 static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL};
299 static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL};
300
301 irqreturn_t floppy_interrupt(int irq, void *dev_id);
302
sun_pci_fd_inb(unsigned long base,unsigned int reg)303 static unsigned char sun_pci_fd_inb(unsigned long base, unsigned int reg)
304 {
305 udelay(5);
306 return inb(base + reg);
307 }
308
sun_pci_fd_outb(unsigned char val,unsigned long base,unsigned int reg)309 static void sun_pci_fd_outb(unsigned char val, unsigned long base,
310 unsigned int reg)
311 {
312 udelay(5);
313 outb(val, base + reg);
314 }
315
sun_pci_fd_broken_outb(unsigned char val,unsigned long base,unsigned int reg)316 static void sun_pci_fd_broken_outb(unsigned char val, unsigned long base,
317 unsigned int reg)
318 {
319 udelay(5);
320 /*
321 * XXX: Due to SUN's broken floppy connector on AX and AXi
322 * we need to turn on MOTOR_0 also, if the floppy is
323 * jumpered to DS1 (like most PC floppies are). I hope
324 * this does not hurt correct hardware like the AXmp.
325 * (Eddie, Sep 12 1998).
326 */
327 if (reg == FD_DOR) {
328 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
329 val |= 0x10;
330 }
331 }
332 outb(val, base + reg);
333 }
334
335 #ifdef PCI_FDC_SWAP_DRIVES
sun_pci_fd_lde_broken_outb(unsigned char val,unsigned long base,unsigned int reg)336 static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long base,
337 unsigned int reg)
338 {
339 udelay(5);
340 /*
341 * XXX: Due to SUN's broken floppy connector on AX and AXi
342 * we need to turn on MOTOR_0 also, if the floppy is
343 * jumpered to DS1 (like most PC floppies are). I hope
344 * this does not hurt correct hardware like the AXmp.
345 * (Eddie, Sep 12 1998).
346 */
347 if (reg == FD_DOR) {
348 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
349 val &= ~(0x03);
350 val |= 0x21;
351 }
352 }
353 outb(val, base + reg);
354 }
355 #endif /* PCI_FDC_SWAP_DRIVES */
356
sun_pci_fd_enable_dma(void)357 static void sun_pci_fd_enable_dma(void)
358 {
359 BUG_ON((NULL == sun_pci_dma_pending.buf) ||
360 (0 == sun_pci_dma_pending.len) ||
361 (0 == sun_pci_dma_pending.direction));
362
363 sun_pci_dma_current.buf = sun_pci_dma_pending.buf;
364 sun_pci_dma_current.len = sun_pci_dma_pending.len;
365 sun_pci_dma_current.direction = sun_pci_dma_pending.direction;
366
367 sun_pci_dma_pending.buf = NULL;
368 sun_pci_dma_pending.len = 0;
369 sun_pci_dma_pending.direction = 0;
370 sun_pci_dma_pending.addr = -1U;
371
372 sun_pci_dma_current.addr =
373 dma_map_single(sun_floppy_dev,
374 sun_pci_dma_current.buf,
375 sun_pci_dma_current.len,
376 sun_pci_dma_current.direction);
377
378 ebus_dma_enable(&sun_pci_fd_ebus_dma, 1);
379
380 if (ebus_dma_request(&sun_pci_fd_ebus_dma,
381 sun_pci_dma_current.addr,
382 sun_pci_dma_current.len))
383 BUG();
384 }
385
sun_pci_fd_disable_dma(void)386 static void sun_pci_fd_disable_dma(void)
387 {
388 ebus_dma_enable(&sun_pci_fd_ebus_dma, 0);
389 if (sun_pci_dma_current.addr != -1U)
390 dma_unmap_single(sun_floppy_dev,
391 sun_pci_dma_current.addr,
392 sun_pci_dma_current.len,
393 sun_pci_dma_current.direction);
394 sun_pci_dma_current.addr = -1U;
395 }
396
sun_pci_fd_set_dma_mode(int mode)397 static void sun_pci_fd_set_dma_mode(int mode)
398 {
399 if (mode == DMA_MODE_WRITE)
400 sun_pci_dma_pending.direction = DMA_TO_DEVICE;
401 else
402 sun_pci_dma_pending.direction = DMA_FROM_DEVICE;
403
404 ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE);
405 }
406
sun_pci_fd_set_dma_count(int length)407 static void sun_pci_fd_set_dma_count(int length)
408 {
409 sun_pci_dma_pending.len = length;
410 }
411
sun_pci_fd_set_dma_addr(char * buffer)412 static void sun_pci_fd_set_dma_addr(char *buffer)
413 {
414 sun_pci_dma_pending.buf = buffer;
415 }
416
sun_pci_get_dma_residue(void)417 static unsigned int sun_pci_get_dma_residue(void)
418 {
419 return ebus_dma_residue(&sun_pci_fd_ebus_dma);
420 }
421
sun_pci_fd_request_irq(void)422 static int sun_pci_fd_request_irq(void)
423 {
424 return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1);
425 }
426
sun_pci_fd_free_irq(void)427 static void sun_pci_fd_free_irq(void)
428 {
429 ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0);
430 }
431
sun_pci_fd_eject(int drive)432 static int sun_pci_fd_eject(int drive)
433 {
434 return -EINVAL;
435 }
436
sun_pci_fd_dma_callback(struct ebus_dma_info * p,int event,void * cookie)437 void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie)
438 {
439 floppy_interrupt(0, NULL);
440 }
441
442 /*
443 * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI,
444 * even if this is configured using DS1, thus looks like /dev/fd1 with
445 * the cabling used in Ultras.
446 */
447 #define DOR (port + 2)
448 #define MSR (port + 4)
449 #define FIFO (port + 5)
450
sun_pci_fd_out_byte(unsigned long port,unsigned char val,unsigned long reg)451 static void sun_pci_fd_out_byte(unsigned long port, unsigned char val,
452 unsigned long reg)
453 {
454 unsigned char status;
455 int timeout = 1000;
456
457 while (!((status = inb(MSR)) & 0x80) && --timeout)
458 udelay(100);
459 outb(val, reg);
460 }
461
sun_pci_fd_sensei(unsigned long port)462 static unsigned char sun_pci_fd_sensei(unsigned long port)
463 {
464 unsigned char result[2] = { 0x70, 0x00 };
465 unsigned char status;
466 int i = 0;
467
468 sun_pci_fd_out_byte(port, 0x08, FIFO);
469 do {
470 int timeout = 1000;
471
472 while (!((status = inb(MSR)) & 0x80) && --timeout)
473 udelay(100);
474
475 if (!timeout)
476 break;
477
478 if ((status & 0xf0) == 0xd0)
479 result[i++] = inb(FIFO);
480 else
481 break;
482 } while (i < 2);
483
484 return result[0];
485 }
486
sun_pci_fd_reset(unsigned long port)487 static void sun_pci_fd_reset(unsigned long port)
488 {
489 unsigned char mask = 0x00;
490 unsigned char status;
491 int timeout = 10000;
492
493 outb(0x80, MSR);
494 do {
495 status = sun_pci_fd_sensei(port);
496 if ((status & 0xc0) == 0xc0)
497 mask |= 1 << (status & 0x03);
498 else
499 udelay(100);
500 } while ((mask != 0x0f) && --timeout);
501 }
502
sun_pci_fd_test_drive(unsigned long port,int drive)503 static int sun_pci_fd_test_drive(unsigned long port, int drive)
504 {
505 unsigned char status, data;
506 int timeout = 1000;
507 int ready;
508
509 sun_pci_fd_reset(port);
510
511 data = (0x10 << drive) | 0x0c | drive;
512 sun_pci_fd_out_byte(port, data, DOR);
513
514 sun_pci_fd_out_byte(port, 0x07, FIFO);
515 sun_pci_fd_out_byte(port, drive & 0x03, FIFO);
516
517 do {
518 udelay(100);
519 status = sun_pci_fd_sensei(port);
520 } while (((status & 0xc0) == 0x80) && --timeout);
521
522 if (!timeout)
523 ready = 0;
524 else
525 ready = (status & 0x10) ? 0 : 1;
526
527 sun_pci_fd_reset(port);
528 return ready;
529 }
530 #undef FIFO
531 #undef MSR
532 #undef DOR
533
ebus_fdthree_p(struct device_node * dp)534 static int __init ebus_fdthree_p(struct device_node *dp)
535 {
536 if (of_node_name_eq(dp, "fdthree"))
537 return 1;
538 if (of_node_name_eq(dp, "floppy")) {
539 const char *compat;
540
541 compat = of_get_property(dp, "compatible", NULL);
542 if (compat && !strcmp(compat, "fdthree"))
543 return 1;
544 }
545 return 0;
546 }
547
sun_floppy_init(void)548 static unsigned long __init sun_floppy_init(void)
549 {
550 static int initialized = 0;
551 struct device_node *dp;
552 struct platform_device *op;
553 const char *prop;
554 char state[128];
555
556 if (initialized)
557 return sun_floppy_types[0];
558 initialized = 1;
559
560 op = NULL;
561
562 for_each_node_by_name(dp, "SUNW,fdtwo") {
563 if (!of_node_name_eq(dp->parent, "sbus"))
564 continue;
565 op = of_find_device_by_node(dp);
566 if (op)
567 break;
568 }
569 if (op) {
570 floppy_op = op;
571 FLOPPY_IRQ = op->archdata.irqs[0];
572 } else {
573 struct device_node *ebus_dp;
574 void __iomem *auxio_reg;
575 const char *state_prop;
576 unsigned long config;
577
578 dp = NULL;
579 for_each_node_by_name(ebus_dp, "ebus") {
580 for (dp = ebus_dp->child; dp; dp = dp->sibling) {
581 if (ebus_fdthree_p(dp))
582 goto found_fdthree;
583 }
584 }
585 found_fdthree:
586 if (!dp)
587 return 0;
588
589 op = of_find_device_by_node(dp);
590 if (!op)
591 return 0;
592
593 state_prop = of_get_property(op->dev.of_node, "status", NULL);
594 if (state_prop && !strncmp(state_prop, "disabled", 8))
595 return 0;
596
597 FLOPPY_IRQ = op->archdata.irqs[0];
598
599 /* Make sure the high density bit is set, some systems
600 * (most notably Ultra5/Ultra10) come up with it clear.
601 */
602 auxio_reg = (void __iomem *) op->resource[2].start;
603 writel(readl(auxio_reg)|0x2, auxio_reg);
604
605 sun_floppy_dev = &op->dev;
606
607 spin_lock_init(&sun_pci_fd_ebus_dma.lock);
608
609 /* XXX ioremap */
610 sun_pci_fd_ebus_dma.regs = (void __iomem *)
611 op->resource[1].start;
612 if (!sun_pci_fd_ebus_dma.regs)
613 return 0;
614
615 sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER |
616 EBUS_DMA_FLAG_TCI_DISABLE);
617 sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback;
618 sun_pci_fd_ebus_dma.client_cookie = NULL;
619 sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ;
620 strcpy(sun_pci_fd_ebus_dma.name, "floppy");
621 if (ebus_dma_register(&sun_pci_fd_ebus_dma))
622 return 0;
623
624 /* XXX ioremap */
625 sun_fdc = (struct sun_flpy_controller *) op->resource[0].start;
626
627 sun_fdops.fd_inb = sun_pci_fd_inb;
628 sun_fdops.fd_outb = sun_pci_fd_outb;
629
630 can_use_virtual_dma = use_virtual_dma = 0;
631 sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma;
632 sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma;
633 sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode;
634 sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr;
635 sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count;
636 sun_fdops.get_dma_residue = sun_pci_get_dma_residue;
637
638 sun_fdops.fd_request_irq = sun_pci_fd_request_irq;
639 sun_fdops.fd_free_irq = sun_pci_fd_free_irq;
640
641 sun_fdops.fd_eject = sun_pci_fd_eject;
642
643 fdc_status = (unsigned long) &sun_fdc->status_82077;
644
645 /*
646 * XXX: Find out on which machines this is really needed.
647 */
648 if (1) {
649 sun_pci_broken_drive = 1;
650 sun_fdops.fd_outb = sun_pci_fd_broken_outb;
651 }
652
653 allowed_drive_mask = 0;
654 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0))
655 sun_floppy_types[0] = 4;
656 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1))
657 sun_floppy_types[1] = 4;
658
659 /*
660 * Find NS87303 SuperIO config registers (through ecpp).
661 */
662 config = 0;
663 for (dp = ebus_dp->child; dp; dp = dp->sibling) {
664 if (of_node_name_eq(dp, "ecpp")) {
665 struct platform_device *ecpp_op;
666
667 ecpp_op = of_find_device_by_node(dp);
668 if (ecpp_op)
669 config = ecpp_op->resource[1].start;
670 goto config_done;
671 }
672 }
673 config_done:
674
675 /*
676 * Sanity check, is this really the NS87303?
677 */
678 switch (config & 0x3ff) {
679 case 0x02e:
680 case 0x15c:
681 case 0x26e:
682 case 0x398:
683 break;
684 default:
685 config = 0;
686 }
687
688 if (!config)
689 return sun_floppy_types[0];
690
691 /* Enable PC-AT mode. */
692 ns87303_modify(config, ASC, 0, 0xc0);
693
694 #ifdef PCI_FDC_SWAP_DRIVES
695 /*
696 * If only Floppy 1 is present, swap drives.
697 */
698 if (!sun_floppy_types[0] && sun_floppy_types[1]) {
699 /*
700 * Set the drive exchange bit in FCR on NS87303,
701 * make sure other bits are sane before doing so.
702 */
703 ns87303_modify(config, FER, FER_EDM, 0);
704 ns87303_modify(config, ASC, ASC_DRV2_SEL, 0);
705 ns87303_modify(config, FCR, 0, FCR_LDE);
706
707 config = sun_floppy_types[0];
708 sun_floppy_types[0] = sun_floppy_types[1];
709 sun_floppy_types[1] = config;
710
711 if (sun_pci_broken_drive != -1) {
712 sun_pci_broken_drive = 1 - sun_pci_broken_drive;
713 sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb;
714 }
715 }
716 #endif /* PCI_FDC_SWAP_DRIVES */
717
718 return sun_floppy_types[0];
719 }
720 prop = of_get_property(op->dev.of_node, "status", NULL);
721 if (prop && !strncmp(state, "disabled", 8))
722 return 0;
723
724 /*
725 * We cannot do of_ioremap here: it does request_region,
726 * which the generic floppy driver tries to do once again.
727 * But we must use the sdev resource values as they have
728 * had parent ranges applied.
729 */
730 sun_fdc = (struct sun_flpy_controller *)
731 (op->resource[0].start +
732 ((op->resource[0].flags & 0x1ffUL) << 32UL));
733
734 /* Last minute sanity check... */
735 if (sbus_readb(&sun_fdc->status1_82077) == 0xff) {
736 sun_fdc = (struct sun_flpy_controller *)-1;
737 return 0;
738 }
739
740 sun_fdops.fd_inb = sun_82077_fd_inb;
741 sun_fdops.fd_outb = sun_82077_fd_outb;
742
743 can_use_virtual_dma = use_virtual_dma = 1;
744 sun_fdops.fd_enable_dma = sun_fd_enable_dma;
745 sun_fdops.fd_disable_dma = sun_fd_disable_dma;
746 sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
747 sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
748 sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
749 sun_fdops.get_dma_residue = sun_get_dma_residue;
750
751 sun_fdops.fd_request_irq = sun_fd_request_irq;
752 sun_fdops.fd_free_irq = sun_fd_free_irq;
753
754 sun_fdops.fd_eject = sun_fd_eject;
755
756 fdc_status = (unsigned long) &sun_fdc->status_82077;
757
758 /* Success... */
759 allowed_drive_mask = 0x01;
760 sun_floppy_types[0] = 4;
761 sun_floppy_types[1] = 0;
762
763 return sun_floppy_types[0];
764 }
765
766 #define EXTRA_FLOPPY_PARAMS
767
768 static DEFINE_SPINLOCK(dma_spin_lock);
769
770 #define claim_dma_lock() \
771 ({ unsigned long flags; \
772 spin_lock_irqsave(&dma_spin_lock, flags); \
773 flags; \
774 })
775
776 #define release_dma_lock(__flags) \
777 spin_unlock_irqrestore(&dma_spin_lock, __flags);
778
779 #endif /* !(__ASM_SPARC64_FLOPPY_H) */
780
