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Sam Ravnborgf5e706a2008-07-17 21:55:51 -07001/* floppy.h: Sparc specific parts of the Floppy driver.
2 *
David S. Miller10a104f2008-08-27 01:55:54 -07003 * Copyright (C) 1996, 2007, 2008 David S. Miller (davem@davemloft.net)
Sam Ravnborgf5e706a2008-07-17 21:55:51 -07004 * 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
David S. Miller10a104f2008-08-27 01:55:54 -070012#include <linux/of.h>
13#include <linux/of_device.h>
David S. Miller3ae627a2008-08-29 23:26:23 -070014#include <linux/dma-mapping.h>
Sam Ravnborgf5e706a2008-07-17 21:55:51 -070015
Sam Ravnborgf5e706a2008-07-17 21:55:51 -070016#include <asm/auxio.h>
Sam Ravnborgf5e706a2008-07-17 21:55:51 -070017
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;
David S. Miller10a104f2008-08-27 01:55:54 -070046static struct of_device *floppy_op = NULL;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -070047
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);
114 };
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;
138 };
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;
164 if (pdma_base) {
165 mmu_unlockarea(pdma_base, pdma_areasize);
166 pdma_base = NULL;
167 }
168}
169
170static void sun_fd_set_dma_mode(int mode)
171{
172 switch(mode) {
173 case DMA_MODE_READ:
174 doing_pdma = 1;
175 break;
176 case DMA_MODE_WRITE:
177 doing_pdma = 2;
178 break;
179 default:
180 printk("Unknown dma mode %d\n", mode);
181 panic("floppy: Giving up...");
182 }
183}
184
185static void sun_fd_set_dma_addr(char *buffer)
186{
187 pdma_vaddr = buffer;
188}
189
190static void sun_fd_set_dma_count(int length)
191{
192 pdma_size = length;
193}
194
195static void sun_fd_enable_dma(void)
196{
197 pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size);
198 pdma_base = pdma_vaddr;
199 pdma_areasize = pdma_size;
200}
201
202irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie)
203{
204 if (likely(doing_pdma)) {
205 void __iomem *stat = (void __iomem *) fdc_status;
206 unsigned char *vaddr = pdma_vaddr;
207 unsigned long size = pdma_size;
208 u8 val;
209
210 while (size) {
211 val = readb(stat);
212 if (unlikely(!(val & 0x80))) {
213 pdma_vaddr = vaddr;
214 pdma_size = size;
215 return IRQ_HANDLED;
216 }
217 if (unlikely(!(val & 0x20))) {
218 pdma_vaddr = vaddr;
219 pdma_size = size;
220 doing_pdma = 0;
221 goto main_interrupt;
222 }
223 if (val & 0x40) {
224 /* read */
225 *vaddr++ = readb(stat + 1);
226 } else {
227 unsigned char data = *vaddr++;
228
229 /* write */
230 writeb(data, stat + 1);
231 }
232 size--;
233 }
234
235 pdma_vaddr = vaddr;
236 pdma_size = size;
237
238 /* Send Terminal Count pulse to floppy controller. */
239 val = readb(auxio_register);
240 val |= AUXIO_AUX1_FTCNT;
241 writeb(val, auxio_register);
242 val &= ~AUXIO_AUX1_FTCNT;
243 writeb(val, auxio_register);
244
245 doing_pdma = 0;
246 }
247
248main_interrupt:
249 return floppy_interrupt(irq, dev_cookie);
250}
251
252static int sun_fd_request_irq(void)
253{
254 static int once = 0;
255 int error;
256
257 if(!once) {
258 once = 1;
259
260 error = request_irq(FLOPPY_IRQ, sparc_floppy_irq,
261 IRQF_DISABLED, "floppy", NULL);
262
263 return ((error == 0) ? 0 : -1);
264 }
265 return 0;
266}
267
268static void sun_fd_free_irq(void)
269{
270}
271
272static unsigned int sun_get_dma_residue(void)
273{
274 /* XXX This isn't really correct. XXX */
275 return 0;
276}
277
278static int sun_fd_eject(int drive)
279{
280 set_dor(0x00, 0xff, 0x90);
281 udelay(500);
282 set_dor(0x00, 0x6f, 0x00);
283 udelay(500);
284 return 0;
285}
286
David S. Milleraae7fb82008-08-29 23:10:21 -0700287#include <asm/ebus_dma.h>
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700288#include <asm/ns87303.h>
289
290static struct ebus_dma_info sun_pci_fd_ebus_dma;
David S. Miller3ae627a2008-08-29 23:26:23 -0700291static struct device *sun_floppy_dev;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700292static int sun_pci_broken_drive = -1;
293
294struct sun_pci_dma_op {
295 unsigned int addr;
296 int len;
297 int direction;
298 char *buf;
299};
300static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL};
301static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL};
302
303extern irqreturn_t floppy_interrupt(int irq, void *dev_id);
304
305static unsigned char sun_pci_fd_inb(unsigned long port)
306{
307 udelay(5);
308 return inb(port);
309}
310
311static void sun_pci_fd_outb(unsigned char val, unsigned long port)
312{
313 udelay(5);
314 outb(val, port);
315}
316
317static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port)
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 (port == ((unsigned long)sun_fdc) + 2) {
328 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) {
329 val |= 0x10;
330 }
331 }
332 outb(val, port);
333}
334
335#ifdef PCI_FDC_SWAP_DRIVES
336static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port)
337{
338 udelay(5);
339 /*
340 * XXX: Due to SUN's broken floppy connector on AX and AXi
341 * we need to turn on MOTOR_0 also, if the floppy is
342 * jumpered to DS1 (like most PC floppies are). I hope
343 * this does not hurt correct hardware like the AXmp.
344 * (Eddie, Sep 12 1998).
345 */
346 if (port == ((unsigned long)sun_fdc) + 2) {
347 if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) {
348 val &= ~(0x03);
349 val |= 0x21;
350 }
351 }
352 outb(val, port);
353}
354#endif /* PCI_FDC_SWAP_DRIVES */
355
356static void sun_pci_fd_enable_dma(void)
357{
358 BUG_ON((NULL == sun_pci_dma_pending.buf) ||
359 (0 == sun_pci_dma_pending.len) ||
360 (0 == sun_pci_dma_pending.direction));
361
362 sun_pci_dma_current.buf = sun_pci_dma_pending.buf;
363 sun_pci_dma_current.len = sun_pci_dma_pending.len;
364 sun_pci_dma_current.direction = sun_pci_dma_pending.direction;
365
366 sun_pci_dma_pending.buf = NULL;
367 sun_pci_dma_pending.len = 0;
368 sun_pci_dma_pending.direction = 0;
369 sun_pci_dma_pending.addr = -1U;
370
371 sun_pci_dma_current.addr =
David S. Miller3ae627a2008-08-29 23:26:23 -0700372 dma_map_single(sun_floppy_dev,
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700373 sun_pci_dma_current.buf,
374 sun_pci_dma_current.len,
375 sun_pci_dma_current.direction);
376
377 ebus_dma_enable(&sun_pci_fd_ebus_dma, 1);
378
379 if (ebus_dma_request(&sun_pci_fd_ebus_dma,
380 sun_pci_dma_current.addr,
381 sun_pci_dma_current.len))
382 BUG();
383}
384
385static void sun_pci_fd_disable_dma(void)
386{
387 ebus_dma_enable(&sun_pci_fd_ebus_dma, 0);
388 if (sun_pci_dma_current.addr != -1U)
David S. Miller3ae627a2008-08-29 23:26:23 -0700389 dma_unmap_single(sun_floppy_dev,
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700390 sun_pci_dma_current.addr,
391 sun_pci_dma_current.len,
392 sun_pci_dma_current.direction);
393 sun_pci_dma_current.addr = -1U;
394}
395
396static void sun_pci_fd_set_dma_mode(int mode)
397{
398 if (mode == DMA_MODE_WRITE)
David S. Miller3ae627a2008-08-29 23:26:23 -0700399 sun_pci_dma_pending.direction = DMA_TO_DEVICE;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700400 else
David S. Miller3ae627a2008-08-29 23:26:23 -0700401 sun_pci_dma_pending.direction = DMA_FROM_DEVICE;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700402
403 ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE);
404}
405
406static void sun_pci_fd_set_dma_count(int length)
407{
408 sun_pci_dma_pending.len = length;
409}
410
411static void sun_pci_fd_set_dma_addr(char *buffer)
412{
413 sun_pci_dma_pending.buf = buffer;
414}
415
416static unsigned int sun_pci_get_dma_residue(void)
417{
418 return ebus_dma_residue(&sun_pci_fd_ebus_dma);
419}
420
421static int sun_pci_fd_request_irq(void)
422{
423 return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1);
424}
425
426static void sun_pci_fd_free_irq(void)
427{
428 ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0);
429}
430
431static int sun_pci_fd_eject(int drive)
432{
433 return -EINVAL;
434}
435
436void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie)
437{
438 floppy_interrupt(0, NULL);
439}
440
441/*
442 * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI,
443 * even if this is configured using DS1, thus looks like /dev/fd1 with
444 * the cabling used in Ultras.
445 */
446#define DOR (port + 2)
447#define MSR (port + 4)
448#define FIFO (port + 5)
449
450static void sun_pci_fd_out_byte(unsigned long port, unsigned char val,
451 unsigned long reg)
452{
453 unsigned char status;
454 int timeout = 1000;
455
456 while (!((status = inb(MSR)) & 0x80) && --timeout)
457 udelay(100);
458 outb(val, reg);
459}
460
461static unsigned char sun_pci_fd_sensei(unsigned long port)
462{
463 unsigned char result[2] = { 0x70, 0x00 };
464 unsigned char status;
465 int i = 0;
466
467 sun_pci_fd_out_byte(port, 0x08, FIFO);
468 do {
469 int timeout = 1000;
470
471 while (!((status = inb(MSR)) & 0x80) && --timeout)
472 udelay(100);
473
474 if (!timeout)
475 break;
476
477 if ((status & 0xf0) == 0xd0)
478 result[i++] = inb(FIFO);
479 else
480 break;
481 } while (i < 2);
482
483 return result[0];
484}
485
486static void sun_pci_fd_reset(unsigned long port)
487{
488 unsigned char mask = 0x00;
489 unsigned char status;
490 int timeout = 10000;
491
492 outb(0x80, MSR);
493 do {
494 status = sun_pci_fd_sensei(port);
495 if ((status & 0xc0) == 0xc0)
496 mask |= 1 << (status & 0x03);
497 else
498 udelay(100);
499 } while ((mask != 0x0f) && --timeout);
500}
501
502static int sun_pci_fd_test_drive(unsigned long port, int drive)
503{
504 unsigned char status, data;
505 int timeout = 1000;
506 int ready;
507
508 sun_pci_fd_reset(port);
509
510 data = (0x10 << drive) | 0x0c | drive;
511 sun_pci_fd_out_byte(port, data, DOR);
512
513 sun_pci_fd_out_byte(port, 0x07, FIFO);
514 sun_pci_fd_out_byte(port, drive & 0x03, FIFO);
515
516 do {
517 udelay(100);
518 status = sun_pci_fd_sensei(port);
519 } while (((status & 0xc0) == 0x80) && --timeout);
520
521 if (!timeout)
522 ready = 0;
523 else
524 ready = (status & 0x10) ? 0 : 1;
525
526 sun_pci_fd_reset(port);
527 return ready;
528}
529#undef FIFO
530#undef MSR
531#undef DOR
532
David S. Miller3ae627a2008-08-29 23:26:23 -0700533static int __init ebus_fdthree_p(struct device_node *dp)
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700534{
David S. Miller3ae627a2008-08-29 23:26:23 -0700535 if (!strcmp(dp->name, "fdthree"))
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700536 return 1;
David S. Miller3ae627a2008-08-29 23:26:23 -0700537 if (!strcmp(dp->name, "floppy")) {
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700538 const char *compat;
539
David S. Miller3ae627a2008-08-29 23:26:23 -0700540 compat = of_get_property(dp, "compatible", NULL);
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700541 if (compat && !strcmp(compat, "fdthree"))
542 return 1;
543 }
544 return 0;
545}
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700546
547static unsigned long __init sun_floppy_init(void)
548{
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700549 static int initialized = 0;
David S. Miller10a104f2008-08-27 01:55:54 -0700550 struct device_node *dp;
551 struct of_device *op;
552 const char *prop;
553 char state[128];
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700554
555 if (initialized)
556 return sun_floppy_types[0];
557 initialized = 1;
558
David S. Miller10a104f2008-08-27 01:55:54 -0700559 op = NULL;
560
561 for_each_node_by_name(dp, "SUNW,fdtwo") {
562 if (strcmp(dp->parent->name, "sbus"))
563 continue;
564 op = of_find_device_by_node(dp);
565 if (op)
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700566 break;
567 }
David S. Miller10a104f2008-08-27 01:55:54 -0700568 if (op) {
569 floppy_op = op;
570 FLOPPY_IRQ = op->irqs[0];
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700571 } else {
David S. Miller3ae627a2008-08-29 23:26:23 -0700572 struct device_node *ebus_dp;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700573 void __iomem *auxio_reg;
574 const char *state_prop;
David S. Miller3ae627a2008-08-29 23:26:23 -0700575 unsigned long config;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700576
David S. Miller3ae627a2008-08-29 23:26:23 -0700577 dp = NULL;
578 for_each_node_by_name(ebus_dp, "ebus") {
579 for (dp = ebus_dp->child; dp; dp = dp->sibling) {
580 if (ebus_fdthree_p(dp))
581 goto found_fdthree;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700582 }
583 }
David S. Miller3ae627a2008-08-29 23:26:23 -0700584 found_fdthree:
585 if (!dp)
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700586 return 0;
587
David S. Miller3ae627a2008-08-29 23:26:23 -0700588 op = of_find_device_by_node(dp);
589 if (!op)
590 return 0;
David S. Miller10a104f2008-08-27 01:55:54 -0700591
592 state_prop = of_get_property(op->node, "status", NULL);
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700593 if (state_prop && !strncmp(state_prop, "disabled", 8))
594 return 0;
595
David S. Miller3ae627a2008-08-29 23:26:23 -0700596 FLOPPY_IRQ = op->irqs[0];
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700597
598 /* Make sure the high density bit is set, some systems
599 * (most notably Ultra5/Ultra10) come up with it clear.
600 */
David S. Miller3ae627a2008-08-29 23:26:23 -0700601 auxio_reg = (void __iomem *) op->resource[2].start;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700602 writel(readl(auxio_reg)|0x2, auxio_reg);
603
David S. Miller3ae627a2008-08-29 23:26:23 -0700604 sun_floppy_dev = &op->dev;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700605
606 spin_lock_init(&sun_pci_fd_ebus_dma.lock);
607
608 /* XXX ioremap */
609 sun_pci_fd_ebus_dma.regs = (void __iomem *)
David S. Miller3ae627a2008-08-29 23:26:23 -0700610 op->resource[1].start;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700611 if (!sun_pci_fd_ebus_dma.regs)
612 return 0;
613
614 sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER |
615 EBUS_DMA_FLAG_TCI_DISABLE);
616 sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback;
617 sun_pci_fd_ebus_dma.client_cookie = NULL;
618 sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ;
619 strcpy(sun_pci_fd_ebus_dma.name, "floppy");
620 if (ebus_dma_register(&sun_pci_fd_ebus_dma))
621 return 0;
622
623 /* XXX ioremap */
David S. Miller3ae627a2008-08-29 23:26:23 -0700624 sun_fdc = (struct sun_flpy_controller *) op->resource[0].start;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700625
626 sun_fdops.fd_inb = sun_pci_fd_inb;
627 sun_fdops.fd_outb = sun_pci_fd_outb;
628
629 can_use_virtual_dma = use_virtual_dma = 0;
630 sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma;
631 sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma;
632 sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode;
633 sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr;
634 sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count;
635 sun_fdops.get_dma_residue = sun_pci_get_dma_residue;
636
637 sun_fdops.fd_request_irq = sun_pci_fd_request_irq;
638 sun_fdops.fd_free_irq = sun_pci_fd_free_irq;
639
640 sun_fdops.fd_eject = sun_pci_fd_eject;
641
642 fdc_status = (unsigned long) &sun_fdc->status_82077;
643
644 /*
645 * XXX: Find out on which machines this is really needed.
646 */
647 if (1) {
648 sun_pci_broken_drive = 1;
649 sun_fdops.fd_outb = sun_pci_fd_broken_outb;
650 }
651
652 allowed_drive_mask = 0;
653 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0))
654 sun_floppy_types[0] = 4;
655 if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1))
656 sun_floppy_types[1] = 4;
657
658 /*
659 * Find NS87303 SuperIO config registers (through ecpp).
660 */
David S. Miller3ae627a2008-08-29 23:26:23 -0700661 config = 0;
662 for (dp = ebus_dp->child; dp; dp = dp->sibling) {
663 if (!strcmp(dp->name, "ecpp")) {
664 struct of_device *ecpp_op;
665
666 ecpp_op = of_find_device_by_node(dp);
667 if (ecpp_op)
668 config = ecpp_op->resource[1].start;
669 goto config_done;
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700670 }
671 }
672 config_done:
673
674 /*
675 * Sanity check, is this really the NS87303?
676 */
677 switch (config & 0x3ff) {
678 case 0x02e:
679 case 0x15c:
680 case 0x26e:
681 case 0x398:
682 break;
683 default:
684 config = 0;
685 }
686
687 if (!config)
688 return sun_floppy_types[0];
689
690 /* Enable PC-AT mode. */
691 ns87303_modify(config, ASC, 0, 0xc0);
692
693#ifdef PCI_FDC_SWAP_DRIVES
694 /*
695 * If only Floppy 1 is present, swap drives.
696 */
697 if (!sun_floppy_types[0] && sun_floppy_types[1]) {
698 /*
699 * Set the drive exchange bit in FCR on NS87303,
700 * make sure other bits are sane before doing so.
701 */
702 ns87303_modify(config, FER, FER_EDM, 0);
703 ns87303_modify(config, ASC, ASC_DRV2_SEL, 0);
704 ns87303_modify(config, FCR, 0, FCR_LDE);
705
706 config = sun_floppy_types[0];
707 sun_floppy_types[0] = sun_floppy_types[1];
708 sun_floppy_types[1] = config;
709
710 if (sun_pci_broken_drive != -1) {
711 sun_pci_broken_drive = 1 - sun_pci_broken_drive;
712 sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb;
713 }
714 }
715#endif /* PCI_FDC_SWAP_DRIVES */
716
717 return sun_floppy_types[0];
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700718 }
David S. Miller10a104f2008-08-27 01:55:54 -0700719 prop = of_get_property(op->node, "status", NULL);
720 if (prop && !strncmp(state, "disabled", 8))
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700721 return 0;
722
723 /*
David S. Miller10a104f2008-08-27 01:55:54 -0700724 * We cannot do of_ioremap here: it does request_region,
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700725 * which the generic floppy driver tries to do once again.
726 * But we must use the sdev resource values as they have
727 * had parent ranges applied.
728 */
729 sun_fdc = (struct sun_flpy_controller *)
David S. Miller10a104f2008-08-27 01:55:54 -0700730 (op->resource[0].start +
731 ((op->resource[0].flags & 0x1ffUL) << 32UL));
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700732
733 /* Last minute sanity check... */
David S. Miller10a104f2008-08-27 01:55:54 -0700734 if (sbus_readb(&sun_fdc->status1_82077) == 0xff) {
Sam Ravnborgf5e706a2008-07-17 21:55:51 -0700735 sun_fdc = (struct sun_flpy_controller *)-1;
736 return 0;
737 }
738
739 sun_fdops.fd_inb = sun_82077_fd_inb;
740 sun_fdops.fd_outb = sun_82077_fd_outb;
741
742 can_use_virtual_dma = use_virtual_dma = 1;
743 sun_fdops.fd_enable_dma = sun_fd_enable_dma;
744 sun_fdops.fd_disable_dma = sun_fd_disable_dma;
745 sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode;
746 sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr;
747 sun_fdops.fd_set_dma_count = sun_fd_set_dma_count;
748 sun_fdops.get_dma_residue = sun_get_dma_residue;
749
750 sun_fdops.fd_request_irq = sun_fd_request_irq;
751 sun_fdops.fd_free_irq = sun_fd_free_irq;
752
753 sun_fdops.fd_eject = sun_fd_eject;
754
755 fdc_status = (unsigned long) &sun_fdc->status_82077;
756
757 /* Success... */
758 allowed_drive_mask = 0x01;
759 sun_floppy_types[0] = 4;
760 sun_floppy_types[1] = 0;
761
762 return sun_floppy_types[0];
763}
764
765#define EXTRA_FLOPPY_PARAMS
766
767static DEFINE_SPINLOCK(dma_spin_lock);
768
769#define claim_dma_lock() \
770({ unsigned long flags; \
771 spin_lock_irqsave(&dma_spin_lock, flags); \
772 flags; \
773})
774
775#define release_dma_lock(__flags) \
776 spin_unlock_irqrestore(&dma_spin_lock, __flags);
777
778#endif /* !(__ASM_SPARC64_FLOPPY_H) */