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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
f5e706ad SR |
2 | /* floppy.h: Sparc specific parts of the Floppy driver. |
3 | * | |
10a104f9 | 4 | * Copyright (C) 1996, 2007, 2008 David S. Miller (davem@davemloft.net) |
f5e706ad SR |
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 | ||
10a104f9 DM |
13 | #include <linux/of.h> |
14 | #include <linux/of_device.h> | |
3ae627a1 | 15 | #include <linux/dma-mapping.h> |
f5e706ad | 16 | |
f5e706ad | 17 | #include <asm/auxio.h> |
f5e706ad SR |
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; | |
94a0cb1f | 47 | static struct platform_device *floppy_op = NULL; |
f5e706ad SR |
48 | |
49 | struct sun_floppy_ops { | |
50 | unsigned char (*fd_inb) (unsigned long port); | |
51 | void (*fd_outb) (unsigned char value, unsigned long port); | |
52 | void (*fd_enable_dma) (void); | |
53 | void (*fd_disable_dma) (void); | |
54 | void (*fd_set_dma_mode) (int); | |
55 | void (*fd_set_dma_addr) (char *); | |
56 | void (*fd_set_dma_count) (int); | |
57 | unsigned int (*get_dma_residue) (void); | |
58 | int (*fd_request_irq) (void); | |
59 | void (*fd_free_irq) (void); | |
60 | int (*fd_eject) (int); | |
61 | }; | |
62 | ||
63 | static struct sun_floppy_ops sun_fdops; | |
64 | ||
65 | #define fd_inb(port) sun_fdops.fd_inb(port) | |
66 | #define fd_outb(value,port) sun_fdops.fd_outb(value,port) | |
67 | #define fd_enable_dma() sun_fdops.fd_enable_dma() | |
68 | #define fd_disable_dma() sun_fdops.fd_disable_dma() | |
69 | #define fd_request_dma() (0) /* nothing... */ | |
70 | #define fd_free_dma() /* nothing... */ | |
71 | #define fd_clear_dma_ff() /* nothing... */ | |
72 | #define fd_set_dma_mode(mode) sun_fdops.fd_set_dma_mode(mode) | |
73 | #define fd_set_dma_addr(addr) sun_fdops.fd_set_dma_addr(addr) | |
74 | #define fd_set_dma_count(count) sun_fdops.fd_set_dma_count(count) | |
75 | #define get_dma_residue(x) sun_fdops.get_dma_residue() | |
76 | #define fd_cacheflush(addr, size) /* nothing... */ | |
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 | ||
101 | static unsigned char sun_82077_fd_inb(unsigned long port) | |
102 | { | |
103 | udelay(5); | |
104 | switch(port & 7) { | |
105 | default: | |
106 | printk("floppy: Asked to read unknown port %lx\n", port); | |
107 | panic("floppy: Port bolixed."); | |
108 | case 4: /* FD_STATUS */ | |
109 | return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA; | |
110 | case 5: /* FD_DATA */ | |
111 | return sbus_readb(&sun_fdc->data_82077); | |
112 | case 7: /* FD_DIR */ | |
113 | /* XXX: Is DCL on 0x80 in sun4m? */ | |
114 | return sbus_readb(&sun_fdc->dir_82077); | |
6cb79b3f | 115 | } |
f5e706ad SR |
116 | panic("sun_82072_fd_inb: How did I get here?"); |
117 | } | |
118 | ||
119 | static void sun_82077_fd_outb(unsigned char value, unsigned long port) | |
120 | { | |
121 | udelay(5); | |
122 | switch(port & 7) { | |
123 | default: | |
124 | printk("floppy: Asked to write to unknown port %lx\n", port); | |
125 | panic("floppy: Port bolixed."); | |
126 | case 2: /* FD_DOR */ | |
127 | /* Happily, the 82077 has a real DOR register. */ | |
128 | sbus_writeb(value, &sun_fdc->dor_82077); | |
129 | break; | |
130 | case 5: /* FD_DATA */ | |
131 | sbus_writeb(value, &sun_fdc->data_82077); | |
132 | break; | |
133 | case 7: /* FD_DCR */ | |
134 | sbus_writeb(value, &sun_fdc->dcr_82077); | |
135 | break; | |
136 | case 4: /* FD_STATUS */ | |
137 | sbus_writeb(value, &sun_fdc->status_82077); | |
138 | break; | |
6cb79b3f | 139 | } |
f5e706ad SR |
140 | return; |
141 | } | |
142 | ||
143 | /* For pseudo-dma (Sun floppy drives have no real DMA available to | |
144 | * them so we must eat the data fifo bytes directly ourselves) we have | |
145 | * three state variables. doing_pdma tells our inline low-level | |
146 | * assembly floppy interrupt entry point whether it should sit and eat | |
147 | * bytes from the fifo or just transfer control up to the higher level | |
148 | * floppy interrupt c-code. I tried very hard but I could not get the | |
149 | * pseudo-dma to work in c-code without getting many overruns and | |
150 | * underruns. If non-zero, doing_pdma encodes the direction of | |
151 | * the transfer for debugging. 1=read 2=write | |
152 | */ | |
153 | unsigned char *pdma_vaddr; | |
154 | unsigned long pdma_size; | |
155 | volatile int doing_pdma = 0; | |
156 | ||
157 | /* This is software state */ | |
158 | char *pdma_base = NULL; | |
159 | unsigned long pdma_areasize; | |
160 | ||
161 | /* Common routines to all controller types on the Sparc. */ | |
162 | static void sun_fd_disable_dma(void) | |
163 | { | |
164 | doing_pdma = 0; | |
679bea5e | 165 | pdma_base = NULL; |
f5e706ad SR |
166 | } |
167 | ||
168 | static void sun_fd_set_dma_mode(int mode) | |
169 | { | |
170 | switch(mode) { | |
171 | case DMA_MODE_READ: | |
172 | doing_pdma = 1; | |
173 | break; | |
174 | case DMA_MODE_WRITE: | |
175 | doing_pdma = 2; | |
176 | break; | |
177 | default: | |
178 | printk("Unknown dma mode %d\n", mode); | |
179 | panic("floppy: Giving up..."); | |
180 | } | |
181 | } | |
182 | ||
183 | static void sun_fd_set_dma_addr(char *buffer) | |
184 | { | |
185 | pdma_vaddr = buffer; | |
186 | } | |
187 | ||
188 | static void sun_fd_set_dma_count(int length) | |
189 | { | |
190 | pdma_size = length; | |
191 | } | |
192 | ||
193 | static void sun_fd_enable_dma(void) | |
194 | { | |
f5e706ad SR |
195 | pdma_base = pdma_vaddr; |
196 | pdma_areasize = pdma_size; | |
197 | } | |
198 | ||
199 | irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie) | |
200 | { | |
201 | if (likely(doing_pdma)) { | |
202 | void __iomem *stat = (void __iomem *) fdc_status; | |
203 | unsigned char *vaddr = pdma_vaddr; | |
204 | unsigned long size = pdma_size; | |
205 | u8 val; | |
206 | ||
207 | while (size) { | |
208 | val = readb(stat); | |
209 | if (unlikely(!(val & 0x80))) { | |
210 | pdma_vaddr = vaddr; | |
211 | pdma_size = size; | |
212 | return IRQ_HANDLED; | |
213 | } | |
214 | if (unlikely(!(val & 0x20))) { | |
215 | pdma_vaddr = vaddr; | |
216 | pdma_size = size; | |
217 | doing_pdma = 0; | |
218 | goto main_interrupt; | |
219 | } | |
220 | if (val & 0x40) { | |
221 | /* read */ | |
222 | *vaddr++ = readb(stat + 1); | |
223 | } else { | |
224 | unsigned char data = *vaddr++; | |
225 | ||
226 | /* write */ | |
227 | writeb(data, stat + 1); | |
228 | } | |
229 | size--; | |
230 | } | |
231 | ||
232 | pdma_vaddr = vaddr; | |
233 | pdma_size = size; | |
234 | ||
235 | /* Send Terminal Count pulse to floppy controller. */ | |
236 | val = readb(auxio_register); | |
237 | val |= AUXIO_AUX1_FTCNT; | |
238 | writeb(val, auxio_register); | |
239 | val &= ~AUXIO_AUX1_FTCNT; | |
240 | writeb(val, auxio_register); | |
241 | ||
242 | doing_pdma = 0; | |
243 | } | |
244 | ||
245 | main_interrupt: | |
246 | return floppy_interrupt(irq, dev_cookie); | |
247 | } | |
248 | ||
249 | static int sun_fd_request_irq(void) | |
250 | { | |
251 | static int once = 0; | |
252 | int error; | |
253 | ||
254 | if(!once) { | |
255 | once = 1; | |
256 | ||
257 | error = request_irq(FLOPPY_IRQ, sparc_floppy_irq, | |
d2f09b1c | 258 | 0, "floppy", NULL); |
f5e706ad SR |
259 | |
260 | return ((error == 0) ? 0 : -1); | |
261 | } | |
262 | return 0; | |
263 | } | |
264 | ||
265 | static void sun_fd_free_irq(void) | |
266 | { | |
267 | } | |
268 | ||
269 | static unsigned int sun_get_dma_residue(void) | |
270 | { | |
271 | /* XXX This isn't really correct. XXX */ | |
272 | return 0; | |
273 | } | |
274 | ||
275 | static int sun_fd_eject(int drive) | |
276 | { | |
277 | set_dor(0x00, 0xff, 0x90); | |
278 | udelay(500); | |
279 | set_dor(0x00, 0x6f, 0x00); | |
280 | udelay(500); | |
281 | return 0; | |
282 | } | |
283 | ||
aae7fb87 | 284 | #include <asm/ebus_dma.h> |
f5e706ad SR |
285 | #include <asm/ns87303.h> |
286 | ||
287 | static struct ebus_dma_info sun_pci_fd_ebus_dma; | |
3ae627a1 | 288 | static struct device *sun_floppy_dev; |
f5e706ad SR |
289 | static int sun_pci_broken_drive = -1; |
290 | ||
291 | struct sun_pci_dma_op { | |
292 | unsigned int addr; | |
293 | int len; | |
294 | int direction; | |
295 | char *buf; | |
296 | }; | |
297 | static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL}; | |
298 | static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL}; | |
299 | ||
f05a6865 | 300 | irqreturn_t floppy_interrupt(int irq, void *dev_id); |
f5e706ad SR |
301 | |
302 | static unsigned char sun_pci_fd_inb(unsigned long port) | |
303 | { | |
304 | udelay(5); | |
305 | return inb(port); | |
306 | } | |
307 | ||
308 | static void sun_pci_fd_outb(unsigned char val, unsigned long port) | |
309 | { | |
310 | udelay(5); | |
311 | outb(val, port); | |
312 | } | |
313 | ||
314 | static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port) | |
315 | { | |
316 | udelay(5); | |
317 | /* | |
318 | * XXX: Due to SUN's broken floppy connector on AX and AXi | |
319 | * we need to turn on MOTOR_0 also, if the floppy is | |
320 | * jumpered to DS1 (like most PC floppies are). I hope | |
321 | * this does not hurt correct hardware like the AXmp. | |
322 | * (Eddie, Sep 12 1998). | |
323 | */ | |
324 | if (port == ((unsigned long)sun_fdc) + 2) { | |
325 | if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) { | |
326 | val |= 0x10; | |
327 | } | |
328 | } | |
329 | outb(val, port); | |
330 | } | |
331 | ||
332 | #ifdef PCI_FDC_SWAP_DRIVES | |
333 | static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port) | |
334 | { | |
335 | udelay(5); | |
336 | /* | |
337 | * XXX: Due to SUN's broken floppy connector on AX and AXi | |
338 | * we need to turn on MOTOR_0 also, if the floppy is | |
339 | * jumpered to DS1 (like most PC floppies are). I hope | |
340 | * this does not hurt correct hardware like the AXmp. | |
341 | * (Eddie, Sep 12 1998). | |
342 | */ | |
343 | if (port == ((unsigned long)sun_fdc) + 2) { | |
344 | if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) { | |
345 | val &= ~(0x03); | |
346 | val |= 0x21; | |
347 | } | |
348 | } | |
349 | outb(val, port); | |
350 | } | |
351 | #endif /* PCI_FDC_SWAP_DRIVES */ | |
352 | ||
353 | static void sun_pci_fd_enable_dma(void) | |
354 | { | |
355 | BUG_ON((NULL == sun_pci_dma_pending.buf) || | |
356 | (0 == sun_pci_dma_pending.len) || | |
357 | (0 == sun_pci_dma_pending.direction)); | |
358 | ||
359 | sun_pci_dma_current.buf = sun_pci_dma_pending.buf; | |
360 | sun_pci_dma_current.len = sun_pci_dma_pending.len; | |
361 | sun_pci_dma_current.direction = sun_pci_dma_pending.direction; | |
362 | ||
363 | sun_pci_dma_pending.buf = NULL; | |
364 | sun_pci_dma_pending.len = 0; | |
365 | sun_pci_dma_pending.direction = 0; | |
366 | sun_pci_dma_pending.addr = -1U; | |
367 | ||
368 | sun_pci_dma_current.addr = | |
3ae627a1 | 369 | dma_map_single(sun_floppy_dev, |
f5e706ad SR |
370 | sun_pci_dma_current.buf, |
371 | sun_pci_dma_current.len, | |
372 | sun_pci_dma_current.direction); | |
373 | ||
374 | ebus_dma_enable(&sun_pci_fd_ebus_dma, 1); | |
375 | ||
376 | if (ebus_dma_request(&sun_pci_fd_ebus_dma, | |
377 | sun_pci_dma_current.addr, | |
378 | sun_pci_dma_current.len)) | |
379 | BUG(); | |
380 | } | |
381 | ||
382 | static void sun_pci_fd_disable_dma(void) | |
383 | { | |
384 | ebus_dma_enable(&sun_pci_fd_ebus_dma, 0); | |
385 | if (sun_pci_dma_current.addr != -1U) | |
3ae627a1 | 386 | dma_unmap_single(sun_floppy_dev, |
f5e706ad SR |
387 | sun_pci_dma_current.addr, |
388 | sun_pci_dma_current.len, | |
389 | sun_pci_dma_current.direction); | |
390 | sun_pci_dma_current.addr = -1U; | |
391 | } | |
392 | ||
393 | static void sun_pci_fd_set_dma_mode(int mode) | |
394 | { | |
395 | if (mode == DMA_MODE_WRITE) | |
3ae627a1 | 396 | sun_pci_dma_pending.direction = DMA_TO_DEVICE; |
f5e706ad | 397 | else |
3ae627a1 | 398 | sun_pci_dma_pending.direction = DMA_FROM_DEVICE; |
f5e706ad SR |
399 | |
400 | ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE); | |
401 | } | |
402 | ||
403 | static void sun_pci_fd_set_dma_count(int length) | |
404 | { | |
405 | sun_pci_dma_pending.len = length; | |
406 | } | |
407 | ||
408 | static void sun_pci_fd_set_dma_addr(char *buffer) | |
409 | { | |
410 | sun_pci_dma_pending.buf = buffer; | |
411 | } | |
412 | ||
413 | static unsigned int sun_pci_get_dma_residue(void) | |
414 | { | |
415 | return ebus_dma_residue(&sun_pci_fd_ebus_dma); | |
416 | } | |
417 | ||
418 | static int sun_pci_fd_request_irq(void) | |
419 | { | |
420 | return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1); | |
421 | } | |
422 | ||
423 | static void sun_pci_fd_free_irq(void) | |
424 | { | |
425 | ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0); | |
426 | } | |
427 | ||
428 | static int sun_pci_fd_eject(int drive) | |
429 | { | |
430 | return -EINVAL; | |
431 | } | |
432 | ||
433 | void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie) | |
434 | { | |
435 | floppy_interrupt(0, NULL); | |
436 | } | |
437 | ||
438 | /* | |
439 | * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI, | |
440 | * even if this is configured using DS1, thus looks like /dev/fd1 with | |
441 | * the cabling used in Ultras. | |
442 | */ | |
443 | #define DOR (port + 2) | |
444 | #define MSR (port + 4) | |
445 | #define FIFO (port + 5) | |
446 | ||
447 | static void sun_pci_fd_out_byte(unsigned long port, unsigned char val, | |
448 | unsigned long reg) | |
449 | { | |
450 | unsigned char status; | |
451 | int timeout = 1000; | |
452 | ||
453 | while (!((status = inb(MSR)) & 0x80) && --timeout) | |
454 | udelay(100); | |
455 | outb(val, reg); | |
456 | } | |
457 | ||
458 | static unsigned char sun_pci_fd_sensei(unsigned long port) | |
459 | { | |
460 | unsigned char result[2] = { 0x70, 0x00 }; | |
461 | unsigned char status; | |
462 | int i = 0; | |
463 | ||
464 | sun_pci_fd_out_byte(port, 0x08, FIFO); | |
465 | do { | |
466 | int timeout = 1000; | |
467 | ||
468 | while (!((status = inb(MSR)) & 0x80) && --timeout) | |
469 | udelay(100); | |
470 | ||
471 | if (!timeout) | |
472 | break; | |
473 | ||
474 | if ((status & 0xf0) == 0xd0) | |
475 | result[i++] = inb(FIFO); | |
476 | else | |
477 | break; | |
478 | } while (i < 2); | |
479 | ||
480 | return result[0]; | |
481 | } | |
482 | ||
483 | static void sun_pci_fd_reset(unsigned long port) | |
484 | { | |
485 | unsigned char mask = 0x00; | |
486 | unsigned char status; | |
487 | int timeout = 10000; | |
488 | ||
489 | outb(0x80, MSR); | |
490 | do { | |
491 | status = sun_pci_fd_sensei(port); | |
492 | if ((status & 0xc0) == 0xc0) | |
493 | mask |= 1 << (status & 0x03); | |
494 | else | |
495 | udelay(100); | |
496 | } while ((mask != 0x0f) && --timeout); | |
497 | } | |
498 | ||
499 | static int sun_pci_fd_test_drive(unsigned long port, int drive) | |
500 | { | |
501 | unsigned char status, data; | |
502 | int timeout = 1000; | |
503 | int ready; | |
504 | ||
505 | sun_pci_fd_reset(port); | |
506 | ||
507 | data = (0x10 << drive) | 0x0c | drive; | |
508 | sun_pci_fd_out_byte(port, data, DOR); | |
509 | ||
510 | sun_pci_fd_out_byte(port, 0x07, FIFO); | |
511 | sun_pci_fd_out_byte(port, drive & 0x03, FIFO); | |
512 | ||
513 | do { | |
514 | udelay(100); | |
515 | status = sun_pci_fd_sensei(port); | |
516 | } while (((status & 0xc0) == 0x80) && --timeout); | |
517 | ||
518 | if (!timeout) | |
519 | ready = 0; | |
520 | else | |
521 | ready = (status & 0x10) ? 0 : 1; | |
522 | ||
523 | sun_pci_fd_reset(port); | |
524 | return ready; | |
525 | } | |
526 | #undef FIFO | |
527 | #undef MSR | |
528 | #undef DOR | |
529 | ||
3ae627a1 | 530 | static int __init ebus_fdthree_p(struct device_node *dp) |
f5e706ad | 531 | { |
3ae627a1 | 532 | if (!strcmp(dp->name, "fdthree")) |
f5e706ad | 533 | return 1; |
3ae627a1 | 534 | if (!strcmp(dp->name, "floppy")) { |
f5e706ad SR |
535 | const char *compat; |
536 | ||
3ae627a1 | 537 | compat = of_get_property(dp, "compatible", NULL); |
f5e706ad SR |
538 | if (compat && !strcmp(compat, "fdthree")) |
539 | return 1; | |
540 | } | |
541 | return 0; | |
542 | } | |
f5e706ad SR |
543 | |
544 | static unsigned long __init sun_floppy_init(void) | |
545 | { | |
f5e706ad | 546 | static int initialized = 0; |
10a104f9 | 547 | struct device_node *dp; |
94a0cb1f | 548 | struct platform_device *op; |
10a104f9 DM |
549 | const char *prop; |
550 | char state[128]; | |
f5e706ad SR |
551 | |
552 | if (initialized) | |
553 | return sun_floppy_types[0]; | |
554 | initialized = 1; | |
555 | ||
10a104f9 DM |
556 | op = NULL; |
557 | ||
558 | for_each_node_by_name(dp, "SUNW,fdtwo") { | |
559 | if (strcmp(dp->parent->name, "sbus")) | |
560 | continue; | |
561 | op = of_find_device_by_node(dp); | |
562 | if (op) | |
f5e706ad SR |
563 | break; |
564 | } | |
10a104f9 DM |
565 | if (op) { |
566 | floppy_op = op; | |
1636f8ac | 567 | FLOPPY_IRQ = op->archdata.irqs[0]; |
f5e706ad | 568 | } else { |
3ae627a1 | 569 | struct device_node *ebus_dp; |
f5e706ad SR |
570 | void __iomem *auxio_reg; |
571 | const char *state_prop; | |
3ae627a1 | 572 | unsigned long config; |
f5e706ad | 573 | |
3ae627a1 DM |
574 | dp = NULL; |
575 | for_each_node_by_name(ebus_dp, "ebus") { | |
576 | for (dp = ebus_dp->child; dp; dp = dp->sibling) { | |
577 | if (ebus_fdthree_p(dp)) | |
578 | goto found_fdthree; | |
f5e706ad SR |
579 | } |
580 | } | |
3ae627a1 DM |
581 | found_fdthree: |
582 | if (!dp) | |
f5e706ad SR |
583 | return 0; |
584 | ||
3ae627a1 DM |
585 | op = of_find_device_by_node(dp); |
586 | if (!op) | |
587 | return 0; | |
10a104f9 | 588 | |
61c7a080 | 589 | state_prop = of_get_property(op->dev.of_node, "status", NULL); |
f5e706ad SR |
590 | if (state_prop && !strncmp(state_prop, "disabled", 8)) |
591 | return 0; | |
592 | ||
1636f8ac | 593 | FLOPPY_IRQ = op->archdata.irqs[0]; |
f5e706ad SR |
594 | |
595 | /* Make sure the high density bit is set, some systems | |
596 | * (most notably Ultra5/Ultra10) come up with it clear. | |
597 | */ | |
3ae627a1 | 598 | auxio_reg = (void __iomem *) op->resource[2].start; |
f5e706ad SR |
599 | writel(readl(auxio_reg)|0x2, auxio_reg); |
600 | ||
3ae627a1 | 601 | sun_floppy_dev = &op->dev; |
f5e706ad SR |
602 | |
603 | spin_lock_init(&sun_pci_fd_ebus_dma.lock); | |
604 | ||
605 | /* XXX ioremap */ | |
606 | sun_pci_fd_ebus_dma.regs = (void __iomem *) | |
3ae627a1 | 607 | op->resource[1].start; |
f5e706ad SR |
608 | if (!sun_pci_fd_ebus_dma.regs) |
609 | return 0; | |
610 | ||
611 | sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER | | |
612 | EBUS_DMA_FLAG_TCI_DISABLE); | |
613 | sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback; | |
614 | sun_pci_fd_ebus_dma.client_cookie = NULL; | |
615 | sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ; | |
616 | strcpy(sun_pci_fd_ebus_dma.name, "floppy"); | |
617 | if (ebus_dma_register(&sun_pci_fd_ebus_dma)) | |
618 | return 0; | |
619 | ||
620 | /* XXX ioremap */ | |
3ae627a1 | 621 | sun_fdc = (struct sun_flpy_controller *) op->resource[0].start; |
f5e706ad SR |
622 | |
623 | sun_fdops.fd_inb = sun_pci_fd_inb; | |
624 | sun_fdops.fd_outb = sun_pci_fd_outb; | |
625 | ||
626 | can_use_virtual_dma = use_virtual_dma = 0; | |
627 | sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma; | |
628 | sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma; | |
629 | sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode; | |
630 | sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr; | |
631 | sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count; | |
632 | sun_fdops.get_dma_residue = sun_pci_get_dma_residue; | |
633 | ||
634 | sun_fdops.fd_request_irq = sun_pci_fd_request_irq; | |
635 | sun_fdops.fd_free_irq = sun_pci_fd_free_irq; | |
636 | ||
637 | sun_fdops.fd_eject = sun_pci_fd_eject; | |
638 | ||
639 | fdc_status = (unsigned long) &sun_fdc->status_82077; | |
640 | ||
641 | /* | |
642 | * XXX: Find out on which machines this is really needed. | |
643 | */ | |
644 | if (1) { | |
645 | sun_pci_broken_drive = 1; | |
646 | sun_fdops.fd_outb = sun_pci_fd_broken_outb; | |
647 | } | |
648 | ||
649 | allowed_drive_mask = 0; | |
650 | if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0)) | |
651 | sun_floppy_types[0] = 4; | |
652 | if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1)) | |
653 | sun_floppy_types[1] = 4; | |
654 | ||
655 | /* | |
656 | * Find NS87303 SuperIO config registers (through ecpp). | |
657 | */ | |
3ae627a1 DM |
658 | config = 0; |
659 | for (dp = ebus_dp->child; dp; dp = dp->sibling) { | |
660 | if (!strcmp(dp->name, "ecpp")) { | |
94a0cb1f | 661 | struct platform_device *ecpp_op; |
3ae627a1 DM |
662 | |
663 | ecpp_op = of_find_device_by_node(dp); | |
664 | if (ecpp_op) | |
665 | config = ecpp_op->resource[1].start; | |
666 | goto config_done; | |
f5e706ad SR |
667 | } |
668 | } | |
669 | config_done: | |
670 | ||
671 | /* | |
672 | * Sanity check, is this really the NS87303? | |
673 | */ | |
674 | switch (config & 0x3ff) { | |
675 | case 0x02e: | |
676 | case 0x15c: | |
677 | case 0x26e: | |
678 | case 0x398: | |
679 | break; | |
680 | default: | |
681 | config = 0; | |
682 | } | |
683 | ||
684 | if (!config) | |
685 | return sun_floppy_types[0]; | |
686 | ||
687 | /* Enable PC-AT mode. */ | |
688 | ns87303_modify(config, ASC, 0, 0xc0); | |
689 | ||
690 | #ifdef PCI_FDC_SWAP_DRIVES | |
691 | /* | |
692 | * If only Floppy 1 is present, swap drives. | |
693 | */ | |
694 | if (!sun_floppy_types[0] && sun_floppy_types[1]) { | |
695 | /* | |
696 | * Set the drive exchange bit in FCR on NS87303, | |
697 | * make sure other bits are sane before doing so. | |
698 | */ | |
699 | ns87303_modify(config, FER, FER_EDM, 0); | |
700 | ns87303_modify(config, ASC, ASC_DRV2_SEL, 0); | |
701 | ns87303_modify(config, FCR, 0, FCR_LDE); | |
702 | ||
703 | config = sun_floppy_types[0]; | |
704 | sun_floppy_types[0] = sun_floppy_types[1]; | |
705 | sun_floppy_types[1] = config; | |
706 | ||
707 | if (sun_pci_broken_drive != -1) { | |
708 | sun_pci_broken_drive = 1 - sun_pci_broken_drive; | |
709 | sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb; | |
710 | } | |
711 | } | |
712 | #endif /* PCI_FDC_SWAP_DRIVES */ | |
713 | ||
714 | return sun_floppy_types[0]; | |
f5e706ad | 715 | } |
61c7a080 | 716 | prop = of_get_property(op->dev.of_node, "status", NULL); |
10a104f9 | 717 | if (prop && !strncmp(state, "disabled", 8)) |
f5e706ad SR |
718 | return 0; |
719 | ||
720 | /* | |
10a104f9 | 721 | * We cannot do of_ioremap here: it does request_region, |
f5e706ad SR |
722 | * which the generic floppy driver tries to do once again. |
723 | * But we must use the sdev resource values as they have | |
724 | * had parent ranges applied. | |
725 | */ | |
726 | sun_fdc = (struct sun_flpy_controller *) | |
10a104f9 DM |
727 | (op->resource[0].start + |
728 | ((op->resource[0].flags & 0x1ffUL) << 32UL)); | |
f5e706ad SR |
729 | |
730 | /* Last minute sanity check... */ | |
10a104f9 | 731 | if (sbus_readb(&sun_fdc->status1_82077) == 0xff) { |
f5e706ad SR |
732 | sun_fdc = (struct sun_flpy_controller *)-1; |
733 | return 0; | |
734 | } | |
735 | ||
736 | sun_fdops.fd_inb = sun_82077_fd_inb; | |
737 | sun_fdops.fd_outb = sun_82077_fd_outb; | |
738 | ||
739 | can_use_virtual_dma = use_virtual_dma = 1; | |
740 | sun_fdops.fd_enable_dma = sun_fd_enable_dma; | |
741 | sun_fdops.fd_disable_dma = sun_fd_disable_dma; | |
742 | sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode; | |
743 | sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr; | |
744 | sun_fdops.fd_set_dma_count = sun_fd_set_dma_count; | |
745 | sun_fdops.get_dma_residue = sun_get_dma_residue; | |
746 | ||
747 | sun_fdops.fd_request_irq = sun_fd_request_irq; | |
748 | sun_fdops.fd_free_irq = sun_fd_free_irq; | |
749 | ||
750 | sun_fdops.fd_eject = sun_fd_eject; | |
751 | ||
752 | fdc_status = (unsigned long) &sun_fdc->status_82077; | |
753 | ||
754 | /* Success... */ | |
755 | allowed_drive_mask = 0x01; | |
756 | sun_floppy_types[0] = 4; | |
757 | sun_floppy_types[1] = 0; | |
758 | ||
759 | return sun_floppy_types[0]; | |
760 | } | |
761 | ||
762 | #define EXTRA_FLOPPY_PARAMS | |
763 | ||
764 | static DEFINE_SPINLOCK(dma_spin_lock); | |
765 | ||
766 | #define claim_dma_lock() \ | |
767 | ({ unsigned long flags; \ | |
768 | spin_lock_irqsave(&dma_spin_lock, flags); \ | |
769 | flags; \ | |
770 | }) | |
771 | ||
772 | #define release_dma_lock(__flags) \ | |
773 | spin_unlock_irqrestore(&dma_spin_lock, __flags); | |
774 | ||
775 | #endif /* !(__ASM_SPARC64_FLOPPY_H) */ |