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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 | */ | |
30 | struct 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. */ | |
44 | static struct sun_flpy_controller *sun_fdc = (struct sun_flpy_controller *)-1; | |
45 | unsigned long fdc_status; | |
10a104f9 | 46 | static struct of_device *floppy_op = NULL; |
f5e706ad SR |
47 | |
48 | struct 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 | ||
62 | static 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 | ||
83 | static 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 | ||
100 | static 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 | ||
118 | static 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 | */ | |
152 | unsigned char *pdma_vaddr; | |
153 | unsigned long pdma_size; | |
154 | volatile int doing_pdma = 0; | |
155 | ||
156 | /* This is software state */ | |
157 | char *pdma_base = NULL; | |
158 | unsigned long pdma_areasize; | |
159 | ||
160 | /* Common routines to all controller types on the Sparc. */ | |
161 | static 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 | ||
170 | static 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 | ||
185 | static void sun_fd_set_dma_addr(char *buffer) | |
186 | { | |
187 | pdma_vaddr = buffer; | |
188 | } | |
189 | ||
190 | static void sun_fd_set_dma_count(int length) | |
191 | { | |
192 | pdma_size = length; | |
193 | } | |
194 | ||
195 | static 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 | ||
202 | irqreturn_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 | ||
248 | main_interrupt: | |
249 | return floppy_interrupt(irq, dev_cookie); | |
250 | } | |
251 | ||
252 | static 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 | ||
268 | static void sun_fd_free_irq(void) | |
269 | { | |
270 | } | |
271 | ||
272 | static unsigned int sun_get_dma_residue(void) | |
273 | { | |
274 | /* XXX This isn't really correct. XXX */ | |
275 | return 0; | |
276 | } | |
277 | ||
278 | static 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 | ||
aae7fb87 | 287 | #include <asm/ebus_dma.h> |
f5e706ad SR |
288 | #include <asm/ns87303.h> |
289 | ||
290 | static struct ebus_dma_info sun_pci_fd_ebus_dma; | |
3ae627a1 | 291 | static struct device *sun_floppy_dev; |
f5e706ad SR |
292 | static int sun_pci_broken_drive = -1; |
293 | ||
294 | struct sun_pci_dma_op { | |
295 | unsigned int addr; | |
296 | int len; | |
297 | int direction; | |
298 | char *buf; | |
299 | }; | |
300 | static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL}; | |
301 | static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL}; | |
302 | ||
303 | extern irqreturn_t floppy_interrupt(int irq, void *dev_id); | |
304 | ||
305 | static unsigned char sun_pci_fd_inb(unsigned long port) | |
306 | { | |
307 | udelay(5); | |
308 | return inb(port); | |
309 | } | |
310 | ||
311 | static void sun_pci_fd_outb(unsigned char val, unsigned long port) | |
312 | { | |
313 | udelay(5); | |
314 | outb(val, port); | |
315 | } | |
316 | ||
317 | static 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 | |
336 | static 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 | ||
356 | static 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 = | |
3ae627a1 | 372 | dma_map_single(sun_floppy_dev, |
f5e706ad SR |
373 | 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 | ||
385 | static 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) | |
3ae627a1 | 389 | dma_unmap_single(sun_floppy_dev, |
f5e706ad SR |
390 | 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 | ||
396 | static void sun_pci_fd_set_dma_mode(int mode) | |
397 | { | |
398 | if (mode == DMA_MODE_WRITE) | |
3ae627a1 | 399 | sun_pci_dma_pending.direction = DMA_TO_DEVICE; |
f5e706ad | 400 | else |
3ae627a1 | 401 | sun_pci_dma_pending.direction = DMA_FROM_DEVICE; |
f5e706ad SR |
402 | |
403 | ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE); | |
404 | } | |
405 | ||
406 | static void sun_pci_fd_set_dma_count(int length) | |
407 | { | |
408 | sun_pci_dma_pending.len = length; | |
409 | } | |
410 | ||
411 | static void sun_pci_fd_set_dma_addr(char *buffer) | |
412 | { | |
413 | sun_pci_dma_pending.buf = buffer; | |
414 | } | |
415 | ||
416 | static unsigned int sun_pci_get_dma_residue(void) | |
417 | { | |
418 | return ebus_dma_residue(&sun_pci_fd_ebus_dma); | |
419 | } | |
420 | ||
421 | static int sun_pci_fd_request_irq(void) | |
422 | { | |
423 | return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1); | |
424 | } | |
425 | ||
426 | static void sun_pci_fd_free_irq(void) | |
427 | { | |
428 | ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0); | |
429 | } | |
430 | ||
431 | static int sun_pci_fd_eject(int drive) | |
432 | { | |
433 | return -EINVAL; | |
434 | } | |
435 | ||
436 | void 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 | ||
450 | static 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 | ||
461 | static 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 | ||
486 | static 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 | ||
502 | static 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 | ||
3ae627a1 | 533 | static int __init ebus_fdthree_p(struct device_node *dp) |
f5e706ad | 534 | { |
3ae627a1 | 535 | if (!strcmp(dp->name, "fdthree")) |
f5e706ad | 536 | return 1; |
3ae627a1 | 537 | if (!strcmp(dp->name, "floppy")) { |
f5e706ad SR |
538 | const char *compat; |
539 | ||
3ae627a1 | 540 | compat = of_get_property(dp, "compatible", NULL); |
f5e706ad SR |
541 | if (compat && !strcmp(compat, "fdthree")) |
542 | return 1; | |
543 | } | |
544 | return 0; | |
545 | } | |
f5e706ad SR |
546 | |
547 | static unsigned long __init sun_floppy_init(void) | |
548 | { | |
f5e706ad | 549 | static int initialized = 0; |
10a104f9 DM |
550 | struct device_node *dp; |
551 | struct of_device *op; | |
552 | const char *prop; | |
553 | char state[128]; | |
f5e706ad SR |
554 | |
555 | if (initialized) | |
556 | return sun_floppy_types[0]; | |
557 | initialized = 1; | |
558 | ||
10a104f9 DM |
559 | 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) | |
f5e706ad SR |
566 | break; |
567 | } | |
10a104f9 DM |
568 | if (op) { |
569 | floppy_op = op; | |
570 | FLOPPY_IRQ = op->irqs[0]; | |
f5e706ad | 571 | } else { |
3ae627a1 | 572 | struct device_node *ebus_dp; |
f5e706ad SR |
573 | void __iomem *auxio_reg; |
574 | const char *state_prop; | |
3ae627a1 | 575 | unsigned long config; |
f5e706ad | 576 | |
3ae627a1 DM |
577 | 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; | |
f5e706ad SR |
582 | } |
583 | } | |
3ae627a1 DM |
584 | found_fdthree: |
585 | if (!dp) | |
f5e706ad SR |
586 | return 0; |
587 | ||
3ae627a1 DM |
588 | op = of_find_device_by_node(dp); |
589 | if (!op) | |
590 | return 0; | |
10a104f9 | 591 | |
61c7a080 | 592 | state_prop = of_get_property(op->dev.of_node, "status", NULL); |
f5e706ad SR |
593 | if (state_prop && !strncmp(state_prop, "disabled", 8)) |
594 | return 0; | |
595 | ||
3ae627a1 | 596 | FLOPPY_IRQ = op->irqs[0]; |
f5e706ad SR |
597 | |
598 | /* Make sure the high density bit is set, some systems | |
599 | * (most notably Ultra5/Ultra10) come up with it clear. | |
600 | */ | |
3ae627a1 | 601 | auxio_reg = (void __iomem *) op->resource[2].start; |
f5e706ad SR |
602 | writel(readl(auxio_reg)|0x2, auxio_reg); |
603 | ||
3ae627a1 | 604 | sun_floppy_dev = &op->dev; |
f5e706ad SR |
605 | |
606 | spin_lock_init(&sun_pci_fd_ebus_dma.lock); | |
607 | ||
608 | /* XXX ioremap */ | |
609 | sun_pci_fd_ebus_dma.regs = (void __iomem *) | |
3ae627a1 | 610 | op->resource[1].start; |
f5e706ad SR |
611 | 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 */ | |
3ae627a1 | 624 | sun_fdc = (struct sun_flpy_controller *) op->resource[0].start; |
f5e706ad SR |
625 | |
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 | */ | |
3ae627a1 DM |
661 | 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; | |
f5e706ad SR |
670 | } |
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]; | |
f5e706ad | 718 | } |
61c7a080 | 719 | prop = of_get_property(op->dev.of_node, "status", NULL); |
10a104f9 | 720 | if (prop && !strncmp(state, "disabled", 8)) |
f5e706ad SR |
721 | return 0; |
722 | ||
723 | /* | |
10a104f9 | 724 | * We cannot do of_ioremap here: it does request_region, |
f5e706ad SR |
725 | * 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 *) | |
10a104f9 DM |
730 | (op->resource[0].start + |
731 | ((op->resource[0].flags & 0x1ffUL) << 32UL)); | |
f5e706ad SR |
732 | |
733 | /* Last minute sanity check... */ | |
10a104f9 | 734 | if (sbus_readb(&sun_fdc->status1_82077) == 0xff) { |
f5e706ad SR |
735 | 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 | ||
767 | static 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) */ |