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1da177e4 LT |
1 | /* $Id: floppy.h,v 1.32 2001/10/26 17:59:36 davem Exp $ |
2 | * asm-sparc64/floppy.h: Sparc specific parts of the Floppy driver. | |
3 | * | |
4 | * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) | |
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 | ||
1da177e4 LT |
13 | #include <linux/init.h> |
14 | ||
15 | #include <asm/page.h> | |
16 | #include <asm/pgtable.h> | |
17 | #include <asm/system.h> | |
18 | #include <asm/idprom.h> | |
19 | #include <asm/oplib.h> | |
20 | #include <asm/auxio.h> | |
21 | #include <asm/sbus.h> | |
22 | #include <asm/irq.h> | |
23 | ||
24 | ||
25 | /* | |
26 | * Define this to enable exchanging drive 0 and 1 if only drive 1 is | |
27 | * probed on PCI machines. | |
28 | */ | |
29 | #undef PCI_FDC_SWAP_DRIVES | |
30 | ||
31 | ||
32 | /* References: | |
33 | * 1) Netbsd Sun floppy driver. | |
34 | * 2) NCR 82077 controller manual | |
35 | * 3) Intel 82077 controller manual | |
36 | */ | |
37 | struct sun_flpy_controller { | |
38 | volatile unsigned char status1_82077; /* Auxiliary Status reg. 1 */ | |
39 | volatile unsigned char status2_82077; /* Auxiliary Status reg. 2 */ | |
40 | volatile unsigned char dor_82077; /* Digital Output reg. */ | |
41 | volatile unsigned char tapectl_82077; /* Tape Control reg */ | |
42 | volatile unsigned char status_82077; /* Main Status Register. */ | |
43 | #define drs_82077 status_82077 /* Digital Rate Select reg. */ | |
44 | volatile unsigned char data_82077; /* Data fifo. */ | |
45 | volatile unsigned char ___unused; | |
46 | volatile unsigned char dir_82077; /* Digital Input reg. */ | |
47 | #define dcr_82077 dir_82077 /* Config Control reg. */ | |
48 | }; | |
49 | ||
50 | /* You'll only ever find one controller on an Ultra anyways. */ | |
51 | static struct sun_flpy_controller *sun_fdc = (struct sun_flpy_controller *)-1; | |
52 | unsigned long fdc_status; | |
53 | static struct sbus_dev *floppy_sdev = NULL; | |
54 | ||
55 | struct sun_floppy_ops { | |
56 | unsigned char (*fd_inb) (unsigned long port); | |
57 | void (*fd_outb) (unsigned char value, unsigned long port); | |
58 | void (*fd_enable_dma) (void); | |
59 | void (*fd_disable_dma) (void); | |
60 | void (*fd_set_dma_mode) (int); | |
61 | void (*fd_set_dma_addr) (char *); | |
62 | void (*fd_set_dma_count) (int); | |
63 | unsigned int (*get_dma_residue) (void); | |
64 | int (*fd_request_irq) (void); | |
65 | void (*fd_free_irq) (void); | |
66 | int (*fd_eject) (int); | |
67 | }; | |
68 | ||
69 | static struct sun_floppy_ops sun_fdops; | |
70 | ||
71 | #define fd_inb(port) sun_fdops.fd_inb(port) | |
72 | #define fd_outb(value,port) sun_fdops.fd_outb(value,port) | |
73 | #define fd_enable_dma() sun_fdops.fd_enable_dma() | |
74 | #define fd_disable_dma() sun_fdops.fd_disable_dma() | |
75 | #define fd_request_dma() (0) /* nothing... */ | |
76 | #define fd_free_dma() /* nothing... */ | |
77 | #define fd_clear_dma_ff() /* nothing... */ | |
78 | #define fd_set_dma_mode(mode) sun_fdops.fd_set_dma_mode(mode) | |
79 | #define fd_set_dma_addr(addr) sun_fdops.fd_set_dma_addr(addr) | |
80 | #define fd_set_dma_count(count) sun_fdops.fd_set_dma_count(count) | |
81 | #define get_dma_residue(x) sun_fdops.get_dma_residue() | |
82 | #define fd_cacheflush(addr, size) /* nothing... */ | |
83 | #define fd_request_irq() sun_fdops.fd_request_irq() | |
84 | #define fd_free_irq() sun_fdops.fd_free_irq() | |
85 | #define fd_eject(drive) sun_fdops.fd_eject(drive) | |
86 | ||
87 | static int FLOPPY_MOTOR_MASK = 0x10; | |
88 | ||
89 | /* Super paranoid... */ | |
90 | #undef HAVE_DISABLE_HLT | |
91 | ||
92 | static int sun_floppy_types[2] = { 0, 0 }; | |
93 | ||
94 | /* Here is where we catch the floppy driver trying to initialize, | |
95 | * therefore this is where we call the PROM device tree probing | |
96 | * routine etc. on the Sparc. | |
97 | */ | |
98 | #define FLOPPY0_TYPE sun_floppy_init() | |
99 | #define FLOPPY1_TYPE sun_floppy_types[1] | |
100 | ||
101 | #define FDC1 ((unsigned long)sun_fdc) | |
102 | ||
103 | #define N_FDC 1 | |
104 | #define N_DRIVE 8 | |
105 | ||
106 | /* No 64k boundary crossing problems on the Sparc. */ | |
107 | #define CROSS_64KB(a,s) (0) | |
108 | ||
109 | static unsigned char sun_82077_fd_inb(unsigned long port) | |
110 | { | |
111 | udelay(5); | |
112 | switch(port & 7) { | |
113 | default: | |
114 | printk("floppy: Asked to read unknown port %lx\n", port); | |
115 | panic("floppy: Port bolixed."); | |
116 | case 4: /* FD_STATUS */ | |
117 | return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA; | |
118 | case 5: /* FD_DATA */ | |
119 | return sbus_readb(&sun_fdc->data_82077); | |
120 | case 7: /* FD_DIR */ | |
121 | /* XXX: Is DCL on 0x80 in sun4m? */ | |
122 | return sbus_readb(&sun_fdc->dir_82077); | |
123 | }; | |
124 | panic("sun_82072_fd_inb: How did I get here?"); | |
125 | } | |
126 | ||
127 | static void sun_82077_fd_outb(unsigned char value, unsigned long port) | |
128 | { | |
129 | udelay(5); | |
130 | switch(port & 7) { | |
131 | default: | |
132 | printk("floppy: Asked to write to unknown port %lx\n", port); | |
133 | panic("floppy: Port bolixed."); | |
134 | case 2: /* FD_DOR */ | |
135 | /* Happily, the 82077 has a real DOR register. */ | |
136 | sbus_writeb(value, &sun_fdc->dor_82077); | |
137 | break; | |
138 | case 5: /* FD_DATA */ | |
139 | sbus_writeb(value, &sun_fdc->data_82077); | |
140 | break; | |
141 | case 7: /* FD_DCR */ | |
142 | sbus_writeb(value, &sun_fdc->dcr_82077); | |
143 | break; | |
144 | case 4: /* FD_STATUS */ | |
145 | sbus_writeb(value, &sun_fdc->status_82077); | |
146 | break; | |
147 | }; | |
148 | return; | |
149 | } | |
150 | ||
151 | /* For pseudo-dma (Sun floppy drives have no real DMA available to | |
152 | * them so we must eat the data fifo bytes directly ourselves) we have | |
153 | * three state variables. doing_pdma tells our inline low-level | |
154 | * assembly floppy interrupt entry point whether it should sit and eat | |
155 | * bytes from the fifo or just transfer control up to the higher level | |
156 | * floppy interrupt c-code. I tried very hard but I could not get the | |
157 | * pseudo-dma to work in c-code without getting many overruns and | |
158 | * underruns. If non-zero, doing_pdma encodes the direction of | |
159 | * the transfer for debugging. 1=read 2=write | |
160 | */ | |
63b61452 | 161 | unsigned char *pdma_vaddr; |
1da177e4 LT |
162 | unsigned long pdma_size; |
163 | volatile int doing_pdma = 0; | |
164 | ||
165 | /* This is software state */ | |
166 | char *pdma_base = NULL; | |
167 | unsigned long pdma_areasize; | |
168 | ||
169 | /* Common routines to all controller types on the Sparc. */ | |
170 | static void sun_fd_disable_dma(void) | |
171 | { | |
172 | doing_pdma = 0; | |
173 | if (pdma_base) { | |
174 | mmu_unlockarea(pdma_base, pdma_areasize); | |
175 | pdma_base = NULL; | |
176 | } | |
177 | } | |
178 | ||
179 | static void sun_fd_set_dma_mode(int mode) | |
180 | { | |
181 | switch(mode) { | |
182 | case DMA_MODE_READ: | |
183 | doing_pdma = 1; | |
184 | break; | |
185 | case DMA_MODE_WRITE: | |
186 | doing_pdma = 2; | |
187 | break; | |
188 | default: | |
189 | printk("Unknown dma mode %d\n", mode); | |
190 | panic("floppy: Giving up..."); | |
191 | } | |
192 | } | |
193 | ||
194 | static void sun_fd_set_dma_addr(char *buffer) | |
195 | { | |
196 | pdma_vaddr = buffer; | |
197 | } | |
198 | ||
199 | static void sun_fd_set_dma_count(int length) | |
200 | { | |
201 | pdma_size = length; | |
202 | } | |
203 | ||
204 | static void sun_fd_enable_dma(void) | |
205 | { | |
206 | pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size); | |
207 | pdma_base = pdma_vaddr; | |
208 | pdma_areasize = pdma_size; | |
209 | } | |
210 | ||
6d24c8dc | 211 | irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie) |
35055996 DM |
212 | { |
213 | if (likely(doing_pdma)) { | |
214 | void __iomem *stat = (void __iomem *) fdc_status; | |
215 | unsigned char *vaddr = pdma_vaddr; | |
216 | unsigned long size = pdma_size; | |
217 | u8 val; | |
218 | ||
219 | while (size) { | |
220 | val = readb(stat); | |
221 | if (unlikely(!(val & 0x80))) { | |
222 | pdma_vaddr = vaddr; | |
223 | pdma_size = size; | |
224 | return IRQ_HANDLED; | |
225 | } | |
226 | if (unlikely(!(val & 0x20))) { | |
227 | pdma_vaddr = vaddr; | |
228 | pdma_size = size; | |
229 | doing_pdma = 0; | |
230 | goto main_interrupt; | |
231 | } | |
232 | if (val & 0x40) { | |
233 | /* read */ | |
234 | *vaddr++ = readb(stat + 1); | |
235 | } else { | |
236 | unsigned char data = *vaddr++; | |
237 | ||
238 | /* write */ | |
239 | writeb(data, stat + 1); | |
240 | } | |
241 | size--; | |
242 | } | |
243 | ||
244 | pdma_vaddr = vaddr; | |
245 | pdma_size = size; | |
246 | ||
247 | /* Send Terminal Count pulse to floppy controller. */ | |
248 | val = readb(auxio_register); | |
249 | val |= AUXIO_AUX1_FTCNT; | |
250 | writeb(val, auxio_register); | |
251 | val &= ~AUXIO_AUX1_FTCNT; | |
252 | writeb(val, auxio_register); | |
253 | ||
254 | doing_pdma = 0; | |
255 | } | |
256 | ||
257 | main_interrupt: | |
6d24c8dc | 258 | return floppy_interrupt(irq, dev_cookie); |
35055996 | 259 | } |
1da177e4 LT |
260 | |
261 | static int sun_fd_request_irq(void) | |
262 | { | |
263 | static int once = 0; | |
264 | int error; | |
265 | ||
266 | if(!once) { | |
267 | once = 1; | |
268 | ||
63b61452 | 269 | error = request_irq(FLOPPY_IRQ, sparc_floppy_irq, |
d356d7f4 | 270 | IRQF_DISABLED, "floppy", NULL); |
1da177e4 LT |
271 | |
272 | return ((error == 0) ? 0 : -1); | |
273 | } | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static void sun_fd_free_irq(void) | |
278 | { | |
279 | } | |
280 | ||
281 | static unsigned int sun_get_dma_residue(void) | |
282 | { | |
283 | /* XXX This isn't really correct. XXX */ | |
284 | return 0; | |
285 | } | |
286 | ||
287 | static int sun_fd_eject(int drive) | |
288 | { | |
289 | set_dor(0x00, 0xff, 0x90); | |
290 | udelay(500); | |
291 | set_dor(0x00, 0x6f, 0x00); | |
292 | udelay(500); | |
293 | return 0; | |
294 | } | |
295 | ||
296 | #ifdef CONFIG_PCI | |
297 | #include <asm/ebus.h> | |
298 | #include <asm/isa.h> | |
299 | #include <asm/ns87303.h> | |
300 | ||
301 | static struct ebus_dma_info sun_pci_fd_ebus_dma; | |
302 | static struct pci_dev *sun_pci_ebus_dev; | |
303 | static int sun_pci_broken_drive = -1; | |
304 | ||
305 | struct sun_pci_dma_op { | |
306 | unsigned int addr; | |
307 | int len; | |
308 | int direction; | |
309 | char *buf; | |
310 | }; | |
311 | static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL}; | |
312 | static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL}; | |
313 | ||
6d24c8dc | 314 | extern irqreturn_t floppy_interrupt(int irq, void *dev_id); |
1da177e4 LT |
315 | |
316 | static unsigned char sun_pci_fd_inb(unsigned long port) | |
317 | { | |
318 | udelay(5); | |
319 | return inb(port); | |
320 | } | |
321 | ||
322 | static void sun_pci_fd_outb(unsigned char val, unsigned long port) | |
323 | { | |
324 | udelay(5); | |
325 | outb(val, port); | |
326 | } | |
327 | ||
328 | static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port) | |
329 | { | |
330 | udelay(5); | |
331 | /* | |
332 | * XXX: Due to SUN's broken floppy connector on AX and AXi | |
333 | * we need to turn on MOTOR_0 also, if the floppy is | |
334 | * jumpered to DS1 (like most PC floppies are). I hope | |
335 | * this does not hurt correct hardware like the AXmp. | |
336 | * (Eddie, Sep 12 1998). | |
337 | */ | |
338 | if (port == ((unsigned long)sun_fdc) + 2) { | |
339 | if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) { | |
340 | val |= 0x10; | |
341 | } | |
342 | } | |
343 | outb(val, port); | |
344 | } | |
345 | ||
346 | #ifdef PCI_FDC_SWAP_DRIVES | |
347 | static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port) | |
348 | { | |
349 | udelay(5); | |
350 | /* | |
351 | * XXX: Due to SUN's broken floppy connector on AX and AXi | |
352 | * we need to turn on MOTOR_0 also, if the floppy is | |
353 | * jumpered to DS1 (like most PC floppies are). I hope | |
354 | * this does not hurt correct hardware like the AXmp. | |
355 | * (Eddie, Sep 12 1998). | |
356 | */ | |
357 | if (port == ((unsigned long)sun_fdc) + 2) { | |
358 | if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) { | |
359 | val &= ~(0x03); | |
360 | val |= 0x21; | |
361 | } | |
362 | } | |
363 | outb(val, port); | |
364 | } | |
365 | #endif /* PCI_FDC_SWAP_DRIVES */ | |
366 | ||
367 | static void sun_pci_fd_enable_dma(void) | |
368 | { | |
369 | BUG_ON((NULL == sun_pci_dma_pending.buf) || | |
370 | (0 == sun_pci_dma_pending.len) || | |
371 | (0 == sun_pci_dma_pending.direction)); | |
372 | ||
373 | sun_pci_dma_current.buf = sun_pci_dma_pending.buf; | |
374 | sun_pci_dma_current.len = sun_pci_dma_pending.len; | |
375 | sun_pci_dma_current.direction = sun_pci_dma_pending.direction; | |
376 | ||
377 | sun_pci_dma_pending.buf = NULL; | |
378 | sun_pci_dma_pending.len = 0; | |
379 | sun_pci_dma_pending.direction = 0; | |
380 | sun_pci_dma_pending.addr = -1U; | |
381 | ||
382 | sun_pci_dma_current.addr = | |
383 | pci_map_single(sun_pci_ebus_dev, | |
384 | sun_pci_dma_current.buf, | |
385 | sun_pci_dma_current.len, | |
386 | sun_pci_dma_current.direction); | |
387 | ||
388 | ebus_dma_enable(&sun_pci_fd_ebus_dma, 1); | |
389 | ||
390 | if (ebus_dma_request(&sun_pci_fd_ebus_dma, | |
391 | sun_pci_dma_current.addr, | |
392 | sun_pci_dma_current.len)) | |
393 | BUG(); | |
394 | } | |
395 | ||
396 | static void sun_pci_fd_disable_dma(void) | |
397 | { | |
398 | ebus_dma_enable(&sun_pci_fd_ebus_dma, 0); | |
399 | if (sun_pci_dma_current.addr != -1U) | |
400 | pci_unmap_single(sun_pci_ebus_dev, | |
401 | sun_pci_dma_current.addr, | |
402 | sun_pci_dma_current.len, | |
403 | sun_pci_dma_current.direction); | |
404 | sun_pci_dma_current.addr = -1U; | |
405 | } | |
406 | ||
407 | static void sun_pci_fd_set_dma_mode(int mode) | |
408 | { | |
409 | if (mode == DMA_MODE_WRITE) | |
410 | sun_pci_dma_pending.direction = PCI_DMA_TODEVICE; | |
411 | else | |
412 | sun_pci_dma_pending.direction = PCI_DMA_FROMDEVICE; | |
413 | ||
414 | ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE); | |
415 | } | |
416 | ||
417 | static void sun_pci_fd_set_dma_count(int length) | |
418 | { | |
419 | sun_pci_dma_pending.len = length; | |
420 | } | |
421 | ||
422 | static void sun_pci_fd_set_dma_addr(char *buffer) | |
423 | { | |
424 | sun_pci_dma_pending.buf = buffer; | |
425 | } | |
426 | ||
427 | static unsigned int sun_pci_get_dma_residue(void) | |
428 | { | |
429 | return ebus_dma_residue(&sun_pci_fd_ebus_dma); | |
430 | } | |
431 | ||
432 | static int sun_pci_fd_request_irq(void) | |
433 | { | |
434 | return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1); | |
435 | } | |
436 | ||
437 | static void sun_pci_fd_free_irq(void) | |
438 | { | |
439 | ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0); | |
440 | } | |
441 | ||
442 | static int sun_pci_fd_eject(int drive) | |
443 | { | |
444 | return -EINVAL; | |
445 | } | |
446 | ||
447 | void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie) | |
448 | { | |
6d24c8dc | 449 | floppy_interrupt(0, NULL); |
1da177e4 LT |
450 | } |
451 | ||
452 | /* | |
453 | * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI, | |
454 | * even if this is configured using DS1, thus looks like /dev/fd1 with | |
455 | * the cabling used in Ultras. | |
456 | */ | |
457 | #define DOR (port + 2) | |
458 | #define MSR (port + 4) | |
459 | #define FIFO (port + 5) | |
460 | ||
461 | static void sun_pci_fd_out_byte(unsigned long port, unsigned char val, | |
462 | unsigned long reg) | |
463 | { | |
464 | unsigned char status; | |
465 | int timeout = 1000; | |
466 | ||
467 | while (!((status = inb(MSR)) & 0x80) && --timeout) | |
468 | udelay(100); | |
469 | outb(val, reg); | |
470 | } | |
471 | ||
472 | static unsigned char sun_pci_fd_sensei(unsigned long port) | |
473 | { | |
474 | unsigned char result[2] = { 0x70, 0x00 }; | |
475 | unsigned char status; | |
476 | int i = 0; | |
477 | ||
478 | sun_pci_fd_out_byte(port, 0x08, FIFO); | |
479 | do { | |
480 | int timeout = 1000; | |
481 | ||
482 | while (!((status = inb(MSR)) & 0x80) && --timeout) | |
483 | udelay(100); | |
484 | ||
485 | if (!timeout) | |
486 | break; | |
487 | ||
488 | if ((status & 0xf0) == 0xd0) | |
489 | result[i++] = inb(FIFO); | |
490 | else | |
491 | break; | |
492 | } while (i < 2); | |
493 | ||
494 | return result[0]; | |
495 | } | |
496 | ||
497 | static void sun_pci_fd_reset(unsigned long port) | |
498 | { | |
499 | unsigned char mask = 0x00; | |
500 | unsigned char status; | |
501 | int timeout = 10000; | |
502 | ||
503 | outb(0x80, MSR); | |
504 | do { | |
505 | status = sun_pci_fd_sensei(port); | |
506 | if ((status & 0xc0) == 0xc0) | |
507 | mask |= 1 << (status & 0x03); | |
508 | else | |
509 | udelay(100); | |
510 | } while ((mask != 0x0f) && --timeout); | |
511 | } | |
512 | ||
513 | static int sun_pci_fd_test_drive(unsigned long port, int drive) | |
514 | { | |
515 | unsigned char status, data; | |
516 | int timeout = 1000; | |
517 | int ready; | |
518 | ||
519 | sun_pci_fd_reset(port); | |
520 | ||
521 | data = (0x10 << drive) | 0x0c | drive; | |
522 | sun_pci_fd_out_byte(port, data, DOR); | |
523 | ||
524 | sun_pci_fd_out_byte(port, 0x07, FIFO); | |
525 | sun_pci_fd_out_byte(port, drive & 0x03, FIFO); | |
526 | ||
527 | do { | |
528 | udelay(100); | |
529 | status = sun_pci_fd_sensei(port); | |
530 | } while (((status & 0xc0) == 0x80) && --timeout); | |
531 | ||
532 | if (!timeout) | |
533 | ready = 0; | |
534 | else | |
535 | ready = (status & 0x10) ? 0 : 1; | |
536 | ||
537 | sun_pci_fd_reset(port); | |
538 | return ready; | |
539 | } | |
540 | #undef FIFO | |
541 | #undef MSR | |
542 | #undef DOR | |
543 | ||
544 | #endif /* CONFIG_PCI */ | |
545 | ||
546 | #ifdef CONFIG_PCI | |
547 | static int __init ebus_fdthree_p(struct linux_ebus_device *edev) | |
548 | { | |
690c8fd3 | 549 | if (!strcmp(edev->prom_node->name, "fdthree")) |
1da177e4 | 550 | return 1; |
690c8fd3 DM |
551 | if (!strcmp(edev->prom_node->name, "floppy")) { |
552 | char *compat; | |
553 | ||
554 | compat = of_get_property(edev->prom_node, | |
555 | "compatible", NULL); | |
556 | if (compat && !strcmp(compat, "fdthree")) | |
1da177e4 LT |
557 | return 1; |
558 | } | |
559 | return 0; | |
560 | } | |
561 | #endif | |
562 | ||
563 | #ifdef CONFIG_PCI | |
564 | #undef ISA_FLOPPY_WORKS | |
565 | ||
566 | #ifdef ISA_FLOPPY_WORKS | |
567 | static unsigned long __init isa_floppy_init(void) | |
568 | { | |
569 | struct sparc_isa_bridge *isa_br; | |
570 | struct sparc_isa_device *isa_dev = NULL; | |
571 | ||
572 | for_each_isa(isa_br) { | |
573 | for_each_isadev(isa_dev, isa_br) { | |
690c8fd3 | 574 | if (!strcmp(isa_dev->prom_node->name, "dma")) { |
1da177e4 LT |
575 | struct sparc_isa_device *child = |
576 | isa_dev->child; | |
577 | ||
578 | while (child) { | |
690c8fd3 | 579 | if (!strcmp(child->prom_node->name, |
1da177e4 LT |
580 | "floppy")) { |
581 | isa_dev = child; | |
582 | goto isa_done; | |
583 | } | |
584 | child = child->next; | |
585 | } | |
586 | } | |
587 | } | |
588 | } | |
589 | isa_done: | |
590 | if (!isa_dev) | |
591 | return 0; | |
592 | ||
593 | /* We could use DMA on devices behind the ISA bridge, but... | |
594 | * | |
595 | * There is a slight problem. Normally on x86 kit the x86 processor | |
596 | * delays I/O port instructions when the ISA bus "dma in progress" | |
597 | * signal is active. Well, sparc64 systems do not monitor this | |
598 | * signal thus we would need to block all I/O port accesses in software | |
599 | * when a dma transfer is active for some device. | |
600 | */ | |
601 | ||
602 | sun_fdc = (struct sun_flpy_controller *)isa_dev->resource.start; | |
603 | FLOPPY_IRQ = isa_dev->irq; | |
604 | ||
605 | sun_fdops.fd_inb = sun_pci_fd_inb; | |
606 | sun_fdops.fd_outb = sun_pci_fd_outb; | |
607 | ||
608 | can_use_virtual_dma = use_virtual_dma = 1; | |
609 | sun_fdops.fd_enable_dma = sun_fd_enable_dma; | |
610 | sun_fdops.fd_disable_dma = sun_fd_disable_dma; | |
611 | sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode; | |
612 | sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr; | |
613 | sun_fdops.fd_set_dma_count = sun_fd_set_dma_count; | |
614 | sun_fdops.get_dma_residue = sun_get_dma_residue; | |
615 | ||
616 | sun_fdops.fd_request_irq = sun_fd_request_irq; | |
617 | sun_fdops.fd_free_irq = sun_fd_free_irq; | |
618 | ||
619 | /* Floppy eject is manual. Actually, could determine this | |
620 | * via presence of 'manual' property in OBP node. | |
621 | */ | |
622 | sun_fdops.fd_eject = sun_pci_fd_eject; | |
623 | ||
624 | fdc_status = (unsigned long) &sun_fdc->status_82077; | |
625 | FLOPPY_MOTOR_MASK = 0xf0; | |
626 | ||
627 | allowed_drive_mask = 0; | |
628 | sun_floppy_types[0] = 0; | |
629 | sun_floppy_types[1] = 4; | |
630 | ||
631 | sun_pci_broken_drive = 1; | |
632 | sun_fdops.fd_outb = sun_pci_fd_broken_outb; | |
633 | ||
634 | return sun_floppy_types[0]; | |
635 | } | |
636 | #endif /* ISA_FLOPPY_WORKS */ | |
637 | ||
638 | #endif | |
639 | ||
640 | static unsigned long __init sun_floppy_init(void) | |
641 | { | |
642 | char state[128]; | |
643 | struct sbus_bus *bus; | |
644 | struct sbus_dev *sdev = NULL; | |
645 | static int initialized = 0; | |
646 | ||
647 | if (initialized) | |
648 | return sun_floppy_types[0]; | |
649 | initialized = 1; | |
650 | ||
651 | for_all_sbusdev (sdev, bus) { | |
652 | if (!strcmp(sdev->prom_name, "SUNW,fdtwo")) | |
653 | break; | |
654 | } | |
655 | if(sdev) { | |
656 | floppy_sdev = sdev; | |
657 | FLOPPY_IRQ = sdev->irqs[0]; | |
658 | } else { | |
659 | #ifdef CONFIG_PCI | |
660 | struct linux_ebus *ebus; | |
661 | struct linux_ebus_device *edev = NULL; | |
662 | unsigned long config = 0; | |
63b61452 | 663 | void __iomem *auxio_reg; |
690c8fd3 | 664 | char *state_prop; |
1da177e4 LT |
665 | |
666 | for_each_ebus(ebus) { | |
667 | for_each_ebusdev(edev, ebus) { | |
668 | if (ebus_fdthree_p(edev)) | |
669 | goto ebus_done; | |
670 | } | |
671 | } | |
672 | ebus_done: | |
673 | if (!edev) { | |
674 | #ifdef ISA_FLOPPY_WORKS | |
675 | return isa_floppy_init(); | |
676 | #else | |
677 | return 0; | |
678 | #endif | |
679 | } | |
680 | ||
690c8fd3 DM |
681 | state_prop = of_get_property(edev->prom_node, "status", NULL); |
682 | if (state_prop && !strncmp(state_prop, "disabled", 8)) | |
1da177e4 LT |
683 | return 0; |
684 | ||
685 | FLOPPY_IRQ = edev->irqs[0]; | |
686 | ||
687 | /* Make sure the high density bit is set, some systems | |
688 | * (most notably Ultra5/Ultra10) come up with it clear. | |
689 | */ | |
63b61452 | 690 | auxio_reg = (void __iomem *) edev->resource[2].start; |
1da177e4 LT |
691 | writel(readl(auxio_reg)|0x2, auxio_reg); |
692 | ||
693 | sun_pci_ebus_dev = ebus->self; | |
694 | ||
695 | spin_lock_init(&sun_pci_fd_ebus_dma.lock); | |
696 | ||
697 | /* XXX ioremap */ | |
63b61452 DM |
698 | sun_pci_fd_ebus_dma.regs = (void __iomem *) |
699 | edev->resource[1].start; | |
1da177e4 LT |
700 | if (!sun_pci_fd_ebus_dma.regs) |
701 | return 0; | |
702 | ||
703 | sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER | | |
704 | EBUS_DMA_FLAG_TCI_DISABLE); | |
705 | sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback; | |
706 | sun_pci_fd_ebus_dma.client_cookie = NULL; | |
707 | sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ; | |
708 | strcpy(sun_pci_fd_ebus_dma.name, "floppy"); | |
709 | if (ebus_dma_register(&sun_pci_fd_ebus_dma)) | |
710 | return 0; | |
711 | ||
712 | /* XXX ioremap */ | |
713 | sun_fdc = (struct sun_flpy_controller *)edev->resource[0].start; | |
714 | ||
715 | sun_fdops.fd_inb = sun_pci_fd_inb; | |
716 | sun_fdops.fd_outb = sun_pci_fd_outb; | |
717 | ||
718 | can_use_virtual_dma = use_virtual_dma = 0; | |
719 | sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma; | |
720 | sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma; | |
721 | sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode; | |
722 | sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr; | |
723 | sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count; | |
724 | sun_fdops.get_dma_residue = sun_pci_get_dma_residue; | |
725 | ||
726 | sun_fdops.fd_request_irq = sun_pci_fd_request_irq; | |
727 | sun_fdops.fd_free_irq = sun_pci_fd_free_irq; | |
728 | ||
729 | sun_fdops.fd_eject = sun_pci_fd_eject; | |
730 | ||
731 | fdc_status = (unsigned long) &sun_fdc->status_82077; | |
732 | FLOPPY_MOTOR_MASK = 0xf0; | |
733 | ||
734 | /* | |
735 | * XXX: Find out on which machines this is really needed. | |
736 | */ | |
737 | if (1) { | |
738 | sun_pci_broken_drive = 1; | |
739 | sun_fdops.fd_outb = sun_pci_fd_broken_outb; | |
740 | } | |
741 | ||
742 | allowed_drive_mask = 0; | |
743 | if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0)) | |
744 | sun_floppy_types[0] = 4; | |
745 | if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1)) | |
746 | sun_floppy_types[1] = 4; | |
747 | ||
748 | /* | |
749 | * Find NS87303 SuperIO config registers (through ecpp). | |
750 | */ | |
751 | for_each_ebus(ebus) { | |
752 | for_each_ebusdev(edev, ebus) { | |
690c8fd3 | 753 | if (!strcmp(edev->prom_node->name, "ecpp")) { |
1da177e4 LT |
754 | config = edev->resource[1].start; |
755 | goto config_done; | |
756 | } | |
757 | } | |
758 | } | |
759 | config_done: | |
760 | ||
761 | /* | |
762 | * Sanity check, is this really the NS87303? | |
763 | */ | |
764 | switch (config & 0x3ff) { | |
765 | case 0x02e: | |
766 | case 0x15c: | |
767 | case 0x26e: | |
768 | case 0x398: | |
769 | break; | |
770 | default: | |
771 | config = 0; | |
772 | } | |
773 | ||
774 | if (!config) | |
775 | return sun_floppy_types[0]; | |
776 | ||
777 | /* Enable PC-AT mode. */ | |
778 | ns87303_modify(config, ASC, 0, 0xc0); | |
779 | ||
780 | #ifdef PCI_FDC_SWAP_DRIVES | |
781 | /* | |
782 | * If only Floppy 1 is present, swap drives. | |
783 | */ | |
784 | if (!sun_floppy_types[0] && sun_floppy_types[1]) { | |
785 | /* | |
786 | * Set the drive exchange bit in FCR on NS87303, | |
7f927fcc | 787 | * make sure other bits are sane before doing so. |
1da177e4 LT |
788 | */ |
789 | ns87303_modify(config, FER, FER_EDM, 0); | |
790 | ns87303_modify(config, ASC, ASC_DRV2_SEL, 0); | |
791 | ns87303_modify(config, FCR, 0, FCR_LDE); | |
792 | ||
793 | config = sun_floppy_types[0]; | |
794 | sun_floppy_types[0] = sun_floppy_types[1]; | |
795 | sun_floppy_types[1] = config; | |
796 | ||
797 | if (sun_pci_broken_drive != -1) { | |
798 | sun_pci_broken_drive = 1 - sun_pci_broken_drive; | |
799 | sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb; | |
800 | } | |
801 | } | |
802 | #endif /* PCI_FDC_SWAP_DRIVES */ | |
803 | ||
804 | return sun_floppy_types[0]; | |
805 | #else | |
806 | return 0; | |
807 | #endif | |
808 | } | |
809 | prom_getproperty(sdev->prom_node, "status", state, sizeof(state)); | |
810 | if(!strncmp(state, "disabled", 8)) | |
811 | return 0; | |
812 | ||
813 | /* | |
814 | * We cannot do sbus_ioremap here: it does request_region, | |
815 | * which the generic floppy driver tries to do once again. | |
816 | * But we must use the sdev resource values as they have | |
817 | * had parent ranges applied. | |
818 | */ | |
819 | sun_fdc = (struct sun_flpy_controller *) | |
820 | (sdev->resource[0].start + | |
821 | ((sdev->resource[0].flags & 0x1ffUL) << 32UL)); | |
822 | ||
823 | /* Last minute sanity check... */ | |
824 | if(sbus_readb(&sun_fdc->status1_82077) == 0xff) { | |
825 | sun_fdc = (struct sun_flpy_controller *)-1; | |
826 | return 0; | |
827 | } | |
828 | ||
829 | sun_fdops.fd_inb = sun_82077_fd_inb; | |
830 | sun_fdops.fd_outb = sun_82077_fd_outb; | |
831 | ||
832 | can_use_virtual_dma = use_virtual_dma = 1; | |
833 | sun_fdops.fd_enable_dma = sun_fd_enable_dma; | |
834 | sun_fdops.fd_disable_dma = sun_fd_disable_dma; | |
835 | sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode; | |
836 | sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr; | |
837 | sun_fdops.fd_set_dma_count = sun_fd_set_dma_count; | |
838 | sun_fdops.get_dma_residue = sun_get_dma_residue; | |
839 | ||
840 | sun_fdops.fd_request_irq = sun_fd_request_irq; | |
841 | sun_fdops.fd_free_irq = sun_fd_free_irq; | |
842 | ||
843 | sun_fdops.fd_eject = sun_fd_eject; | |
844 | ||
845 | fdc_status = (unsigned long) &sun_fdc->status_82077; | |
846 | ||
847 | /* Success... */ | |
848 | allowed_drive_mask = 0x01; | |
849 | sun_floppy_types[0] = 4; | |
850 | sun_floppy_types[1] = 0; | |
851 | ||
852 | return sun_floppy_types[0]; | |
853 | } | |
854 | ||
855 | #define EXTRA_FLOPPY_PARAMS | |
856 | ||
857 | #endif /* !(__ASM_SPARC64_FLOPPY_H) */ |