Commit | Line | Data |
---|---|---|
9b539c03 | 1 | /* floppy.h: Sparc specific parts of the Floppy driver. |
1da177e4 | 2 | * |
9b539c03 | 3 | * Copyright (C) 1996, 2007 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
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 | ||
1da177e4 | 12 | #include <linux/init.h> |
9b539c03 | 13 | #include <linux/pci.h> |
1da177e4 LT |
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 | ||
1da177e4 LT |
87 | /* Super paranoid... */ |
88 | #undef HAVE_DISABLE_HLT | |
89 | ||
90 | static int sun_floppy_types[2] = { 0, 0 }; | |
91 | ||
92 | /* Here is where we catch the floppy driver trying to initialize, | |
93 | * therefore this is where we call the PROM device tree probing | |
94 | * routine etc. on the Sparc. | |
95 | */ | |
96 | #define FLOPPY0_TYPE sun_floppy_init() | |
97 | #define FLOPPY1_TYPE sun_floppy_types[1] | |
98 | ||
99 | #define FDC1 ((unsigned long)sun_fdc) | |
100 | ||
101 | #define N_FDC 1 | |
102 | #define N_DRIVE 8 | |
103 | ||
104 | /* No 64k boundary crossing problems on the Sparc. */ | |
105 | #define CROSS_64KB(a,s) (0) | |
106 | ||
107 | static unsigned char sun_82077_fd_inb(unsigned long port) | |
108 | { | |
109 | udelay(5); | |
110 | switch(port & 7) { | |
111 | default: | |
112 | printk("floppy: Asked to read unknown port %lx\n", port); | |
113 | panic("floppy: Port bolixed."); | |
114 | case 4: /* FD_STATUS */ | |
115 | return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA; | |
116 | case 5: /* FD_DATA */ | |
117 | return sbus_readb(&sun_fdc->data_82077); | |
118 | case 7: /* FD_DIR */ | |
119 | /* XXX: Is DCL on 0x80 in sun4m? */ | |
120 | return sbus_readb(&sun_fdc->dir_82077); | |
121 | }; | |
122 | panic("sun_82072_fd_inb: How did I get here?"); | |
123 | } | |
124 | ||
125 | static void sun_82077_fd_outb(unsigned char value, unsigned long port) | |
126 | { | |
127 | udelay(5); | |
128 | switch(port & 7) { | |
129 | default: | |
130 | printk("floppy: Asked to write to unknown port %lx\n", port); | |
131 | panic("floppy: Port bolixed."); | |
132 | case 2: /* FD_DOR */ | |
133 | /* Happily, the 82077 has a real DOR register. */ | |
134 | sbus_writeb(value, &sun_fdc->dor_82077); | |
135 | break; | |
136 | case 5: /* FD_DATA */ | |
137 | sbus_writeb(value, &sun_fdc->data_82077); | |
138 | break; | |
139 | case 7: /* FD_DCR */ | |
140 | sbus_writeb(value, &sun_fdc->dcr_82077); | |
141 | break; | |
142 | case 4: /* FD_STATUS */ | |
143 | sbus_writeb(value, &sun_fdc->status_82077); | |
144 | break; | |
145 | }; | |
146 | return; | |
147 | } | |
148 | ||
149 | /* For pseudo-dma (Sun floppy drives have no real DMA available to | |
150 | * them so we must eat the data fifo bytes directly ourselves) we have | |
151 | * three state variables. doing_pdma tells our inline low-level | |
152 | * assembly floppy interrupt entry point whether it should sit and eat | |
153 | * bytes from the fifo or just transfer control up to the higher level | |
154 | * floppy interrupt c-code. I tried very hard but I could not get the | |
155 | * pseudo-dma to work in c-code without getting many overruns and | |
156 | * underruns. If non-zero, doing_pdma encodes the direction of | |
157 | * the transfer for debugging. 1=read 2=write | |
158 | */ | |
63b61452 | 159 | unsigned char *pdma_vaddr; |
1da177e4 LT |
160 | unsigned long pdma_size; |
161 | volatile int doing_pdma = 0; | |
162 | ||
163 | /* This is software state */ | |
164 | char *pdma_base = NULL; | |
165 | unsigned long pdma_areasize; | |
166 | ||
167 | /* Common routines to all controller types on the Sparc. */ | |
168 | static void sun_fd_disable_dma(void) | |
169 | { | |
170 | doing_pdma = 0; | |
171 | if (pdma_base) { | |
172 | mmu_unlockarea(pdma_base, pdma_areasize); | |
173 | pdma_base = NULL; | |
174 | } | |
175 | } | |
176 | ||
177 | static void sun_fd_set_dma_mode(int mode) | |
178 | { | |
179 | switch(mode) { | |
180 | case DMA_MODE_READ: | |
181 | doing_pdma = 1; | |
182 | break; | |
183 | case DMA_MODE_WRITE: | |
184 | doing_pdma = 2; | |
185 | break; | |
186 | default: | |
187 | printk("Unknown dma mode %d\n", mode); | |
188 | panic("floppy: Giving up..."); | |
189 | } | |
190 | } | |
191 | ||
192 | static void sun_fd_set_dma_addr(char *buffer) | |
193 | { | |
194 | pdma_vaddr = buffer; | |
195 | } | |
196 | ||
197 | static void sun_fd_set_dma_count(int length) | |
198 | { | |
199 | pdma_size = length; | |
200 | } | |
201 | ||
202 | static void sun_fd_enable_dma(void) | |
203 | { | |
204 | pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size); | |
205 | pdma_base = pdma_vaddr; | |
206 | pdma_areasize = pdma_size; | |
207 | } | |
208 | ||
6d24c8dc | 209 | irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie) |
35055996 DM |
210 | { |
211 | if (likely(doing_pdma)) { | |
212 | void __iomem *stat = (void __iomem *) fdc_status; | |
213 | unsigned char *vaddr = pdma_vaddr; | |
214 | unsigned long size = pdma_size; | |
215 | u8 val; | |
216 | ||
217 | while (size) { | |
218 | val = readb(stat); | |
219 | if (unlikely(!(val & 0x80))) { | |
220 | pdma_vaddr = vaddr; | |
221 | pdma_size = size; | |
222 | return IRQ_HANDLED; | |
223 | } | |
224 | if (unlikely(!(val & 0x20))) { | |
225 | pdma_vaddr = vaddr; | |
226 | pdma_size = size; | |
227 | doing_pdma = 0; | |
228 | goto main_interrupt; | |
229 | } | |
230 | if (val & 0x40) { | |
231 | /* read */ | |
232 | *vaddr++ = readb(stat + 1); | |
233 | } else { | |
234 | unsigned char data = *vaddr++; | |
235 | ||
236 | /* write */ | |
237 | writeb(data, stat + 1); | |
238 | } | |
239 | size--; | |
240 | } | |
241 | ||
242 | pdma_vaddr = vaddr; | |
243 | pdma_size = size; | |
244 | ||
245 | /* Send Terminal Count pulse to floppy controller. */ | |
246 | val = readb(auxio_register); | |
247 | val |= AUXIO_AUX1_FTCNT; | |
248 | writeb(val, auxio_register); | |
249 | val &= ~AUXIO_AUX1_FTCNT; | |
250 | writeb(val, auxio_register); | |
251 | ||
252 | doing_pdma = 0; | |
253 | } | |
254 | ||
255 | main_interrupt: | |
6d24c8dc | 256 | return floppy_interrupt(irq, dev_cookie); |
35055996 | 257 | } |
1da177e4 LT |
258 | |
259 | static int sun_fd_request_irq(void) | |
260 | { | |
261 | static int once = 0; | |
262 | int error; | |
263 | ||
264 | if(!once) { | |
265 | once = 1; | |
266 | ||
63b61452 | 267 | error = request_irq(FLOPPY_IRQ, sparc_floppy_irq, |
d356d7f4 | 268 | IRQF_DISABLED, "floppy", NULL); |
1da177e4 LT |
269 | |
270 | return ((error == 0) ? 0 : -1); | |
271 | } | |
272 | return 0; | |
273 | } | |
274 | ||
275 | static void sun_fd_free_irq(void) | |
276 | { | |
277 | } | |
278 | ||
279 | static unsigned int sun_get_dma_residue(void) | |
280 | { | |
281 | /* XXX This isn't really correct. XXX */ | |
282 | return 0; | |
283 | } | |
284 | ||
285 | static int sun_fd_eject(int drive) | |
286 | { | |
287 | set_dor(0x00, 0xff, 0x90); | |
288 | udelay(500); | |
289 | set_dor(0x00, 0x6f, 0x00); | |
290 | udelay(500); | |
291 | return 0; | |
292 | } | |
293 | ||
294 | #ifdef CONFIG_PCI | |
295 | #include <asm/ebus.h> | |
296 | #include <asm/isa.h> | |
297 | #include <asm/ns87303.h> | |
298 | ||
299 | static struct ebus_dma_info sun_pci_fd_ebus_dma; | |
300 | static struct pci_dev *sun_pci_ebus_dev; | |
301 | static int sun_pci_broken_drive = -1; | |
302 | ||
303 | struct sun_pci_dma_op { | |
304 | unsigned int addr; | |
305 | int len; | |
306 | int direction; | |
307 | char *buf; | |
308 | }; | |
309 | static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL}; | |
310 | static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL}; | |
311 | ||
6d24c8dc | 312 | extern irqreturn_t floppy_interrupt(int irq, void *dev_id); |
1da177e4 LT |
313 | |
314 | static unsigned char sun_pci_fd_inb(unsigned long port) | |
315 | { | |
316 | udelay(5); | |
317 | return inb(port); | |
318 | } | |
319 | ||
320 | static void sun_pci_fd_outb(unsigned char val, unsigned long port) | |
321 | { | |
322 | udelay(5); | |
323 | outb(val, port); | |
324 | } | |
325 | ||
326 | static void sun_pci_fd_broken_outb(unsigned char val, unsigned long port) | |
327 | { | |
328 | udelay(5); | |
329 | /* | |
330 | * XXX: Due to SUN's broken floppy connector on AX and AXi | |
331 | * we need to turn on MOTOR_0 also, if the floppy is | |
332 | * jumpered to DS1 (like most PC floppies are). I hope | |
333 | * this does not hurt correct hardware like the AXmp. | |
334 | * (Eddie, Sep 12 1998). | |
335 | */ | |
336 | if (port == ((unsigned long)sun_fdc) + 2) { | |
337 | if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x20)) { | |
338 | val |= 0x10; | |
339 | } | |
340 | } | |
341 | outb(val, port); | |
342 | } | |
343 | ||
344 | #ifdef PCI_FDC_SWAP_DRIVES | |
345 | static void sun_pci_fd_lde_broken_outb(unsigned char val, unsigned long port) | |
346 | { | |
347 | udelay(5); | |
348 | /* | |
349 | * XXX: Due to SUN's broken floppy connector on AX and AXi | |
350 | * we need to turn on MOTOR_0 also, if the floppy is | |
351 | * jumpered to DS1 (like most PC floppies are). I hope | |
352 | * this does not hurt correct hardware like the AXmp. | |
353 | * (Eddie, Sep 12 1998). | |
354 | */ | |
355 | if (port == ((unsigned long)sun_fdc) + 2) { | |
356 | if (((val & 0x03) == sun_pci_broken_drive) && (val & 0x10)) { | |
357 | val &= ~(0x03); | |
358 | val |= 0x21; | |
359 | } | |
360 | } | |
361 | outb(val, port); | |
362 | } | |
363 | #endif /* PCI_FDC_SWAP_DRIVES */ | |
364 | ||
365 | static void sun_pci_fd_enable_dma(void) | |
366 | { | |
367 | BUG_ON((NULL == sun_pci_dma_pending.buf) || | |
368 | (0 == sun_pci_dma_pending.len) || | |
369 | (0 == sun_pci_dma_pending.direction)); | |
370 | ||
371 | sun_pci_dma_current.buf = sun_pci_dma_pending.buf; | |
372 | sun_pci_dma_current.len = sun_pci_dma_pending.len; | |
373 | sun_pci_dma_current.direction = sun_pci_dma_pending.direction; | |
374 | ||
375 | sun_pci_dma_pending.buf = NULL; | |
376 | sun_pci_dma_pending.len = 0; | |
377 | sun_pci_dma_pending.direction = 0; | |
378 | sun_pci_dma_pending.addr = -1U; | |
379 | ||
380 | sun_pci_dma_current.addr = | |
381 | pci_map_single(sun_pci_ebus_dev, | |
382 | sun_pci_dma_current.buf, | |
383 | sun_pci_dma_current.len, | |
384 | sun_pci_dma_current.direction); | |
385 | ||
386 | ebus_dma_enable(&sun_pci_fd_ebus_dma, 1); | |
387 | ||
388 | if (ebus_dma_request(&sun_pci_fd_ebus_dma, | |
389 | sun_pci_dma_current.addr, | |
390 | sun_pci_dma_current.len)) | |
391 | BUG(); | |
392 | } | |
393 | ||
394 | static void sun_pci_fd_disable_dma(void) | |
395 | { | |
396 | ebus_dma_enable(&sun_pci_fd_ebus_dma, 0); | |
397 | if (sun_pci_dma_current.addr != -1U) | |
398 | pci_unmap_single(sun_pci_ebus_dev, | |
399 | sun_pci_dma_current.addr, | |
400 | sun_pci_dma_current.len, | |
401 | sun_pci_dma_current.direction); | |
402 | sun_pci_dma_current.addr = -1U; | |
403 | } | |
404 | ||
405 | static void sun_pci_fd_set_dma_mode(int mode) | |
406 | { | |
407 | if (mode == DMA_MODE_WRITE) | |
408 | sun_pci_dma_pending.direction = PCI_DMA_TODEVICE; | |
409 | else | |
410 | sun_pci_dma_pending.direction = PCI_DMA_FROMDEVICE; | |
411 | ||
412 | ebus_dma_prepare(&sun_pci_fd_ebus_dma, mode != DMA_MODE_WRITE); | |
413 | } | |
414 | ||
415 | static void sun_pci_fd_set_dma_count(int length) | |
416 | { | |
417 | sun_pci_dma_pending.len = length; | |
418 | } | |
419 | ||
420 | static void sun_pci_fd_set_dma_addr(char *buffer) | |
421 | { | |
422 | sun_pci_dma_pending.buf = buffer; | |
423 | } | |
424 | ||
425 | static unsigned int sun_pci_get_dma_residue(void) | |
426 | { | |
427 | return ebus_dma_residue(&sun_pci_fd_ebus_dma); | |
428 | } | |
429 | ||
430 | static int sun_pci_fd_request_irq(void) | |
431 | { | |
432 | return ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 1); | |
433 | } | |
434 | ||
435 | static void sun_pci_fd_free_irq(void) | |
436 | { | |
437 | ebus_dma_irq_enable(&sun_pci_fd_ebus_dma, 0); | |
438 | } | |
439 | ||
440 | static int sun_pci_fd_eject(int drive) | |
441 | { | |
442 | return -EINVAL; | |
443 | } | |
444 | ||
445 | void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie) | |
446 | { | |
6d24c8dc | 447 | floppy_interrupt(0, NULL); |
1da177e4 LT |
448 | } |
449 | ||
450 | /* | |
451 | * Floppy probing, we'd like to use /dev/fd0 for a single Floppy on PCI, | |
452 | * even if this is configured using DS1, thus looks like /dev/fd1 with | |
453 | * the cabling used in Ultras. | |
454 | */ | |
455 | #define DOR (port + 2) | |
456 | #define MSR (port + 4) | |
457 | #define FIFO (port + 5) | |
458 | ||
459 | static void sun_pci_fd_out_byte(unsigned long port, unsigned char val, | |
460 | unsigned long reg) | |
461 | { | |
462 | unsigned char status; | |
463 | int timeout = 1000; | |
464 | ||
465 | while (!((status = inb(MSR)) & 0x80) && --timeout) | |
466 | udelay(100); | |
467 | outb(val, reg); | |
468 | } | |
469 | ||
470 | static unsigned char sun_pci_fd_sensei(unsigned long port) | |
471 | { | |
472 | unsigned char result[2] = { 0x70, 0x00 }; | |
473 | unsigned char status; | |
474 | int i = 0; | |
475 | ||
476 | sun_pci_fd_out_byte(port, 0x08, FIFO); | |
477 | do { | |
478 | int timeout = 1000; | |
479 | ||
480 | while (!((status = inb(MSR)) & 0x80) && --timeout) | |
481 | udelay(100); | |
482 | ||
483 | if (!timeout) | |
484 | break; | |
485 | ||
486 | if ((status & 0xf0) == 0xd0) | |
487 | result[i++] = inb(FIFO); | |
488 | else | |
489 | break; | |
490 | } while (i < 2); | |
491 | ||
492 | return result[0]; | |
493 | } | |
494 | ||
495 | static void sun_pci_fd_reset(unsigned long port) | |
496 | { | |
497 | unsigned char mask = 0x00; | |
498 | unsigned char status; | |
499 | int timeout = 10000; | |
500 | ||
501 | outb(0x80, MSR); | |
502 | do { | |
503 | status = sun_pci_fd_sensei(port); | |
504 | if ((status & 0xc0) == 0xc0) | |
505 | mask |= 1 << (status & 0x03); | |
506 | else | |
507 | udelay(100); | |
508 | } while ((mask != 0x0f) && --timeout); | |
509 | } | |
510 | ||
511 | static int sun_pci_fd_test_drive(unsigned long port, int drive) | |
512 | { | |
513 | unsigned char status, data; | |
514 | int timeout = 1000; | |
515 | int ready; | |
516 | ||
517 | sun_pci_fd_reset(port); | |
518 | ||
519 | data = (0x10 << drive) | 0x0c | drive; | |
520 | sun_pci_fd_out_byte(port, data, DOR); | |
521 | ||
522 | sun_pci_fd_out_byte(port, 0x07, FIFO); | |
523 | sun_pci_fd_out_byte(port, drive & 0x03, FIFO); | |
524 | ||
525 | do { | |
526 | udelay(100); | |
527 | status = sun_pci_fd_sensei(port); | |
528 | } while (((status & 0xc0) == 0x80) && --timeout); | |
529 | ||
530 | if (!timeout) | |
531 | ready = 0; | |
532 | else | |
533 | ready = (status & 0x10) ? 0 : 1; | |
534 | ||
535 | sun_pci_fd_reset(port); | |
536 | return ready; | |
537 | } | |
538 | #undef FIFO | |
539 | #undef MSR | |
540 | #undef DOR | |
541 | ||
542 | #endif /* CONFIG_PCI */ | |
543 | ||
544 | #ifdef CONFIG_PCI | |
545 | static int __init ebus_fdthree_p(struct linux_ebus_device *edev) | |
546 | { | |
690c8fd3 | 547 | if (!strcmp(edev->prom_node->name, "fdthree")) |
1da177e4 | 548 | return 1; |
690c8fd3 | 549 | if (!strcmp(edev->prom_node->name, "floppy")) { |
66f3cb7c | 550 | const char *compat; |
690c8fd3 DM |
551 | |
552 | compat = of_get_property(edev->prom_node, | |
553 | "compatible", NULL); | |
554 | if (compat && !strcmp(compat, "fdthree")) | |
1da177e4 LT |
555 | return 1; |
556 | } | |
557 | return 0; | |
558 | } | |
559 | #endif | |
560 | ||
561 | #ifdef CONFIG_PCI | |
562 | #undef ISA_FLOPPY_WORKS | |
563 | ||
564 | #ifdef ISA_FLOPPY_WORKS | |
565 | static unsigned long __init isa_floppy_init(void) | |
566 | { | |
567 | struct sparc_isa_bridge *isa_br; | |
568 | struct sparc_isa_device *isa_dev = NULL; | |
569 | ||
570 | for_each_isa(isa_br) { | |
571 | for_each_isadev(isa_dev, isa_br) { | |
690c8fd3 | 572 | if (!strcmp(isa_dev->prom_node->name, "dma")) { |
1da177e4 LT |
573 | struct sparc_isa_device *child = |
574 | isa_dev->child; | |
575 | ||
576 | while (child) { | |
690c8fd3 | 577 | if (!strcmp(child->prom_node->name, |
1da177e4 LT |
578 | "floppy")) { |
579 | isa_dev = child; | |
580 | goto isa_done; | |
581 | } | |
582 | child = child->next; | |
583 | } | |
584 | } | |
585 | } | |
586 | } | |
587 | isa_done: | |
588 | if (!isa_dev) | |
589 | return 0; | |
590 | ||
591 | /* We could use DMA on devices behind the ISA bridge, but... | |
592 | * | |
593 | * There is a slight problem. Normally on x86 kit the x86 processor | |
594 | * delays I/O port instructions when the ISA bus "dma in progress" | |
595 | * signal is active. Well, sparc64 systems do not monitor this | |
596 | * signal thus we would need to block all I/O port accesses in software | |
597 | * when a dma transfer is active for some device. | |
598 | */ | |
599 | ||
600 | sun_fdc = (struct sun_flpy_controller *)isa_dev->resource.start; | |
601 | FLOPPY_IRQ = isa_dev->irq; | |
602 | ||
603 | sun_fdops.fd_inb = sun_pci_fd_inb; | |
604 | sun_fdops.fd_outb = sun_pci_fd_outb; | |
605 | ||
606 | can_use_virtual_dma = use_virtual_dma = 1; | |
607 | sun_fdops.fd_enable_dma = sun_fd_enable_dma; | |
608 | sun_fdops.fd_disable_dma = sun_fd_disable_dma; | |
609 | sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode; | |
610 | sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr; | |
611 | sun_fdops.fd_set_dma_count = sun_fd_set_dma_count; | |
612 | sun_fdops.get_dma_residue = sun_get_dma_residue; | |
613 | ||
614 | sun_fdops.fd_request_irq = sun_fd_request_irq; | |
615 | sun_fdops.fd_free_irq = sun_fd_free_irq; | |
616 | ||
617 | /* Floppy eject is manual. Actually, could determine this | |
618 | * via presence of 'manual' property in OBP node. | |
619 | */ | |
620 | sun_fdops.fd_eject = sun_pci_fd_eject; | |
621 | ||
622 | fdc_status = (unsigned long) &sun_fdc->status_82077; | |
1da177e4 LT |
623 | |
624 | allowed_drive_mask = 0; | |
625 | sun_floppy_types[0] = 0; | |
626 | sun_floppy_types[1] = 4; | |
627 | ||
628 | sun_pci_broken_drive = 1; | |
629 | sun_fdops.fd_outb = sun_pci_fd_broken_outb; | |
630 | ||
631 | return sun_floppy_types[0]; | |
632 | } | |
633 | #endif /* ISA_FLOPPY_WORKS */ | |
634 | ||
635 | #endif | |
636 | ||
637 | static unsigned long __init sun_floppy_init(void) | |
638 | { | |
639 | char state[128]; | |
640 | struct sbus_bus *bus; | |
641 | struct sbus_dev *sdev = NULL; | |
642 | static int initialized = 0; | |
643 | ||
644 | if (initialized) | |
645 | return sun_floppy_types[0]; | |
646 | initialized = 1; | |
647 | ||
648 | for_all_sbusdev (sdev, bus) { | |
649 | if (!strcmp(sdev->prom_name, "SUNW,fdtwo")) | |
650 | break; | |
651 | } | |
652 | if(sdev) { | |
653 | floppy_sdev = sdev; | |
654 | FLOPPY_IRQ = sdev->irqs[0]; | |
655 | } else { | |
656 | #ifdef CONFIG_PCI | |
657 | struct linux_ebus *ebus; | |
658 | struct linux_ebus_device *edev = NULL; | |
659 | unsigned long config = 0; | |
63b61452 | 660 | void __iomem *auxio_reg; |
66f3cb7c | 661 | const char *state_prop; |
1da177e4 LT |
662 | |
663 | for_each_ebus(ebus) { | |
664 | for_each_ebusdev(edev, ebus) { | |
665 | if (ebus_fdthree_p(edev)) | |
666 | goto ebus_done; | |
667 | } | |
668 | } | |
669 | ebus_done: | |
670 | if (!edev) { | |
671 | #ifdef ISA_FLOPPY_WORKS | |
672 | return isa_floppy_init(); | |
673 | #else | |
674 | return 0; | |
675 | #endif | |
676 | } | |
677 | ||
690c8fd3 DM |
678 | state_prop = of_get_property(edev->prom_node, "status", NULL); |
679 | if (state_prop && !strncmp(state_prop, "disabled", 8)) | |
1da177e4 LT |
680 | return 0; |
681 | ||
682 | FLOPPY_IRQ = edev->irqs[0]; | |
683 | ||
684 | /* Make sure the high density bit is set, some systems | |
685 | * (most notably Ultra5/Ultra10) come up with it clear. | |
686 | */ | |
63b61452 | 687 | auxio_reg = (void __iomem *) edev->resource[2].start; |
1da177e4 LT |
688 | writel(readl(auxio_reg)|0x2, auxio_reg); |
689 | ||
690 | sun_pci_ebus_dev = ebus->self; | |
691 | ||
692 | spin_lock_init(&sun_pci_fd_ebus_dma.lock); | |
693 | ||
694 | /* XXX ioremap */ | |
63b61452 DM |
695 | sun_pci_fd_ebus_dma.regs = (void __iomem *) |
696 | edev->resource[1].start; | |
1da177e4 LT |
697 | if (!sun_pci_fd_ebus_dma.regs) |
698 | return 0; | |
699 | ||
700 | sun_pci_fd_ebus_dma.flags = (EBUS_DMA_FLAG_USE_EBDMA_HANDLER | | |
701 | EBUS_DMA_FLAG_TCI_DISABLE); | |
702 | sun_pci_fd_ebus_dma.callback = sun_pci_fd_dma_callback; | |
703 | sun_pci_fd_ebus_dma.client_cookie = NULL; | |
704 | sun_pci_fd_ebus_dma.irq = FLOPPY_IRQ; | |
705 | strcpy(sun_pci_fd_ebus_dma.name, "floppy"); | |
706 | if (ebus_dma_register(&sun_pci_fd_ebus_dma)) | |
707 | return 0; | |
708 | ||
709 | /* XXX ioremap */ | |
710 | sun_fdc = (struct sun_flpy_controller *)edev->resource[0].start; | |
711 | ||
712 | sun_fdops.fd_inb = sun_pci_fd_inb; | |
713 | sun_fdops.fd_outb = sun_pci_fd_outb; | |
714 | ||
715 | can_use_virtual_dma = use_virtual_dma = 0; | |
716 | sun_fdops.fd_enable_dma = sun_pci_fd_enable_dma; | |
717 | sun_fdops.fd_disable_dma = sun_pci_fd_disable_dma; | |
718 | sun_fdops.fd_set_dma_mode = sun_pci_fd_set_dma_mode; | |
719 | sun_fdops.fd_set_dma_addr = sun_pci_fd_set_dma_addr; | |
720 | sun_fdops.fd_set_dma_count = sun_pci_fd_set_dma_count; | |
721 | sun_fdops.get_dma_residue = sun_pci_get_dma_residue; | |
722 | ||
723 | sun_fdops.fd_request_irq = sun_pci_fd_request_irq; | |
724 | sun_fdops.fd_free_irq = sun_pci_fd_free_irq; | |
725 | ||
726 | sun_fdops.fd_eject = sun_pci_fd_eject; | |
727 | ||
728 | fdc_status = (unsigned long) &sun_fdc->status_82077; | |
1da177e4 LT |
729 | |
730 | /* | |
731 | * XXX: Find out on which machines this is really needed. | |
732 | */ | |
733 | if (1) { | |
734 | sun_pci_broken_drive = 1; | |
735 | sun_fdops.fd_outb = sun_pci_fd_broken_outb; | |
736 | } | |
737 | ||
738 | allowed_drive_mask = 0; | |
739 | if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 0)) | |
740 | sun_floppy_types[0] = 4; | |
741 | if (sun_pci_fd_test_drive((unsigned long)sun_fdc, 1)) | |
742 | sun_floppy_types[1] = 4; | |
743 | ||
744 | /* | |
745 | * Find NS87303 SuperIO config registers (through ecpp). | |
746 | */ | |
747 | for_each_ebus(ebus) { | |
748 | for_each_ebusdev(edev, ebus) { | |
690c8fd3 | 749 | if (!strcmp(edev->prom_node->name, "ecpp")) { |
1da177e4 LT |
750 | config = edev->resource[1].start; |
751 | goto config_done; | |
752 | } | |
753 | } | |
754 | } | |
755 | config_done: | |
756 | ||
757 | /* | |
758 | * Sanity check, is this really the NS87303? | |
759 | */ | |
760 | switch (config & 0x3ff) { | |
761 | case 0x02e: | |
762 | case 0x15c: | |
763 | case 0x26e: | |
764 | case 0x398: | |
765 | break; | |
766 | default: | |
767 | config = 0; | |
768 | } | |
769 | ||
770 | if (!config) | |
771 | return sun_floppy_types[0]; | |
772 | ||
773 | /* Enable PC-AT mode. */ | |
774 | ns87303_modify(config, ASC, 0, 0xc0); | |
775 | ||
776 | #ifdef PCI_FDC_SWAP_DRIVES | |
777 | /* | |
778 | * If only Floppy 1 is present, swap drives. | |
779 | */ | |
780 | if (!sun_floppy_types[0] && sun_floppy_types[1]) { | |
781 | /* | |
782 | * Set the drive exchange bit in FCR on NS87303, | |
7f927fcc | 783 | * make sure other bits are sane before doing so. |
1da177e4 LT |
784 | */ |
785 | ns87303_modify(config, FER, FER_EDM, 0); | |
786 | ns87303_modify(config, ASC, ASC_DRV2_SEL, 0); | |
787 | ns87303_modify(config, FCR, 0, FCR_LDE); | |
788 | ||
789 | config = sun_floppy_types[0]; | |
790 | sun_floppy_types[0] = sun_floppy_types[1]; | |
791 | sun_floppy_types[1] = config; | |
792 | ||
793 | if (sun_pci_broken_drive != -1) { | |
794 | sun_pci_broken_drive = 1 - sun_pci_broken_drive; | |
795 | sun_fdops.fd_outb = sun_pci_fd_lde_broken_outb; | |
796 | } | |
797 | } | |
798 | #endif /* PCI_FDC_SWAP_DRIVES */ | |
799 | ||
800 | return sun_floppy_types[0]; | |
801 | #else | |
802 | return 0; | |
803 | #endif | |
804 | } | |
805 | prom_getproperty(sdev->prom_node, "status", state, sizeof(state)); | |
806 | if(!strncmp(state, "disabled", 8)) | |
807 | return 0; | |
808 | ||
809 | /* | |
810 | * We cannot do sbus_ioremap here: it does request_region, | |
811 | * which the generic floppy driver tries to do once again. | |
812 | * But we must use the sdev resource values as they have | |
813 | * had parent ranges applied. | |
814 | */ | |
815 | sun_fdc = (struct sun_flpy_controller *) | |
816 | (sdev->resource[0].start + | |
817 | ((sdev->resource[0].flags & 0x1ffUL) << 32UL)); | |
818 | ||
819 | /* Last minute sanity check... */ | |
820 | if(sbus_readb(&sun_fdc->status1_82077) == 0xff) { | |
821 | sun_fdc = (struct sun_flpy_controller *)-1; | |
822 | return 0; | |
823 | } | |
824 | ||
825 | sun_fdops.fd_inb = sun_82077_fd_inb; | |
826 | sun_fdops.fd_outb = sun_82077_fd_outb; | |
827 | ||
828 | can_use_virtual_dma = use_virtual_dma = 1; | |
829 | sun_fdops.fd_enable_dma = sun_fd_enable_dma; | |
830 | sun_fdops.fd_disable_dma = sun_fd_disable_dma; | |
831 | sun_fdops.fd_set_dma_mode = sun_fd_set_dma_mode; | |
832 | sun_fdops.fd_set_dma_addr = sun_fd_set_dma_addr; | |
833 | sun_fdops.fd_set_dma_count = sun_fd_set_dma_count; | |
834 | sun_fdops.get_dma_residue = sun_get_dma_residue; | |
835 | ||
836 | sun_fdops.fd_request_irq = sun_fd_request_irq; | |
837 | sun_fdops.fd_free_irq = sun_fd_free_irq; | |
838 | ||
839 | sun_fdops.fd_eject = sun_fd_eject; | |
840 | ||
841 | fdc_status = (unsigned long) &sun_fdc->status_82077; | |
842 | ||
843 | /* Success... */ | |
844 | allowed_drive_mask = 0x01; | |
845 | sun_floppy_types[0] = 4; | |
846 | sun_floppy_types[1] = 0; | |
847 | ||
848 | return sun_floppy_types[0]; | |
849 | } | |
850 | ||
851 | #define EXTRA_FLOPPY_PARAMS | |
852 | ||
78ad0b84 DM |
853 | static DEFINE_SPINLOCK(dma_spin_lock); |
854 | ||
855 | #define claim_dma_lock() \ | |
856 | ({ unsigned long flags; \ | |
857 | spin_lock_irqsave(&dma_spin_lock, flags); \ | |
858 | flags; \ | |
859 | }) | |
860 | ||
861 | #define release_dma_lock(__flags) \ | |
862 | spin_unlock_irqrestore(&dma_spin_lock, __flags); | |
863 | ||
1da177e4 | 864 | #endif /* !(__ASM_SPARC64_FLOPPY_H) */ |