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-rw-r--r--include/asm-sparc/floppy.h394
1 files changed, 7 insertions, 387 deletions
diff --git a/include/asm-sparc/floppy.h b/include/asm-sparc/floppy.h
index d3978e068e2b..6c628ba15a8d 100644
--- a/include/asm-sparc/floppy.h
+++ b/include/asm-sparc/floppy.h
@@ -1,388 +1,8 @@
1/* asm-sparc/floppy.h: Sparc specific parts of the Floppy driver. 1#ifndef ___ASM_SPARC_FLOPPY_H
2 * 2#define ___ASM_SPARC_FLOPPY_H
3 * Copyright (C) 1995 David S. Miller (davem@davemloft.net) 3#if defined(__sparc__) && defined(__arch64__)
4 */ 4#include <asm-sparc/floppy_64.h>
5 5#else
6#ifndef __ASM_SPARC_FLOPPY_H 6#include <asm-sparc/floppy_32.h>
7#define __ASM_SPARC_FLOPPY_H 7#endif
8
9#include <asm/page.h>
10#include <asm/pgtable.h>
11#include <asm/system.h>
12#include <asm/idprom.h>
13#include <asm/machines.h>
14#include <asm/oplib.h>
15#include <asm/auxio.h>
16#include <asm/irq.h>
17
18/* We don't need no stinkin' I/O port allocation crap. */
19#undef release_region
20#undef request_region
21#define release_region(X, Y) do { } while(0)
22#define request_region(X, Y, Z) (1)
23
24/* References:
25 * 1) Netbsd Sun floppy driver.
26 * 2) NCR 82077 controller manual
27 * 3) Intel 82077 controller manual
28 */
29struct sun_flpy_controller {
30 volatile unsigned char status_82072; /* Main Status reg. */
31#define dcr_82072 status_82072 /* Digital Control reg. */
32#define status1_82077 status_82072 /* Auxiliary Status reg. 1 */
33
34 volatile unsigned char data_82072; /* Data fifo. */
35#define status2_82077 data_82072 /* Auxiliary Status reg. 2 */
36
37 volatile unsigned char dor_82077; /* Digital Output reg. */
38 volatile unsigned char tapectl_82077; /* What the? Tape control reg? */
39
40 volatile unsigned char status_82077; /* Main Status Register. */
41#define drs_82077 status_82077 /* Digital Rate Select reg. */
42
43 volatile unsigned char data_82077; /* Data fifo. */
44 volatile unsigned char ___unused;
45 volatile unsigned char dir_82077; /* Digital Input reg. */
46#define dcr_82077 dir_82077 /* Config Control reg. */
47};
48
49/* You'll only ever find one controller on a SparcStation anyways. */
50static struct sun_flpy_controller *sun_fdc = NULL;
51extern volatile unsigned char *fdc_status;
52
53struct sun_floppy_ops {
54 unsigned char (*fd_inb)(int port);
55 void (*fd_outb)(unsigned char value, int port);
56};
57
58static struct sun_floppy_ops sun_fdops;
59
60#define fd_inb(port) sun_fdops.fd_inb(port)
61#define fd_outb(value,port) sun_fdops.fd_outb(value,port)
62#define fd_enable_dma() sun_fd_enable_dma()
63#define fd_disable_dma() sun_fd_disable_dma()
64#define fd_request_dma() (0) /* nothing... */
65#define fd_free_dma() /* nothing... */
66#define fd_clear_dma_ff() /* nothing... */
67#define fd_set_dma_mode(mode) sun_fd_set_dma_mode(mode)
68#define fd_set_dma_addr(addr) sun_fd_set_dma_addr(addr)
69#define fd_set_dma_count(count) sun_fd_set_dma_count(count)
70#define fd_enable_irq() /* nothing... */
71#define fd_disable_irq() /* nothing... */
72#define fd_cacheflush(addr, size) /* nothing... */
73#define fd_request_irq() sun_fd_request_irq()
74#define fd_free_irq() /* nothing... */
75#if 0 /* P3: added by Alain, these cause a MMU corruption. 19960524 XXX */
76#define fd_dma_mem_alloc(size) ((unsigned long) vmalloc(size))
77#define fd_dma_mem_free(addr,size) (vfree((void *)(addr)))
78#endif 8#endif
79
80/* XXX This isn't really correct. XXX */
81#define get_dma_residue(x) (0)
82
83#define FLOPPY0_TYPE 4
84#define FLOPPY1_TYPE 0
85
86/* Super paranoid... */
87#undef HAVE_DISABLE_HLT
88
89/* Here is where we catch the floppy driver trying to initialize,
90 * therefore this is where we call the PROM device tree probing
91 * routine etc. on the Sparc.
92 */
93#define FDC1 sun_floppy_init()
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/* Routines unique to each controller type on a Sun. */
102static void sun_set_dor(unsigned char value, int fdc_82077)
103{
104 if (sparc_cpu_model == sun4c) {
105 unsigned int bits = 0;
106 if (value & 0x10)
107 bits |= AUXIO_FLPY_DSEL;
108 if ((value & 0x80) == 0)
109 bits |= AUXIO_FLPY_EJCT;
110 set_auxio(bits, (~bits) & (AUXIO_FLPY_DSEL|AUXIO_FLPY_EJCT));
111 }
112 if (fdc_82077) {
113 sun_fdc->dor_82077 = value;
114 }
115}
116
117static unsigned char sun_read_dir(void)
118{
119 if (sparc_cpu_model == sun4c)
120 return (get_auxio() & AUXIO_FLPY_DCHG) ? 0x80 : 0;
121 else
122 return sun_fdc->dir_82077;
123}
124
125static unsigned char sun_82072_fd_inb(int port)
126{
127 udelay(5);
128 switch(port & 7) {
129 default:
130 printk("floppy: Asked to read unknown port %d\n", port);
131 panic("floppy: Port bolixed.");
132 case 4: /* FD_STATUS */
133 return sun_fdc->status_82072 & ~STATUS_DMA;
134 case 5: /* FD_DATA */
135 return sun_fdc->data_82072;
136 case 7: /* FD_DIR */
137 return sun_read_dir();
138 };
139 panic("sun_82072_fd_inb: How did I get here?");
140}
141
142static void sun_82072_fd_outb(unsigned char value, int port)
143{
144 udelay(5);
145 switch(port & 7) {
146 default:
147 printk("floppy: Asked to write to unknown port %d\n", port);
148 panic("floppy: Port bolixed.");
149 case 2: /* FD_DOR */
150 sun_set_dor(value, 0);
151 break;
152 case 5: /* FD_DATA */
153 sun_fdc->data_82072 = value;
154 break;
155 case 7: /* FD_DCR */
156 sun_fdc->dcr_82072 = value;
157 break;
158 case 4: /* FD_STATUS */
159 sun_fdc->status_82072 = value;
160 break;
161 };
162 return;
163}
164
165static unsigned char sun_82077_fd_inb(int port)
166{
167 udelay(5);
168 switch(port & 7) {
169 default:
170 printk("floppy: Asked to read unknown port %d\n", port);
171 panic("floppy: Port bolixed.");
172 case 0: /* FD_STATUS_0 */
173 return sun_fdc->status1_82077;
174 case 1: /* FD_STATUS_1 */
175 return sun_fdc->status2_82077;
176 case 2: /* FD_DOR */
177 return sun_fdc->dor_82077;
178 case 3: /* FD_TDR */
179 return sun_fdc->tapectl_82077;
180 case 4: /* FD_STATUS */
181 return sun_fdc->status_82077 & ~STATUS_DMA;
182 case 5: /* FD_DATA */
183 return sun_fdc->data_82077;
184 case 7: /* FD_DIR */
185 return sun_read_dir();
186 };
187 panic("sun_82077_fd_inb: How did I get here?");
188}
189
190static void sun_82077_fd_outb(unsigned char value, int port)
191{
192 udelay(5);
193 switch(port & 7) {
194 default:
195 printk("floppy: Asked to write to unknown port %d\n", port);
196 panic("floppy: Port bolixed.");
197 case 2: /* FD_DOR */
198 sun_set_dor(value, 1);
199 break;
200 case 5: /* FD_DATA */
201 sun_fdc->data_82077 = value;
202 break;
203 case 7: /* FD_DCR */
204 sun_fdc->dcr_82077 = value;
205 break;
206 case 4: /* FD_STATUS */
207 sun_fdc->status_82077 = value;
208 break;
209 case 3: /* FD_TDR */
210 sun_fdc->tapectl_82077 = value;
211 break;
212 };
213 return;
214}
215
216/* For pseudo-dma (Sun floppy drives have no real DMA available to
217 * them so we must eat the data fifo bytes directly ourselves) we have
218 * three state variables. doing_pdma tells our inline low-level
219 * assembly floppy interrupt entry point whether it should sit and eat
220 * bytes from the fifo or just transfer control up to the higher level
221 * floppy interrupt c-code. I tried very hard but I could not get the
222 * pseudo-dma to work in c-code without getting many overruns and
223 * underruns. If non-zero, doing_pdma encodes the direction of
224 * the transfer for debugging. 1=read 2=write
225 */
226extern char *pdma_vaddr;
227extern unsigned long pdma_size;
228extern volatile int doing_pdma;
229
230/* This is software state */
231extern char *pdma_base;
232extern unsigned long pdma_areasize;
233
234/* Common routines to all controller types on the Sparc. */
235static inline void virtual_dma_init(void)
236{
237 /* nothing... */
238}
239
240static inline void sun_fd_disable_dma(void)
241{
242 doing_pdma = 0;
243 if (pdma_base) {
244 mmu_unlockarea(pdma_base, pdma_areasize);
245 pdma_base = NULL;
246 }
247}
248
249static inline void sun_fd_set_dma_mode(int mode)
250{
251 switch(mode) {
252 case DMA_MODE_READ:
253 doing_pdma = 1;
254 break;
255 case DMA_MODE_WRITE:
256 doing_pdma = 2;
257 break;
258 default:
259 printk("Unknown dma mode %d\n", mode);
260 panic("floppy: Giving up...");
261 }
262}
263
264static inline void sun_fd_set_dma_addr(char *buffer)
265{
266 pdma_vaddr = buffer;
267}
268
269static inline void sun_fd_set_dma_count(int length)
270{
271 pdma_size = length;
272}
273
274static inline void sun_fd_enable_dma(void)
275{
276 pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size);
277 pdma_base = pdma_vaddr;
278 pdma_areasize = pdma_size;
279}
280
281/* Our low-level entry point in arch/sparc/kernel/entry.S */
282extern int sparc_floppy_request_irq(int irq, unsigned long flags,
283 irq_handler_t irq_handler);
284
285static int sun_fd_request_irq(void)
286{
287 static int once = 0;
288 int error;
289
290 if(!once) {
291 once = 1;
292 error = sparc_floppy_request_irq(FLOPPY_IRQ,
293 IRQF_DISABLED,
294 floppy_interrupt);
295 return ((error == 0) ? 0 : -1);
296 } else return 0;
297}
298
299static struct linux_prom_registers fd_regs[2];
300
301static int sun_floppy_init(void)
302{
303 char state[128];
304 int tnode, fd_node, num_regs;
305 struct resource r;
306
307 use_virtual_dma = 1;
308
309 FLOPPY_IRQ = 11;
310 /* Forget it if we aren't on a machine that could possibly
311 * ever have a floppy drive.
312 */
313 if((sparc_cpu_model != sun4c && sparc_cpu_model != sun4m) ||
314 ((idprom->id_machtype == (SM_SUN4C | SM_4C_SLC)) ||
315 (idprom->id_machtype == (SM_SUN4C | SM_4C_ELC)))) {
316 /* We certainly don't have a floppy controller. */
317 goto no_sun_fdc;
318 }
319 /* Well, try to find one. */
320 tnode = prom_getchild(prom_root_node);
321 fd_node = prom_searchsiblings(tnode, "obio");
322 if(fd_node != 0) {
323 tnode = prom_getchild(fd_node);
324 fd_node = prom_searchsiblings(tnode, "SUNW,fdtwo");
325 } else {
326 fd_node = prom_searchsiblings(tnode, "fd");
327 }
328 if(fd_node == 0) {
329 goto no_sun_fdc;
330 }
331
332 /* The sun4m lets us know if the controller is actually usable. */
333 if(sparc_cpu_model == sun4m &&
334 prom_getproperty(fd_node, "status", state, sizeof(state)) != -1) {
335 if(!strcmp(state, "disabled")) {
336 goto no_sun_fdc;
337 }
338 }
339 num_regs = prom_getproperty(fd_node, "reg", (char *) fd_regs, sizeof(fd_regs));
340 num_regs = (num_regs / sizeof(fd_regs[0]));
341 prom_apply_obio_ranges(fd_regs, num_regs);
342 memset(&r, 0, sizeof(r));
343 r.flags = fd_regs[0].which_io;
344 r.start = fd_regs[0].phys_addr;
345 sun_fdc = (struct sun_flpy_controller *)
346 sbus_ioremap(&r, 0, fd_regs[0].reg_size, "floppy");
347
348 /* Last minute sanity check... */
349 if(sun_fdc->status_82072 == 0xff) {
350 sun_fdc = NULL;
351 goto no_sun_fdc;
352 }
353
354 sun_fdops.fd_inb = sun_82077_fd_inb;
355 sun_fdops.fd_outb = sun_82077_fd_outb;
356 fdc_status = &sun_fdc->status_82077;
357
358 if (sun_fdc->dor_82077 == 0x80) {
359 sun_fdc->dor_82077 = 0x02;
360 if (sun_fdc->dor_82077 == 0x80) {
361 sun_fdops.fd_inb = sun_82072_fd_inb;
362 sun_fdops.fd_outb = sun_82072_fd_outb;
363 fdc_status = &sun_fdc->status_82072;
364 }
365 }
366
367 /* Success... */
368 allowed_drive_mask = 0x01;
369 return (int) sun_fdc;
370
371no_sun_fdc:
372 return -1;
373}
374
375static int sparc_eject(void)
376{
377 set_dor(0x00, 0xff, 0x90);
378 udelay(500);
379 set_dor(0x00, 0x6f, 0x00);
380 udelay(500);
381 return 0;
382}
383
384#define fd_eject(drive) sparc_eject()
385
386#define EXTRA_FLOPPY_PARAMS
387
388#endif /* !(__ASM_SPARC_FLOPPY_H) */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-25 14:38:09 -0500