1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
|
/* asm/floppy.h: Sparc specific parts of the Floppy driver.
*
* Copyright (C) 1995 David S. Miller (davem@davemloft.net)
*/
#ifndef __ASM_SPARC_FLOPPY_H
#define __ASM_SPARC_FLOPPY_H
#include <linux/of.h>
#include <linux/of_device.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/idprom.h>
#include <asm/machines.h>
#include <asm/oplib.h>
#include <asm/auxio.h>
#include <asm/irq.h>
/* We don't need no stinkin' I/O port allocation crap. */
#undef release_region
#undef request_region
#define release_region(X, Y) do { } while(0)
#define request_region(X, Y, Z) (1)
/* References:
* 1) Netbsd Sun floppy driver.
* 2) NCR 82077 controller manual
* 3) Intel 82077 controller manual
*/
struct sun_flpy_controller {
volatile unsigned char status_82072; /* Main Status reg. */
#define dcr_82072 status_82072 /* Digital Control reg. */
#define status1_82077 status_82072 /* Auxiliary Status reg. 1 */
volatile unsigned char data_82072; /* Data fifo. */
#define status2_82077 data_82072 /* Auxiliary Status reg. 2 */
volatile unsigned char dor_82077; /* Digital Output reg. */
volatile unsigned char tapectl_82077; /* What the? Tape control reg? */
volatile unsigned char status_82077; /* Main Status Register. */
#define drs_82077 status_82077 /* Digital Rate Select reg. */
volatile unsigned char data_82077; /* Data fifo. */
volatile unsigned char ___unused;
volatile unsigned char dir_82077; /* Digital Input reg. */
#define dcr_82077 dir_82077 /* Config Control reg. */
};
/* You'll only ever find one controller on a SparcStation anyways. */
static struct sun_flpy_controller *sun_fdc = NULL;
extern volatile unsigned char *fdc_status;
struct sun_floppy_ops {
unsigned char (*fd_inb)(int port);
void (*fd_outb)(unsigned char value, int port);
};
static struct sun_floppy_ops sun_fdops;
#define fd_inb(port) sun_fdops.fd_inb(port)
#define fd_outb(value,port) sun_fdops.fd_outb(value,port)
#define fd_enable_dma() sun_fd_enable_dma()
#define fd_disable_dma() sun_fd_disable_dma()
#define fd_request_dma() (0) /* nothing... */
#define fd_free_dma() /* nothing... */
#define fd_clear_dma_ff() /* nothing... */
#define fd_set_dma_mode(mode) sun_fd_set_dma_mode(mode)
#define fd_set_dma_addr(addr) sun_fd_set_dma_addr(addr)
#define fd_set_dma_count(count) sun_fd_set_dma_count(count)
#define fd_enable_irq() /* nothing... */
#define fd_disable_irq() /* nothing... */
#define fd_cacheflush(addr, size) /* nothing... */
#define fd_request_irq() sun_fd_request_irq()
#define fd_free_irq() /* nothing... */
#if 0 /* P3: added by Alain, these cause a MMU corruption. 19960524 XXX */
#define fd_dma_mem_alloc(size) ((unsigned long) vmalloc(size))
#define fd_dma_mem_free(addr,size) (vfree((void *)(addr)))
#endif
/* XXX This isn't really correct. XXX */
#define get_dma_residue(x) (0)
#define FLOPPY0_TYPE 4
#define FLOPPY1_TYPE 0
/* Super paranoid... */
#undef HAVE_DISABLE_HLT
/* Here is where we catch the floppy driver trying to initialize,
* therefore this is where we call the PROM device tree probing
* routine etc. on the Sparc.
*/
#define FDC1 sun_floppy_init()
#define N_FDC 1
#define N_DRIVE 8
/* No 64k boundary crossing problems on the Sparc. */
#define CROSS_64KB(a,s) (0)
/* Routines unique to each controller type on a Sun. */
static void sun_set_dor(unsigned char value, int fdc_82077)
{
if (sparc_cpu_model == sun4c) {
unsigned int bits = 0;
if (value & 0x10)
bits |= AUXIO_FLPY_DSEL;
if ((value & 0x80) == 0)
bits |= AUXIO_FLPY_EJCT;
set_auxio(bits, (~bits) & (AUXIO_FLPY_DSEL|AUXIO_FLPY_EJCT));
}
if (fdc_82077) {
sun_fdc->dor_82077 = value;
}
}
static unsigned char sun_read_dir(void)
{
if (sparc_cpu_model == sun4c)
return (get_auxio() & AUXIO_FLPY_DCHG) ? 0x80 : 0;
else
return sun_fdc->dir_82077;
}
static unsigned char sun_82072_fd_inb(int port)
{
udelay(5);
switch(port & 7) {
default:
printk("floppy: Asked to read unknown port %d\n", port);
panic("floppy: Port bolixed.");
case 4: /* FD_STATUS */
return sun_fdc->status_82072 & ~STATUS_DMA;
case 5: /* FD_DATA */
return sun_fdc->data_82072;
case 7: /* FD_DIR */
return sun_read_dir();
};
panic("sun_82072_fd_inb: How did I get here?");
}
static void sun_82072_fd_outb(unsigned char value, int port)
{
udelay(5);
switch(port & 7) {
default:
printk("floppy: Asked to write to unknown port %d\n", port);
panic("floppy: Port bolixed.");
case 2: /* FD_DOR */
sun_set_dor(value, 0);
break;
case 5: /* FD_DATA */
sun_fdc->data_82072 = value;
break;
case 7: /* FD_DCR */
sun_fdc->dcr_82072 = value;
break;
case 4: /* FD_STATUS */
sun_fdc->status_82072 = value;
break;
};
return;
}
static unsigned char sun_82077_fd_inb(int port)
{
udelay(5);
switch(port & 7) {
default:
printk("floppy: Asked to read unknown port %d\n", port);
panic("floppy: Port bolixed.");
case 0: /* FD_STATUS_0 */
return sun_fdc->status1_82077;
case 1: /* FD_STATUS_1 */
return sun_fdc->status2_82077;
case 2: /* FD_DOR */
return sun_fdc->dor_82077;
case 3: /* FD_TDR */
return sun_fdc->tapectl_82077;
case 4: /* FD_STATUS */
return sun_fdc->status_82077 & ~STATUS_DMA;
case 5: /* FD_DATA */
return sun_fdc->data_82077;
case 7: /* FD_DIR */
return sun_read_dir();
};
panic("sun_82077_fd_inb: How did I get here?");
}
static void sun_82077_fd_outb(unsigned char value, int port)
{
udelay(5);
switch(port & 7) {
default:
printk("floppy: Asked to write to unknown port %d\n", port);
panic("floppy: Port bolixed.");
case 2: /* FD_DOR */
sun_set_dor(value, 1);
break;
case 5: /* FD_DATA */
sun_fdc->data_82077 = value;
break;
case 7: /* FD_DCR */
sun_fdc->dcr_82077 = value;
break;
case 4: /* FD_STATUS */
sun_fdc->status_82077 = value;
break;
case 3: /* FD_TDR */
sun_fdc->tapectl_82077 = value;
break;
};
return;
}
/* For pseudo-dma (Sun floppy drives have no real DMA available to
* them so we must eat the data fifo bytes directly ourselves) we have
* three state variables. doing_pdma tells our inline low-level
* assembly floppy interrupt entry point whether it should sit and eat
* bytes from the fifo or just transfer control up to the higher level
* floppy interrupt c-code. I tried very hard but I could not get the
* pseudo-dma to work in c-code without getting many overruns and
* underruns. If non-zero, doing_pdma encodes the direction of
* the transfer for debugging. 1=read 2=write
*/
extern char *pdma_vaddr;
extern unsigned long pdma_size;
extern volatile int doing_pdma;
/* This is software state */
extern char *pdma_base;
extern unsigned long pdma_areasize;
/* Common routines to all controller types on the Sparc. */
static inline void virtual_dma_init(void)
{
/* nothing... */
}
static inline void sun_fd_disable_dma(void)
{
doing_pdma = 0;
if (pdma_base) {
mmu_unlockarea(pdma_base, pdma_areasize);
pdma_base = NULL;
}
}
static inline void sun_fd_set_dma_mode(int mode)
{
switch(mode) {
case DMA_MODE_READ:
doing_pdma = 1;
break;
case DMA_MODE_WRITE:
doing_pdma = 2;
break;
default:
printk("Unknown dma mode %d\n", mode);
panic("floppy: Giving up...");
}
}
static inline void sun_fd_set_dma_addr(char *buffer)
{
pdma_vaddr = buffer;
}
static inline void sun_fd_set_dma_count(int length)
{
pdma_size = length;
}
static inline void sun_fd_enable_dma(void)
{
pdma_vaddr = mmu_lockarea(pdma_vaddr, pdma_size);
pdma_base = pdma_vaddr;
pdma_areasize = pdma_size;
}
/* Our low-level entry point in arch/sparc/kernel/entry.S */
extern int sparc_floppy_request_irq(int irq, unsigned long flags,
irq_handler_t irq_handler);
static int sun_fd_request_irq(void)
{
static int once = 0;
int error;
if(!once) {
once = 1;
error = sparc_floppy_request_irq(FLOPPY_IRQ,
IRQF_DISABLED,
floppy_interrupt);
return ((error == 0) ? 0 : -1);
} else return 0;
}
static struct linux_prom_registers fd_regs[2];
static int sun_floppy_init(void)
{
char state[128];
int tnode, fd_node, num_regs;
struct resource r;
use_virtual_dma = 1;
FLOPPY_IRQ = 11;
/* Forget it if we aren't on a machine that could possibly
* ever have a floppy drive.
*/
if((sparc_cpu_model != sun4c && sparc_cpu_model != sun4m) ||
((idprom->id_machtype == (SM_SUN4C | SM_4C_SLC)) ||
(idprom->id_machtype == (SM_SUN4C | SM_4C_ELC)))) {
/* We certainly don't have a floppy controller. */
goto no_sun_fdc;
}
/* Well, try to find one. */
tnode
|