1
2#ifndef _M68K_DMA_H
3#define _M68K_DMA_H 1
4
5#ifdef CONFIG_COLDFIRE
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29#include <asm/coldfire.h>
30#include <asm/mcfsim.h>
31#include <asm/mcfdma.h>
32
33
34
35
36#if defined(CONFIG_M5249) || defined(CONFIG_M5307) || defined(CONFIG_M5407) || \
37 defined(CONFIG_M523x) || defined(CONFIG_M527x) || \
38 defined(CONFIG_M528x) || defined(CONFIG_M525x)
39
40#define MAX_M68K_DMA_CHANNELS 4
41#elif defined(CONFIG_M5272)
42#define MAX_M68K_DMA_CHANNELS 1
43#elif defined(CONFIG_M53xx)
44#define MAX_M68K_DMA_CHANNELS 0
45#else
46#define MAX_M68K_DMA_CHANNELS 2
47#endif
48
49extern unsigned int dma_base_addr[MAX_M68K_DMA_CHANNELS];
50extern unsigned int dma_device_address[MAX_M68K_DMA_CHANNELS];
51
52#if !defined(CONFIG_M5272)
53#define DMA_MODE_WRITE_BIT 0x01
54#define DMA_MODE_WORD_BIT 0x02
55#define DMA_MODE_LONG_BIT 0x04
56#define DMA_MODE_SINGLE_BIT 0x08
57
58
59#define DMA_MODE_READ 0
60
61#define DMA_MODE_WRITE 1
62
63#define DMA_MODE_READ_WORD 2
64
65#define DMA_MODE_WRITE_WORD 3
66
67#define DMA_MODE_READ_LONG 4
68
69#define DMA_MODE_WRITE_LONG 5
70
71#define DMA_MODE_READ_SINGLE 8
72
73#define DMA_MODE_WRITE_SINGLE 9
74
75#define DMA_MODE_READ_WORD_SINGLE 10
76
77#define DMA_MODE_WRITE_WORD_SINGLE 11
78
79#define DMA_MODE_READ_LONG_SINGLE 12
80
81#define DMA_MODE_WRITE_LONG_SINGLE 13
82
83#else
84
85
86#define DMA_MODE_SRC_SA_BIT 0x01
87
88#define DMA_MODE_SSIZE_MASK 0x06
89
90#define DMA_MODE_SSIZE_OFF 0x01
91
92#define DMA_MODE_DES_SA_BIT 0x10
93
94#define DMA_MODE_DSIZE_MASK 0x60
95
96#define DMA_MODE_DSIZE_OFF 0x05
97
98#define DMA_MODE_SIZE_LONG 0x00
99#define DMA_MODE_SIZE_BYTE 0x01
100#define DMA_MODE_SIZE_WORD 0x02
101#define DMA_MODE_SIZE_LINE 0x03
102
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109
110#define DMA_MODE_READ ((DMA_MODE_SIZE_BYTE << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_BYTE << DMA_MODE_SSIZE_OFF) | DMA_SRC_SA_BIT)
111
112#define DMA_MODE_WRITE ((DMA_MODE_SIZE_BYTE << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_BYTE << DMA_MODE_SSIZE_OFF) | DMA_DES_SA_BIT)
113
114#define DMA_MODE_READ_WORD ((DMA_MODE_SIZE_WORD << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_WORD << DMA_MODE_SSIZE_OFF) | DMA_SRC_SA_BIT)
115
116#define DMA_MODE_WRITE_WORD ((DMA_MODE_SIZE_WORD << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_WORD << DMA_MODE_SSIZE_OFF) | DMA_DES_SA_BIT)
117
118#define DMA_MODE_READ_LONG ((DMA_MODE_SIZE_LONG << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_LONG << DMA_MODE_SSIZE_OFF) | DMA_SRC_SA_BIT)
119
120#define DMA_MODE_WRITE_LONG ((DMA_MODE_SIZE_LONG << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_LONG << DMA_MODE_SSIZE_OFF) | DMA_DES_SA_BIT)
121
122#endif
123
124#if !defined(CONFIG_M5272)
125
126static __inline__ void enable_dma(unsigned int dmanr)
127{
128 volatile unsigned short *dmawp;
129
130#ifdef DMA_DEBUG
131 printk("enable_dma(dmanr=%d)\n", dmanr);
132#endif
133
134 dmawp = (unsigned short *) dma_base_addr[dmanr];
135 dmawp[MCFDMA_DCR] |= MCFDMA_DCR_EEXT;
136}
137
138static __inline__ void disable_dma(unsigned int dmanr)
139{
140 volatile unsigned short *dmawp;
141 volatile unsigned char *dmapb;
142
143#ifdef DMA_DEBUG
144 printk("disable_dma(dmanr=%d)\n", dmanr);
145#endif
146
147 dmawp = (unsigned short *) dma_base_addr[dmanr];
148 dmapb = (unsigned char *) dma_base_addr[dmanr];
149
150
151 dmawp[MCFDMA_DCR] &= ~MCFDMA_DCR_EEXT;
152 dmapb[MCFDMA_DSR] = MCFDMA_DSR_DONE;
153}
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164
165static __inline__ void clear_dma_ff(unsigned int dmanr)
166{
167}
168
169
170static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
171{
172
173 volatile unsigned char *dmabp;
174 volatile unsigned short *dmawp;
175
176#ifdef DMA_DEBUG
177 printk("set_dma_mode(dmanr=%d,mode=%d)\n", dmanr, mode);
178#endif
179
180 dmabp = (unsigned char *) dma_base_addr[dmanr];
181 dmawp = (unsigned short *) dma_base_addr[dmanr];
182
183
184 dmabp[MCFDMA_DSR] = MCFDMA_DSR_DONE;
185
186
187 dmawp[MCFDMA_DCR] =
188 MCFDMA_DCR_INT |
189 MCFDMA_DCR_CS |
190 MCFDMA_DCR_AA |
191
192 ((mode & DMA_MODE_SINGLE_BIT) ? MCFDMA_DCR_SAA : 0) |
193
194 ((mode & DMA_MODE_WRITE_BIT) ? MCFDMA_DCR_S_RW : 0) |
195
196 ((mode & DMA_MODE_WRITE_BIT) ? MCFDMA_DCR_SINC : MCFDMA_DCR_DINC) |
197
198 ((mode & DMA_MODE_WORD_BIT) ? MCFDMA_DCR_SSIZE_WORD :
199 ((mode & DMA_MODE_LONG_BIT) ? MCFDMA_DCR_SSIZE_LONG :
200 MCFDMA_DCR_SSIZE_BYTE)) |
201 ((mode & DMA_MODE_WORD_BIT) ? MCFDMA_DCR_DSIZE_WORD :
202 ((mode & DMA_MODE_LONG_BIT) ? MCFDMA_DCR_DSIZE_LONG :
203 MCFDMA_DCR_DSIZE_BYTE));
204
205#ifdef DEBUG_DMA
206 printk("%s(%d): dmanr=%d DSR[%x]=%x DCR[%x]=%x\n", __FILE__, __LINE__,
207 dmanr, (int) &dmabp[MCFDMA_DSR], dmabp[MCFDMA_DSR],
208 (int) &dmawp[MCFDMA_DCR], dmawp[MCFDMA_DCR]);
209#endif
210}
211
212
213static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int a)
214{
215 volatile unsigned short *dmawp;
216 volatile unsigned int *dmalp;
217
218#ifdef DMA_DEBUG
219 printk("set_dma_addr(dmanr=%d,a=%x)\n", dmanr, a);
220#endif
221
222 dmawp = (unsigned short *) dma_base_addr[dmanr];
223 dmalp = (unsigned int *) dma_base_addr[dmanr];
224
225
226 if (dmawp[MCFDMA_DCR] & MCFDMA_DCR_SINC) {
227
228 dmalp[MCFDMA_SAR] = a;
229
230 dmalp[MCFDMA_DAR] = dma_device_address[dmanr];
231 } else {
232
233 dmalp[MCFDMA_DAR] = a;
234
235 dmalp[MCFDMA_SAR] = dma_device_address[dmanr];
236 }
237
238#ifdef DEBUG_DMA
239 printk("%s(%d): dmanr=%d DCR[%x]=%x SAR[%x]=%08x DAR[%x]=%08x\n",
240 __FILE__, __LINE__, dmanr, (int) &dmawp[MCFDMA_DCR], dmawp[MCFDMA_DCR],
241 (int) &dmalp[MCFDMA_SAR], dmalp[MCFDMA_SAR],
242 (int) &dmalp[MCFDMA_DAR], dmalp[MCFDMA_DAR]);
243#endif
244}
245
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249
250static __inline__ void set_dma_device_addr(unsigned int dmanr, unsigned int a)
251{
252#ifdef DMA_DEBUG
253 printk("set_dma_device_addr(dmanr=%d,a=%x)\n", dmanr, a);
254#endif
255
256 dma_device_address[dmanr] = a;
257}
258
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261
262static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
263{
264 volatile unsigned short *dmawp;
265
266#ifdef DMA_DEBUG
267 printk("set_dma_count(dmanr=%d,count=%d)\n", dmanr, count);
268#endif
269
270 dmawp = (unsigned short *) dma_base_addr[dmanr];
271 dmawp[MCFDMA_BCR] = (unsigned short)count;
272}
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280static __inline__ int get_dma_residue(unsigned int dmanr)
281{
282 volatile unsigned short *dmawp;
283 unsigned short count;
284
285#ifdef DMA_DEBUG
286 printk("get_dma_residue(dmanr=%d)\n", dmanr);
287#endif
288
289 dmawp = (unsigned short *) dma_base_addr[dmanr];
290 count = dmawp[MCFDMA_BCR];
291 return((int) count);
292}
293#else
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319static __inline__ void enable_dma(unsigned int dmanr)
320{
321 volatile unsigned int *dmalp;
322
323#ifdef DMA_DEBUG
324 printk("enable_dma(dmanr=%d)\n", dmanr);
325#endif
326
327 dmalp = (unsigned int *) dma_base_addr[dmanr];
328 dmalp[MCFDMA_DMR] |= MCFDMA_DMR_EN;
329}
330
331static __inline__ void disable_dma(unsigned int dmanr)
332{
333 volatile unsigned int *dmalp;
334
335#ifdef DMA_DEBUG
336 printk("disable_dma(dmanr=%d)\n", dmanr);
337#endif
338
339 dmalp = (unsigned int *) dma_base_addr[dmanr];
340
341
342 dmalp[MCFDMA_DMR] &= ~MCFDMA_DMR_EN;
343 dmalp[MCFDMA_DMR] |= MCFDMA_DMR_RESET;
344}
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355
356static __inline__ void clear_dma_ff(unsigned int dmanr)
357{
358}
359
360
361static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
362{
363
364 volatile unsigned int *dmalp;
365 volatile unsigned short *dmawp;
366
367#ifdef DMA_DEBUG
368 printk("set_dma_mode(dmanr=%d,mode=%d)\n", dmanr, mode);
369#endif
370 dmalp = (unsigned int *) dma_base_addr[dmanr];
371 dmawp = (unsigned short *) dma_base_addr[dmanr];
372
373
374 dmalp[MCFDMA_DMR] |= MCFDMA_DMR_RESET;
375
376
377 dmalp[MCFDMA_DMR] =
378 MCFDMA_DMR_RQM_DUAL |
379 MCFDMA_DMR_DSTT_SD |
380 MCFDMA_DMR_SRCT_SD |
381
382 ((mode & DMA_MODE_SRC_SA_BIT) ? MCFDMA_DMR_SRCM_SA : MCFDMA_DMR_SRCM_IA) |
383
384 ((mode & DMA_MODE_DES_SA_BIT) ? MCFDMA_DMR_DSTM_SA : MCFDMA_DMR_DSTM_IA) |
385
386 (((mode & DMA_MODE_SSIZE_MASK) >> DMA_MODE_SSIZE_OFF) << MCFDMA_DMR_DSTS_OFF) |
387 (((mode & DMA_MODE_SSIZE_MASK) >> DMA_MODE_SSIZE_OFF) << MCFDMA_DMR_SRCS_OFF);
388
389 dmawp[MCFDMA_DIR] |= MCFDMA_DIR_ASCEN;
390
391#ifdef DEBUG_DMA
392 printk("%s(%d): dmanr=%d DMR[%x]=%x DIR[%x]=%x\n", __FILE__, __LINE__,
393 dmanr, (int) &dmalp[MCFDMA_DMR], dmalp[MCFDMA_DMR],
394 (int) &dmawp[MCFDMA_DIR], dmawp[MCFDMA_DIR]);
395#endif
396}
397
398
399static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int a)
400{
401 volatile unsigned int *dmalp;
402
403#ifdef DMA_DEBUG
404 printk("set_dma_addr(dmanr=%d,a=%x)\n", dmanr, a);
405#endif
406
407 dmalp = (unsigned int *) dma_base_addr[dmanr];
408
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410 if (dmalp[MCFDMA_DMR] & MCFDMA_DMR_SRCM) {
411
412 dmalp[MCFDMA_DSAR] = a;
413
414 dmalp[MCFDMA_DDAR] = dma_device_address[dmanr];
415 } else {
416
417 dmalp[MCFDMA_DDAR] = a;
418
419 dmalp[MCFDMA_DSAR] = dma_device_address[dmanr];
420 }
421
422#ifdef DEBUG_DMA
423 printk("%s(%d): dmanr=%d DMR[%x]=%x SAR[%x]=%08x DAR[%x]=%08x\n",
424 __FILE__, __LINE__, dmanr, (int) &dmalp[MCFDMA_DMR], dmalp[MCFDMA_DMR],
425 (int) &dmalp[MCFDMA_DSAR], dmalp[MCFDMA_DSAR],
426 (int) &dmalp[MCFDMA_DDAR], dmalp[MCFDMA_DDAR]);
427#endif
428}
429
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434static __inline__ void set_dma_device_addr(unsigned int dmanr, unsigned int a)
435{
436#ifdef DMA_DEBUG
437 printk("set_dma_device_addr(dmanr=%d,a=%x)\n", dmanr, a);
438#endif
439
440 dma_device_address[dmanr] = a;
441}
442
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447
448static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
449{
450 volatile unsigned int *dmalp;
451
452#ifdef DMA_DEBUG
453 printk("set_dma_count(dmanr=%d,count=%d)\n", dmanr, count);
454#endif
455
456 dmalp = (unsigned int *) dma_base_addr[dmanr];
457 dmalp[MCFDMA_DBCR] = count;
458}
459
460
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463
464
465
466static __inline__ int get_dma_residue(unsigned int dmanr)
467{
468 volatile unsigned int *dmalp;
469 unsigned int count;
470
471#ifdef DMA_DEBUG
472 printk("get_dma_residue(dmanr=%d)\n", dmanr);
473#endif
474
475 dmalp = (unsigned int *) dma_base_addr[dmanr];
476 count = dmalp[MCFDMA_DBCR];
477 return(count);
478}
479
480#endif
481#endif
482
483
484
485#define MAX_DMA_ADDRESS PAGE_OFFSET
486
487#define MAX_DMA_CHANNELS 8
488
489extern int request_dma(unsigned int dmanr, const char * device_id);
490extern void free_dma(unsigned int dmanr);
491
492#ifdef CONFIG_PCI
493extern int isa_dma_bridge_buggy;
494#else
495#define isa_dma_bridge_buggy (0)
496#endif
497
498#endif
499