Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/sound/oss/dmasound/dmasound_paula.c | |
3 | * | |
4 | * Amiga `Paula' DMA Sound Driver | |
5 | * | |
6 | * See linux/sound/oss/dmasound/dmasound_core.c for copyright and credits | |
7 | * prior to 28/01/2001 | |
8 | * | |
9 | * 28/01/2001 [0.1] Iain Sandoe | |
10 | * - added versioning | |
11 | * - put in and populated the hardware_afmts field. | |
12 | * [0.2] - put in SNDCTL_DSP_GETCAPS value. | |
13 | * [0.3] - put in constraint on state buffer usage. | |
14 | * [0.4] - put in default hard/soft settings | |
15 | */ | |
16 | ||
17 | ||
18 | #include <linux/module.h> | |
1da177e4 LT |
19 | #include <linux/mm.h> |
20 | #include <linux/init.h> | |
21 | #include <linux/ioport.h> | |
22 | #include <linux/soundcard.h> | |
23 | #include <linux/interrupt.h> | |
24 | ||
25 | #include <asm/uaccess.h> | |
26 | #include <asm/setup.h> | |
27 | #include <asm/amigahw.h> | |
28 | #include <asm/amigaints.h> | |
29 | #include <asm/machdep.h> | |
30 | ||
31 | #include "dmasound.h" | |
32 | ||
33 | #define DMASOUND_PAULA_REVISION 0 | |
34 | #define DMASOUND_PAULA_EDITION 4 | |
35 | ||
b4290a23 | 36 | #define custom amiga_custom |
1da177e4 LT |
37 | /* |
38 | * The minimum period for audio depends on htotal (for OCS/ECS/AGA) | |
39 | * (Imported from arch/m68k/amiga/amisound.c) | |
40 | */ | |
41 | ||
42 | extern volatile u_short amiga_audio_min_period; | |
43 | ||
44 | ||
45 | /* | |
46 | * amiga_mksound() should be able to restore the period after beeping | |
47 | * (Imported from arch/m68k/amiga/amisound.c) | |
48 | */ | |
49 | ||
50 | extern u_short amiga_audio_period; | |
51 | ||
52 | ||
53 | /* | |
54 | * Audio DMA masks | |
55 | */ | |
56 | ||
57 | #define AMI_AUDIO_OFF (DMAF_AUD0 | DMAF_AUD1 | DMAF_AUD2 | DMAF_AUD3) | |
58 | #define AMI_AUDIO_8 (DMAF_SETCLR | DMAF_MASTER | DMAF_AUD0 | DMAF_AUD1) | |
59 | #define AMI_AUDIO_14 (AMI_AUDIO_8 | DMAF_AUD2 | DMAF_AUD3) | |
60 | ||
61 | ||
62 | /* | |
63 | * Helper pointers for 16(14)-bit sound | |
64 | */ | |
65 | ||
66 | static int write_sq_block_size_half, write_sq_block_size_quarter; | |
67 | ||
68 | ||
69 | /*** Low level stuff *********************************************************/ | |
70 | ||
71 | ||
1ef64e67 | 72 | static void *AmiAlloc(unsigned int size, gfp_t flags); |
1da177e4 LT |
73 | static void AmiFree(void *obj, unsigned int size); |
74 | static int AmiIrqInit(void); | |
75 | #ifdef MODULE | |
76 | static void AmiIrqCleanUp(void); | |
77 | #endif | |
78 | static void AmiSilence(void); | |
79 | static void AmiInit(void); | |
80 | static int AmiSetFormat(int format); | |
81 | static int AmiSetVolume(int volume); | |
82 | static int AmiSetTreble(int treble); | |
83 | static void AmiPlayNextFrame(int index); | |
84 | static void AmiPlay(void); | |
7d12e780 | 85 | static irqreturn_t AmiInterrupt(int irq, void *dummy); |
1da177e4 LT |
86 | |
87 | #ifdef CONFIG_HEARTBEAT | |
88 | ||
89 | /* | |
90 | * Heartbeat interferes with sound since the 7 kHz low-pass filter and the | |
91 | * power LED are controlled by the same line. | |
92 | */ | |
93 | ||
1da177e4 LT |
94 | static void (*saved_heartbeat)(int) = NULL; |
95 | ||
96 | static inline void disable_heartbeat(void) | |
97 | { | |
98 | if (mach_heartbeat) { | |
99 | saved_heartbeat = mach_heartbeat; | |
100 | mach_heartbeat = NULL; | |
101 | } | |
102 | AmiSetTreble(dmasound.treble); | |
103 | } | |
104 | ||
105 | static inline void enable_heartbeat(void) | |
106 | { | |
107 | if (saved_heartbeat) | |
108 | mach_heartbeat = saved_heartbeat; | |
109 | } | |
110 | #else /* !CONFIG_HEARTBEAT */ | |
111 | #define disable_heartbeat() do { } while (0) | |
112 | #define enable_heartbeat() do { } while (0) | |
113 | #endif /* !CONFIG_HEARTBEAT */ | |
114 | ||
115 | ||
116 | /*** Mid level stuff *********************************************************/ | |
117 | ||
118 | static void AmiMixerInit(void); | |
119 | static int AmiMixerIoctl(u_int cmd, u_long arg); | |
120 | static int AmiWriteSqSetup(void); | |
121 | static int AmiStateInfo(char *buffer, size_t space); | |
122 | ||
123 | ||
124 | /*** Translations ************************************************************/ | |
125 | ||
126 | /* ++TeSche: radically changed for new expanding purposes... | |
127 | * | |
128 | * These two routines now deal with copying/expanding/translating the samples | |
129 | * from user space into our buffer at the right frequency. They take care about | |
130 | * how much data there's actually to read, how much buffer space there is and | |
131 | * to convert samples into the right frequency/encoding. They will only work on | |
132 | * complete samples so it may happen they leave some bytes in the input stream | |
133 | * if the user didn't write a multiple of the current sample size. They both | |
134 | * return the number of bytes they've used from both streams so you may detect | |
135 | * such a situation. Luckily all programs should be able to cope with that. | |
136 | * | |
137 | * I think I've optimized anything as far as one can do in plain C, all | |
138 | * variables should fit in registers and the loops are really short. There's | |
139 | * one loop for every possible situation. Writing a more generalized and thus | |
140 | * parameterized loop would only produce slower code. Feel free to optimize | |
141 | * this in assembler if you like. :) | |
142 | * | |
143 | * I think these routines belong here because they're not yet really hardware | |
144 | * independent, especially the fact that the Falcon can play 16bit samples | |
145 | * only in stereo is hardcoded in both of them! | |
146 | * | |
147 | * ++geert: split in even more functions (one per format) | |
148 | */ | |
149 | ||
150 | ||
151 | /* | |
152 | * Native format | |
153 | */ | |
154 | ||
031eb4cd | 155 | static ssize_t ami_ct_s8(const u_char __user *userPtr, size_t userCount, |
1da177e4 LT |
156 | u_char frame[], ssize_t *frameUsed, ssize_t frameLeft) |
157 | { | |
158 | ssize_t count, used; | |
159 | ||
160 | if (!dmasound.soft.stereo) { | |
161 | void *p = &frame[*frameUsed]; | |
162 | count = min_t(unsigned long, userCount, frameLeft) & ~1; | |
163 | used = count; | |
164 | if (copy_from_user(p, userPtr, count)) | |
165 | return -EFAULT; | |
166 | } else { | |
167 | u_char *left = &frame[*frameUsed>>1]; | |
168 | u_char *right = left+write_sq_block_size_half; | |
169 | count = min_t(unsigned long, userCount, frameLeft)>>1 & ~1; | |
170 | used = count*2; | |
171 | while (count > 0) { | |
172 | if (get_user(*left++, userPtr++) | |
173 | || get_user(*right++, userPtr++)) | |
174 | return -EFAULT; | |
175 | count--; | |
176 | } | |
177 | } | |
178 | *frameUsed += used; | |
179 | return used; | |
180 | } | |
181 | ||
182 | ||
183 | /* | |
184 | * Copy and convert 8 bit data | |
185 | */ | |
186 | ||
187 | #define GENERATE_AMI_CT8(funcname, convsample) \ | |
031eb4cd | 188 | static ssize_t funcname(const u_char __user *userPtr, size_t userCount, \ |
1da177e4 LT |
189 | u_char frame[], ssize_t *frameUsed, \ |
190 | ssize_t frameLeft) \ | |
191 | { \ | |
192 | ssize_t count, used; \ | |
193 | \ | |
194 | if (!dmasound.soft.stereo) { \ | |
195 | u_char *p = &frame[*frameUsed]; \ | |
196 | count = min_t(size_t, userCount, frameLeft) & ~1; \ | |
197 | used = count; \ | |
198 | while (count > 0) { \ | |
199 | u_char data; \ | |
200 | if (get_user(data, userPtr++)) \ | |
201 | return -EFAULT; \ | |
202 | *p++ = convsample(data); \ | |
203 | count--; \ | |
204 | } \ | |
205 | } else { \ | |
206 | u_char *left = &frame[*frameUsed>>1]; \ | |
207 | u_char *right = left+write_sq_block_size_half; \ | |
208 | count = min_t(size_t, userCount, frameLeft)>>1 & ~1; \ | |
209 | used = count*2; \ | |
210 | while (count > 0) { \ | |
211 | u_char data; \ | |
212 | if (get_user(data, userPtr++)) \ | |
213 | return -EFAULT; \ | |
214 | *left++ = convsample(data); \ | |
215 | if (get_user(data, userPtr++)) \ | |
216 | return -EFAULT; \ | |
217 | *right++ = convsample(data); \ | |
218 | count--; \ | |
219 | } \ | |
220 | } \ | |
221 | *frameUsed += used; \ | |
222 | return used; \ | |
223 | } | |
224 | ||
225 | #define AMI_CT_ULAW(x) (dmasound_ulaw2dma8[(x)]) | |
226 | #define AMI_CT_ALAW(x) (dmasound_alaw2dma8[(x)]) | |
227 | #define AMI_CT_U8(x) ((x) ^ 0x80) | |
228 | ||
229 | GENERATE_AMI_CT8(ami_ct_ulaw, AMI_CT_ULAW) | |
230 | GENERATE_AMI_CT8(ami_ct_alaw, AMI_CT_ALAW) | |
231 | GENERATE_AMI_CT8(ami_ct_u8, AMI_CT_U8) | |
232 | ||
233 | ||
234 | /* | |
235 | * Copy and convert 16 bit data | |
236 | */ | |
237 | ||
238 | #define GENERATE_AMI_CT_16(funcname, convsample) \ | |
031eb4cd | 239 | static ssize_t funcname(const u_char __user *userPtr, size_t userCount, \ |
1da177e4 LT |
240 | u_char frame[], ssize_t *frameUsed, \ |
241 | ssize_t frameLeft) \ | |
242 | { \ | |
031eb4cd | 243 | const u_short __user *ptr = (const u_short __user *)userPtr; \ |
1da177e4 LT |
244 | ssize_t count, used; \ |
245 | u_short data; \ | |
246 | \ | |
247 | if (!dmasound.soft.stereo) { \ | |
248 | u_char *high = &frame[*frameUsed>>1]; \ | |
249 | u_char *low = high+write_sq_block_size_half; \ | |
250 | count = min_t(size_t, userCount, frameLeft)>>1 & ~1; \ | |
251 | used = count*2; \ | |
252 | while (count > 0) { \ | |
815f597b | 253 | if (get_user(data, ptr++)) \ |
1da177e4 LT |
254 | return -EFAULT; \ |
255 | data = convsample(data); \ | |
256 | *high++ = data>>8; \ | |
257 | *low++ = (data>>2) & 0x3f; \ | |
258 | count--; \ | |
259 | } \ | |
260 | } else { \ | |
261 | u_char *lefth = &frame[*frameUsed>>2]; \ | |
262 | u_char *leftl = lefth+write_sq_block_size_quarter; \ | |
263 | u_char *righth = lefth+write_sq_block_size_half; \ | |
264 | u_char *rightl = righth+write_sq_block_size_quarter; \ | |
265 | count = min_t(size_t, userCount, frameLeft)>>2 & ~1; \ | |
266 | used = count*4; \ | |
267 | while (count > 0) { \ | |
815f597b | 268 | if (get_user(data, ptr++)) \ |
1da177e4 LT |
269 | return -EFAULT; \ |
270 | data = convsample(data); \ | |
271 | *lefth++ = data>>8; \ | |
272 | *leftl++ = (data>>2) & 0x3f; \ | |
815f597b | 273 | if (get_user(data, ptr++)) \ |
1da177e4 LT |
274 | return -EFAULT; \ |
275 | data = convsample(data); \ | |
276 | *righth++ = data>>8; \ | |
277 | *rightl++ = (data>>2) & 0x3f; \ | |
278 | count--; \ | |
279 | } \ | |
280 | } \ | |
281 | *frameUsed += used; \ | |
282 | return used; \ | |
283 | } | |
284 | ||
285 | #define AMI_CT_S16BE(x) (x) | |
286 | #define AMI_CT_U16BE(x) ((x) ^ 0x8000) | |
287 | #define AMI_CT_S16LE(x) (le2be16((x))) | |
288 | #define AMI_CT_U16LE(x) (le2be16((x)) ^ 0x8000) | |
289 | ||
290 | GENERATE_AMI_CT_16(ami_ct_s16be, AMI_CT_S16BE) | |
291 | GENERATE_AMI_CT_16(ami_ct_u16be, AMI_CT_U16BE) | |
292 | GENERATE_AMI_CT_16(ami_ct_s16le, AMI_CT_S16LE) | |
293 | GENERATE_AMI_CT_16(ami_ct_u16le, AMI_CT_U16LE) | |
294 | ||
295 | ||
296 | static TRANS transAmiga = { | |
297 | .ct_ulaw = ami_ct_ulaw, | |
298 | .ct_alaw = ami_ct_alaw, | |
299 | .ct_s8 = ami_ct_s8, | |
300 | .ct_u8 = ami_ct_u8, | |
301 | .ct_s16be = ami_ct_s16be, | |
302 | .ct_u16be = ami_ct_u16be, | |
303 | .ct_s16le = ami_ct_s16le, | |
304 | .ct_u16le = ami_ct_u16le, | |
305 | }; | |
306 | ||
307 | /*** Low level stuff *********************************************************/ | |
308 | ||
309 | static inline void StopDMA(void) | |
310 | { | |
311 | custom.aud[0].audvol = custom.aud[1].audvol = 0; | |
312 | custom.aud[2].audvol = custom.aud[3].audvol = 0; | |
313 | custom.dmacon = AMI_AUDIO_OFF; | |
314 | enable_heartbeat(); | |
315 | } | |
316 | ||
1ef64e67 | 317 | static void *AmiAlloc(unsigned int size, gfp_t flags) |
1da177e4 LT |
318 | { |
319 | return amiga_chip_alloc((long)size, "dmasound [Paula]"); | |
320 | } | |
321 | ||
322 | static void AmiFree(void *obj, unsigned int size) | |
323 | { | |
324 | amiga_chip_free (obj); | |
325 | } | |
326 | ||
327 | static int __init AmiIrqInit(void) | |
328 | { | |
329 | /* turn off DMA for audio channels */ | |
330 | StopDMA(); | |
331 | ||
332 | /* Register interrupt handler. */ | |
333 | if (request_irq(IRQ_AMIGA_AUD0, AmiInterrupt, 0, "DMA sound", | |
334 | AmiInterrupt)) | |
335 | return 0; | |
336 | return 1; | |
337 | } | |
338 | ||
339 | #ifdef MODULE | |
340 | static void AmiIrqCleanUp(void) | |
341 | { | |
342 | /* turn off DMA for audio channels */ | |
343 | StopDMA(); | |
344 | /* release the interrupt */ | |
345 | free_irq(IRQ_AMIGA_AUD0, AmiInterrupt); | |
346 | } | |
347 | #endif /* MODULE */ | |
348 | ||
349 | static void AmiSilence(void) | |
350 | { | |
351 | /* turn off DMA for audio channels */ | |
352 | StopDMA(); | |
353 | } | |
354 | ||
355 | ||
356 | static void AmiInit(void) | |
357 | { | |
358 | int period, i; | |
359 | ||
360 | AmiSilence(); | |
361 | ||
362 | if (dmasound.soft.speed) | |
363 | period = amiga_colorclock/dmasound.soft.speed-1; | |
364 | else | |
365 | period = amiga_audio_min_period; | |
366 | dmasound.hard = dmasound.soft; | |
367 | dmasound.trans_write = &transAmiga; | |
368 | ||
369 | if (period < amiga_audio_min_period) { | |
370 | /* we would need to squeeze the sound, but we won't do that */ | |
371 | period = amiga_audio_min_period; | |
372 | } else if (period > 65535) { | |
373 | period = 65535; | |
374 | } | |
375 | dmasound.hard.speed = amiga_colorclock/(period+1); | |
376 | ||
377 | for (i = 0; i < 4; i++) | |
378 | custom.aud[i].audper = period; | |
379 | amiga_audio_period = period; | |
380 | } | |
381 | ||
382 | ||
383 | static int AmiSetFormat(int format) | |
384 | { | |
385 | int size; | |
386 | ||
387 | /* Amiga sound DMA supports 8bit and 16bit (pseudo 14 bit) modes */ | |
388 | ||
389 | switch (format) { | |
390 | case AFMT_QUERY: | |
391 | return dmasound.soft.format; | |
392 | case AFMT_MU_LAW: | |
393 | case AFMT_A_LAW: | |
394 | case AFMT_U8: | |
395 | case AFMT_S8: | |
396 | size = 8; | |
397 | break; | |
398 | case AFMT_S16_BE: | |
399 | case AFMT_U16_BE: | |
400 | case AFMT_S16_LE: | |
401 | case AFMT_U16_LE: | |
402 | size = 16; | |
403 | break; | |
404 | default: /* :-) */ | |
405 | size = 8; | |
406 | format = AFMT_S8; | |
407 | } | |
408 | ||
409 | dmasound.soft.format = format; | |
410 | dmasound.soft.size = size; | |
411 | if (dmasound.minDev == SND_DEV_DSP) { | |
412 | dmasound.dsp.format = format; | |
413 | dmasound.dsp.size = dmasound.soft.size; | |
414 | } | |
415 | AmiInit(); | |
416 | ||
417 | return format; | |
418 | } | |
419 | ||
420 | ||
421 | #define VOLUME_VOXWARE_TO_AMI(v) \ | |
422 | (((v) < 0) ? 0 : ((v) > 100) ? 64 : ((v) * 64)/100) | |
423 | #define VOLUME_AMI_TO_VOXWARE(v) ((v)*100/64) | |
424 | ||
425 | static int AmiSetVolume(int volume) | |
426 | { | |
427 | dmasound.volume_left = VOLUME_VOXWARE_TO_AMI(volume & 0xff); | |
428 | custom.aud[0].audvol = dmasound.volume_left; | |
429 | dmasound.volume_right = VOLUME_VOXWARE_TO_AMI((volume & 0xff00) >> 8); | |
430 | custom.aud[1].audvol = dmasound.volume_right; | |
431 | if (dmasound.hard.size == 16) { | |
432 | if (dmasound.volume_left == 64 && dmasound.volume_right == 64) { | |
433 | custom.aud[2].audvol = 1; | |
434 | custom.aud[3].audvol = 1; | |
435 | } else { | |
436 | custom.aud[2].audvol = 0; | |
437 | custom.aud[3].audvol = 0; | |
438 | } | |
439 | } | |
440 | return VOLUME_AMI_TO_VOXWARE(dmasound.volume_left) | | |
441 | (VOLUME_AMI_TO_VOXWARE(dmasound.volume_right) << 8); | |
442 | } | |
443 | ||
444 | static int AmiSetTreble(int treble) | |
445 | { | |
446 | dmasound.treble = treble; | |
447 | if (treble < 50) | |
448 | ciaa.pra &= ~0x02; | |
449 | else | |
450 | ciaa.pra |= 0x02; | |
451 | return treble; | |
452 | } | |
453 | ||
454 | ||
455 | #define AMI_PLAY_LOADED 1 | |
456 | #define AMI_PLAY_PLAYING 2 | |
457 | #define AMI_PLAY_MASK 3 | |
458 | ||
459 | ||
460 | static void AmiPlayNextFrame(int index) | |
461 | { | |
462 | u_char *start, *ch0, *ch1, *ch2, *ch3; | |
463 | u_long size; | |
464 | ||
465 | /* used by AmiPlay() if all doubts whether there really is something | |
466 | * to be played are already wiped out. | |
467 | */ | |
468 | start = write_sq.buffers[write_sq.front]; | |
469 | size = (write_sq.count == index ? write_sq.rear_size | |
470 | : write_sq.block_size)>>1; | |
471 | ||
472 | if (dmasound.hard.stereo) { | |
473 | ch0 = start; | |
474 | ch1 = start+write_sq_block_size_half; | |
475 | size >>= 1; | |
476 | } else { | |
477 | ch0 = start; | |
478 | ch1 = start; | |
479 | } | |
480 | ||
481 | disable_heartbeat(); | |
482 | custom.aud[0].audvol = dmasound.volume_left; | |
483 | custom.aud[1].audvol = dmasound.volume_right; | |
484 | if (dmasound.hard.size == 8) { | |
485 | custom.aud[0].audlc = (u_short *)ZTWO_PADDR(ch0); | |
486 | custom.aud[0].audlen = size; | |
487 | custom.aud[1].audlc = (u_short *)ZTWO_PADDR(ch1); | |
488 | custom.aud[1].audlen = size; | |
489 | custom.dmacon = AMI_AUDIO_8; | |
490 | } else { | |
491 | size >>= 1; | |
492 | custom.aud[0].audlc = (u_short *)ZTWO_PADDR(ch0); | |
493 | custom.aud[0].audlen = size; | |
494 | custom.aud[1].audlc = (u_short *)ZTWO_PADDR(ch1); | |
495 | custom.aud[1].audlen = size; | |
496 | if (dmasound.volume_left == 64 && dmasound.volume_right == 64) { | |
497 | /* We can play pseudo 14-bit only with the maximum volume */ | |
498 | ch3 = ch0+write_sq_block_size_quarter; | |
499 | ch2 = ch1+write_sq_block_size_quarter; | |
500 | custom.aud[2].audvol = 1; /* we are being affected by the beeps */ | |
501 | custom.aud[3].audvol = 1; /* restoring volume here helps a bit */ | |
502 | custom.aud[2].audlc = (u_short *)ZTWO_PADDR(ch2); | |
503 | custom.aud[2].audlen = size; | |
504 | custom.aud[3].audlc = (u_short *)ZTWO_PADDR(ch3); | |
505 | custom.aud[3].audlen = size; | |
506 | custom.dmacon = AMI_AUDIO_14; | |
507 | } else { | |
508 | custom.aud[2].audvol = 0; | |
509 | custom.aud[3].audvol = 0; | |
510 | custom.dmacon = AMI_AUDIO_8; | |
511 | } | |
512 | } | |
513 | write_sq.front = (write_sq.front+1) % write_sq.max_count; | |
514 | write_sq.active |= AMI_PLAY_LOADED; | |
515 | } | |
516 | ||
517 | ||
518 | static void AmiPlay(void) | |
519 | { | |
520 | int minframes = 1; | |
521 | ||
522 | custom.intena = IF_AUD0; | |
523 | ||
524 | if (write_sq.active & AMI_PLAY_LOADED) { | |
525 | /* There's already a frame loaded */ | |
526 | custom.intena = IF_SETCLR | IF_AUD0; | |
527 | return; | |
528 | } | |
529 | ||
530 | if (write_sq.active & AMI_PLAY_PLAYING) | |
531 | /* Increase threshold: frame 1 is already being played */ | |
532 | minframes = 2; | |
533 | ||
534 | if (write_sq.count < minframes) { | |
535 | /* Nothing to do */ | |
536 | custom.intena = IF_SETCLR | IF_AUD0; | |
537 | return; | |
538 | } | |
539 | ||
540 | if (write_sq.count <= minframes && | |
541 | write_sq.rear_size < write_sq.block_size && !write_sq.syncing) { | |
542 | /* hmmm, the only existing frame is not | |
543 | * yet filled and we're not syncing? | |
544 | */ | |
545 | custom.intena = IF_SETCLR | IF_AUD0; | |
546 | return; | |
547 | } | |
548 | ||
549 | AmiPlayNextFrame(minframes); | |
550 | ||
551 | custom.intena = IF_SETCLR | IF_AUD0; | |
552 | } | |
553 | ||
554 | ||
7d12e780 | 555 | static irqreturn_t AmiInterrupt(int irq, void *dummy) |
1da177e4 LT |
556 | { |
557 | int minframes = 1; | |
558 | ||
559 | custom.intena = IF_AUD0; | |
560 | ||
561 | if (!write_sq.active) { | |
562 | /* Playing was interrupted and sq_reset() has already cleared | |
563 | * the sq variables, so better don't do anything here. | |
564 | */ | |
565 | WAKE_UP(write_sq.sync_queue); | |
566 | return IRQ_HANDLED; | |
567 | } | |
568 | ||
569 | if (write_sq.active & AMI_PLAY_PLAYING) { | |
570 | /* We've just finished a frame */ | |
571 | write_sq.count--; | |
572 | WAKE_UP(write_sq.action_queue); | |
573 | } | |
574 | ||
575 | if (write_sq.active & AMI_PLAY_LOADED) | |
576 | /* Increase threshold: frame 1 is already being played */ | |
577 | minframes = 2; | |
578 | ||
579 | /* Shift the flags */ | |
580 | write_sq.active = (write_sq.active<<1) & AMI_PLAY_MASK; | |
581 | ||
582 | if (!write_sq.active) | |
583 | /* No frame is playing, disable audio DMA */ | |
584 | StopDMA(); | |
585 | ||
586 | custom.intena = IF_SETCLR | IF_AUD0; | |
587 | ||
588 | if (write_sq.count >= minframes) | |
589 | /* Try to play the next frame */ | |
590 | AmiPlay(); | |
591 | ||
592 | if (!write_sq.active) | |
593 | /* Nothing to play anymore. | |
594 | Wake up a process waiting for audio output to drain. */ | |
595 | WAKE_UP(write_sq.sync_queue); | |
596 | return IRQ_HANDLED; | |
597 | } | |
598 | ||
599 | /*** Mid level stuff *********************************************************/ | |
600 | ||
601 | ||
602 | /* | |
603 | * /dev/mixer abstraction | |
604 | */ | |
605 | ||
606 | static void __init AmiMixerInit(void) | |
607 | { | |
608 | dmasound.volume_left = 64; | |
609 | dmasound.volume_right = 64; | |
610 | custom.aud[0].audvol = dmasound.volume_left; | |
611 | custom.aud[3].audvol = 1; /* For pseudo 14bit */ | |
612 | custom.aud[1].audvol = dmasound.volume_right; | |
613 | custom.aud[2].audvol = 1; /* For pseudo 14bit */ | |
614 | dmasound.treble = 50; | |
615 | } | |
616 | ||
617 | static int AmiMixerIoctl(u_int cmd, u_long arg) | |
618 | { | |
619 | int data; | |
620 | switch (cmd) { | |
621 | case SOUND_MIXER_READ_DEVMASK: | |
622 | return IOCTL_OUT(arg, SOUND_MASK_VOLUME | SOUND_MASK_TREBLE); | |
623 | case SOUND_MIXER_READ_RECMASK: | |
624 | return IOCTL_OUT(arg, 0); | |
625 | case SOUND_MIXER_READ_STEREODEVS: | |
626 | return IOCTL_OUT(arg, SOUND_MASK_VOLUME); | |
627 | case SOUND_MIXER_READ_VOLUME: | |
628 | return IOCTL_OUT(arg, | |
629 | VOLUME_AMI_TO_VOXWARE(dmasound.volume_left) | | |
630 | VOLUME_AMI_TO_VOXWARE(dmasound.volume_right) << 8); | |
631 | case SOUND_MIXER_WRITE_VOLUME: | |
632 | IOCTL_IN(arg, data); | |
633 | return IOCTL_OUT(arg, dmasound_set_volume(data)); | |
634 | case SOUND_MIXER_READ_TREBLE: | |
635 | return IOCTL_OUT(arg, dmasound.treble); | |
636 | case SOUND_MIXER_WRITE_TREBLE: | |
637 | IOCTL_IN(arg, data); | |
638 | return IOCTL_OUT(arg, dmasound_set_treble(data)); | |
639 | } | |
640 | return -EINVAL; | |
641 | } | |
642 | ||
643 | ||
644 | static int AmiWriteSqSetup(void) | |
645 | { | |
646 | write_sq_block_size_half = write_sq.block_size>>1; | |
647 | write_sq_block_size_quarter = write_sq_block_size_half>>1; | |
648 | return 0; | |
649 | } | |
650 | ||
651 | ||
652 | static int AmiStateInfo(char *buffer, size_t space) | |
653 | { | |
654 | int len = 0; | |
655 | len += sprintf(buffer+len, "\tsound.volume_left = %d [0...64]\n", | |
656 | dmasound.volume_left); | |
657 | len += sprintf(buffer+len, "\tsound.volume_right = %d [0...64]\n", | |
658 | dmasound.volume_right); | |
659 | if (len >= space) { | |
af901ca1 | 660 | printk(KERN_ERR "dmasound_paula: overflowed state buffer alloc.\n") ; |
1da177e4 LT |
661 | len = space ; |
662 | } | |
663 | return len; | |
664 | } | |
665 | ||
666 | ||
667 | /*** Machine definitions *****************************************************/ | |
668 | ||
669 | static SETTINGS def_hard = { | |
670 | .format = AFMT_S8, | |
671 | .stereo = 0, | |
672 | .size = 8, | |
673 | .speed = 8000 | |
674 | } ; | |
675 | ||
676 | static SETTINGS def_soft = { | |
677 | .format = AFMT_U8, | |
678 | .stereo = 0, | |
679 | .size = 8, | |
680 | .speed = 8000 | |
681 | } ; | |
682 | ||
683 | static MACHINE machAmiga = { | |
684 | .name = "Amiga", | |
685 | .name2 = "AMIGA", | |
686 | .owner = THIS_MODULE, | |
687 | .dma_alloc = AmiAlloc, | |
688 | .dma_free = AmiFree, | |
689 | .irqinit = AmiIrqInit, | |
690 | #ifdef MODULE | |
691 | .irqcleanup = AmiIrqCleanUp, | |
692 | #endif /* MODULE */ | |
693 | .init = AmiInit, | |
694 | .silence = AmiSilence, | |
695 | .setFormat = AmiSetFormat, | |
696 | .setVolume = AmiSetVolume, | |
697 | .setTreble = AmiSetTreble, | |
698 | .play = AmiPlay, | |
699 | .mixer_init = AmiMixerInit, | |
700 | .mixer_ioctl = AmiMixerIoctl, | |
701 | .write_sq_setup = AmiWriteSqSetup, | |
702 | .state_info = AmiStateInfo, | |
703 | .min_dsp_speed = 8000, | |
704 | .version = ((DMASOUND_PAULA_REVISION<<8) | DMASOUND_PAULA_EDITION), | |
705 | .hardware_afmts = (AFMT_S8 | AFMT_S16_BE), /* h'ware-supported formats *only* here */ | |
706 | .capabilities = DSP_CAP_BATCH /* As per SNDCTL_DSP_GETCAPS */ | |
707 | }; | |
708 | ||
709 | ||
710 | /*** Config & Setup **********************************************************/ | |
711 | ||
712 | ||
0a1b42db | 713 | static int __init dmasound_paula_init(void) |
1da177e4 LT |
714 | { |
715 | int err; | |
716 | ||
717 | if (MACH_IS_AMIGA && AMIGAHW_PRESENT(AMI_AUDIO)) { | |
718 | if (!request_mem_region(CUSTOM_PHYSADDR+0xa0, 0x40, | |
719 | "dmasound [Paula]")) | |
720 | return -EBUSY; | |
721 | dmasound.mach = machAmiga; | |
722 | dmasound.mach.default_hard = def_hard ; | |
723 | dmasound.mach.default_soft = def_soft ; | |
724 | err = dmasound_init(); | |
725 | if (err) | |
726 | release_mem_region(CUSTOM_PHYSADDR+0xa0, 0x40); | |
727 | return err; | |
728 | } else | |
729 | return -ENODEV; | |
730 | } | |
731 | ||
732 | static void __exit dmasound_paula_cleanup(void) | |
733 | { | |
734 | dmasound_deinit(); | |
735 | release_mem_region(CUSTOM_PHYSADDR+0xa0, 0x40); | |
736 | } | |
737 | ||
738 | module_init(dmasound_paula_init); | |
739 | module_exit(dmasound_paula_cleanup); | |
740 | MODULE_LICENSE("GPL"); |