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> | |
ff2db7c5 | 24 | #include <linux/platform_device.h> |
1da177e4 LT |
25 | |
26 | #include <asm/uaccess.h> | |
27 | #include <asm/setup.h> | |
28 | #include <asm/amigahw.h> | |
29 | #include <asm/amigaints.h> | |
30 | #include <asm/machdep.h> | |
31 | ||
32 | #include "dmasound.h" | |
33 | ||
34 | #define DMASOUND_PAULA_REVISION 0 | |
35 | #define DMASOUND_PAULA_EDITION 4 | |
36 | ||
b4290a23 | 37 | #define custom amiga_custom |
1da177e4 LT |
38 | /* |
39 | * The minimum period for audio depends on htotal (for OCS/ECS/AGA) | |
40 | * (Imported from arch/m68k/amiga/amisound.c) | |
41 | */ | |
42 | ||
43 | extern volatile u_short amiga_audio_min_period; | |
44 | ||
45 | ||
46 | /* | |
47 | * amiga_mksound() should be able to restore the period after beeping | |
48 | * (Imported from arch/m68k/amiga/amisound.c) | |
49 | */ | |
50 | ||
51 | extern u_short amiga_audio_period; | |
52 | ||
53 | ||
54 | /* | |
55 | * Audio DMA masks | |
56 | */ | |
57 | ||
58 | #define AMI_AUDIO_OFF (DMAF_AUD0 | DMAF_AUD1 | DMAF_AUD2 | DMAF_AUD3) | |
59 | #define AMI_AUDIO_8 (DMAF_SETCLR | DMAF_MASTER | DMAF_AUD0 | DMAF_AUD1) | |
60 | #define AMI_AUDIO_14 (AMI_AUDIO_8 | DMAF_AUD2 | DMAF_AUD3) | |
61 | ||
62 | ||
63 | /* | |
64 | * Helper pointers for 16(14)-bit sound | |
65 | */ | |
66 | ||
67 | static int write_sq_block_size_half, write_sq_block_size_quarter; | |
68 | ||
69 | ||
70 | /*** Low level stuff *********************************************************/ | |
71 | ||
72 | ||
1ef64e67 | 73 | static void *AmiAlloc(unsigned int size, gfp_t flags); |
1da177e4 LT |
74 | static void AmiFree(void *obj, unsigned int size); |
75 | static int AmiIrqInit(void); | |
76 | #ifdef MODULE | |
77 | static void AmiIrqCleanUp(void); | |
78 | #endif | |
79 | static void AmiSilence(void); | |
80 | static void AmiInit(void); | |
81 | static int AmiSetFormat(int format); | |
82 | static int AmiSetVolume(int volume); | |
83 | static int AmiSetTreble(int treble); | |
84 | static void AmiPlayNextFrame(int index); | |
85 | static void AmiPlay(void); | |
7d12e780 | 86 | static irqreturn_t AmiInterrupt(int irq, void *dummy); |
1da177e4 LT |
87 | |
88 | #ifdef CONFIG_HEARTBEAT | |
89 | ||
90 | /* | |
91 | * Heartbeat interferes with sound since the 7 kHz low-pass filter and the | |
92 | * power LED are controlled by the same line. | |
93 | */ | |
94 | ||
1da177e4 LT |
95 | static void (*saved_heartbeat)(int) = NULL; |
96 | ||
97 | static inline void disable_heartbeat(void) | |
98 | { | |
99 | if (mach_heartbeat) { | |
100 | saved_heartbeat = mach_heartbeat; | |
101 | mach_heartbeat = NULL; | |
102 | } | |
103 | AmiSetTreble(dmasound.treble); | |
104 | } | |
105 | ||
106 | static inline void enable_heartbeat(void) | |
107 | { | |
108 | if (saved_heartbeat) | |
109 | mach_heartbeat = saved_heartbeat; | |
110 | } | |
111 | #else /* !CONFIG_HEARTBEAT */ | |
112 | #define disable_heartbeat() do { } while (0) | |
113 | #define enable_heartbeat() do { } while (0) | |
114 | #endif /* !CONFIG_HEARTBEAT */ | |
115 | ||
116 | ||
117 | /*** Mid level stuff *********************************************************/ | |
118 | ||
119 | static void AmiMixerInit(void); | |
120 | static int AmiMixerIoctl(u_int cmd, u_long arg); | |
121 | static int AmiWriteSqSetup(void); | |
122 | static int AmiStateInfo(char *buffer, size_t space); | |
123 | ||
124 | ||
125 | /*** Translations ************************************************************/ | |
126 | ||
127 | /* ++TeSche: radically changed for new expanding purposes... | |
128 | * | |
129 | * These two routines now deal with copying/expanding/translating the samples | |
130 | * from user space into our buffer at the right frequency. They take care about | |
131 | * how much data there's actually to read, how much buffer space there is and | |
132 | * to convert samples into the right frequency/encoding. They will only work on | |
133 | * complete samples so it may happen they leave some bytes in the input stream | |
134 | * if the user didn't write a multiple of the current sample size. They both | |
135 | * return the number of bytes they've used from both streams so you may detect | |
136 | * such a situation. Luckily all programs should be able to cope with that. | |
137 | * | |
138 | * I think I've optimized anything as far as one can do in plain C, all | |
139 | * variables should fit in registers and the loops are really short. There's | |
140 | * one loop for every possible situation. Writing a more generalized and thus | |
141 | * parameterized loop would only produce slower code. Feel free to optimize | |
142 | * this in assembler if you like. :) | |
143 | * | |
144 | * I think these routines belong here because they're not yet really hardware | |
145 | * independent, especially the fact that the Falcon can play 16bit samples | |
146 | * only in stereo is hardcoded in both of them! | |
147 | * | |
148 | * ++geert: split in even more functions (one per format) | |
149 | */ | |
150 | ||
151 | ||
152 | /* | |
153 | * Native format | |
154 | */ | |
155 | ||
031eb4cd | 156 | static ssize_t ami_ct_s8(const u_char __user *userPtr, size_t userCount, |
1da177e4 LT |
157 | u_char frame[], ssize_t *frameUsed, ssize_t frameLeft) |
158 | { | |
159 | ssize_t count, used; | |
160 | ||
161 | if (!dmasound.soft.stereo) { | |
162 | void *p = &frame[*frameUsed]; | |
163 | count = min_t(unsigned long, userCount, frameLeft) & ~1; | |
164 | used = count; | |
165 | if (copy_from_user(p, userPtr, count)) | |
166 | return -EFAULT; | |
167 | } else { | |
168 | u_char *left = &frame[*frameUsed>>1]; | |
169 | u_char *right = left+write_sq_block_size_half; | |
170 | count = min_t(unsigned long, userCount, frameLeft)>>1 & ~1; | |
171 | used = count*2; | |
172 | while (count > 0) { | |
173 | if (get_user(*left++, userPtr++) | |
174 | || get_user(*right++, userPtr++)) | |
175 | return -EFAULT; | |
176 | count--; | |
177 | } | |
178 | } | |
179 | *frameUsed += used; | |
180 | return used; | |
181 | } | |
182 | ||
183 | ||
184 | /* | |
185 | * Copy and convert 8 bit data | |
186 | */ | |
187 | ||
188 | #define GENERATE_AMI_CT8(funcname, convsample) \ | |
031eb4cd | 189 | static ssize_t funcname(const u_char __user *userPtr, size_t userCount, \ |
1da177e4 LT |
190 | u_char frame[], ssize_t *frameUsed, \ |
191 | ssize_t frameLeft) \ | |
192 | { \ | |
193 | ssize_t count, used; \ | |
194 | \ | |
195 | if (!dmasound.soft.stereo) { \ | |
196 | u_char *p = &frame[*frameUsed]; \ | |
197 | count = min_t(size_t, userCount, frameLeft) & ~1; \ | |
198 | used = count; \ | |
199 | while (count > 0) { \ | |
200 | u_char data; \ | |
201 | if (get_user(data, userPtr++)) \ | |
202 | return -EFAULT; \ | |
203 | *p++ = convsample(data); \ | |
204 | count--; \ | |
205 | } \ | |
206 | } else { \ | |
207 | u_char *left = &frame[*frameUsed>>1]; \ | |
208 | u_char *right = left+write_sq_block_size_half; \ | |
209 | count = min_t(size_t, userCount, frameLeft)>>1 & ~1; \ | |
210 | used = count*2; \ | |
211 | while (count > 0) { \ | |
212 | u_char data; \ | |
213 | if (get_user(data, userPtr++)) \ | |
214 | return -EFAULT; \ | |
215 | *left++ = convsample(data); \ | |
216 | if (get_user(data, userPtr++)) \ | |
217 | return -EFAULT; \ | |
218 | *right++ = convsample(data); \ | |
219 | count--; \ | |
220 | } \ | |
221 | } \ | |
222 | *frameUsed += used; \ | |
223 | return used; \ | |
224 | } | |
225 | ||
226 | #define AMI_CT_ULAW(x) (dmasound_ulaw2dma8[(x)]) | |
227 | #define AMI_CT_ALAW(x) (dmasound_alaw2dma8[(x)]) | |
228 | #define AMI_CT_U8(x) ((x) ^ 0x80) | |
229 | ||
230 | GENERATE_AMI_CT8(ami_ct_ulaw, AMI_CT_ULAW) | |
231 | GENERATE_AMI_CT8(ami_ct_alaw, AMI_CT_ALAW) | |
232 | GENERATE_AMI_CT8(ami_ct_u8, AMI_CT_U8) | |
233 | ||
234 | ||
235 | /* | |
236 | * Copy and convert 16 bit data | |
237 | */ | |
238 | ||
239 | #define GENERATE_AMI_CT_16(funcname, convsample) \ | |
031eb4cd | 240 | static ssize_t funcname(const u_char __user *userPtr, size_t userCount, \ |
1da177e4 LT |
241 | u_char frame[], ssize_t *frameUsed, \ |
242 | ssize_t frameLeft) \ | |
243 | { \ | |
031eb4cd | 244 | const u_short __user *ptr = (const u_short __user *)userPtr; \ |
1da177e4 LT |
245 | ssize_t count, used; \ |
246 | u_short data; \ | |
247 | \ | |
248 | if (!dmasound.soft.stereo) { \ | |
249 | u_char *high = &frame[*frameUsed>>1]; \ | |
250 | u_char *low = high+write_sq_block_size_half; \ | |
251 | count = min_t(size_t, userCount, frameLeft)>>1 & ~1; \ | |
252 | used = count*2; \ | |
253 | while (count > 0) { \ | |
815f597b | 254 | if (get_user(data, ptr++)) \ |
1da177e4 LT |
255 | return -EFAULT; \ |
256 | data = convsample(data); \ | |
257 | *high++ = data>>8; \ | |
258 | *low++ = (data>>2) & 0x3f; \ | |
259 | count--; \ | |
260 | } \ | |
261 | } else { \ | |
262 | u_char *lefth = &frame[*frameUsed>>2]; \ | |
263 | u_char *leftl = lefth+write_sq_block_size_quarter; \ | |
264 | u_char *righth = lefth+write_sq_block_size_half; \ | |
265 | u_char *rightl = righth+write_sq_block_size_quarter; \ | |
266 | count = min_t(size_t, userCount, frameLeft)>>2 & ~1; \ | |
267 | used = count*4; \ | |
268 | while (count > 0) { \ | |
815f597b | 269 | if (get_user(data, ptr++)) \ |
1da177e4 LT |
270 | return -EFAULT; \ |
271 | data = convsample(data); \ | |
272 | *lefth++ = data>>8; \ | |
273 | *leftl++ = (data>>2) & 0x3f; \ | |
815f597b | 274 | if (get_user(data, ptr++)) \ |
1da177e4 LT |
275 | return -EFAULT; \ |
276 | data = convsample(data); \ | |
277 | *righth++ = data>>8; \ | |
278 | *rightl++ = (data>>2) & 0x3f; \ | |
279 | count--; \ | |
280 | } \ | |
281 | } \ | |
282 | *frameUsed += used; \ | |
283 | return used; \ | |
284 | } | |
285 | ||
286 | #define AMI_CT_S16BE(x) (x) | |
287 | #define AMI_CT_U16BE(x) ((x) ^ 0x8000) | |
288 | #define AMI_CT_S16LE(x) (le2be16((x))) | |
289 | #define AMI_CT_U16LE(x) (le2be16((x)) ^ 0x8000) | |
290 | ||
291 | GENERATE_AMI_CT_16(ami_ct_s16be, AMI_CT_S16BE) | |
292 | GENERATE_AMI_CT_16(ami_ct_u16be, AMI_CT_U16BE) | |
293 | GENERATE_AMI_CT_16(ami_ct_s16le, AMI_CT_S16LE) | |
294 | GENERATE_AMI_CT_16(ami_ct_u16le, AMI_CT_U16LE) | |
295 | ||
296 | ||
297 | static TRANS transAmiga = { | |
298 | .ct_ulaw = ami_ct_ulaw, | |
299 | .ct_alaw = ami_ct_alaw, | |
300 | .ct_s8 = ami_ct_s8, | |
301 | .ct_u8 = ami_ct_u8, | |
302 | .ct_s16be = ami_ct_s16be, | |
303 | .ct_u16be = ami_ct_u16be, | |
304 | .ct_s16le = ami_ct_s16le, | |
305 | .ct_u16le = ami_ct_u16le, | |
306 | }; | |
307 | ||
308 | /*** Low level stuff *********************************************************/ | |
309 | ||
310 | static inline void StopDMA(void) | |
311 | { | |
312 | custom.aud[0].audvol = custom.aud[1].audvol = 0; | |
313 | custom.aud[2].audvol = custom.aud[3].audvol = 0; | |
314 | custom.dmacon = AMI_AUDIO_OFF; | |
315 | enable_heartbeat(); | |
316 | } | |
317 | ||
1ef64e67 | 318 | static void *AmiAlloc(unsigned int size, gfp_t flags) |
1da177e4 LT |
319 | { |
320 | return amiga_chip_alloc((long)size, "dmasound [Paula]"); | |
321 | } | |
322 | ||
323 | static void AmiFree(void *obj, unsigned int size) | |
324 | { | |
325 | amiga_chip_free (obj); | |
326 | } | |
327 | ||
328 | static int __init AmiIrqInit(void) | |
329 | { | |
330 | /* turn off DMA for audio channels */ | |
331 | StopDMA(); | |
332 | ||
333 | /* Register interrupt handler. */ | |
334 | if (request_irq(IRQ_AMIGA_AUD0, AmiInterrupt, 0, "DMA sound", | |
335 | AmiInterrupt)) | |
336 | return 0; | |
337 | return 1; | |
338 | } | |
339 | ||
340 | #ifdef MODULE | |
341 | static void AmiIrqCleanUp(void) | |
342 | { | |
343 | /* turn off DMA for audio channels */ | |
344 | StopDMA(); | |
345 | /* release the interrupt */ | |
346 | free_irq(IRQ_AMIGA_AUD0, AmiInterrupt); | |
347 | } | |
348 | #endif /* MODULE */ | |
349 | ||
350 | static void AmiSilence(void) | |
351 | { | |
352 | /* turn off DMA for audio channels */ | |
353 | StopDMA(); | |
354 | } | |
355 | ||
356 | ||
357 | static void AmiInit(void) | |
358 | { | |
359 | int period, i; | |
360 | ||
361 | AmiSilence(); | |
362 | ||
363 | if (dmasound.soft.speed) | |
364 | period = amiga_colorclock/dmasound.soft.speed-1; | |
365 | else | |
366 | period = amiga_audio_min_period; | |
367 | dmasound.hard = dmasound.soft; | |
368 | dmasound.trans_write = &transAmiga; | |
369 | ||
370 | if (period < amiga_audio_min_period) { | |
371 | /* we would need to squeeze the sound, but we won't do that */ | |
372 | period = amiga_audio_min_period; | |
373 | } else if (period > 65535) { | |
374 | period = 65535; | |
375 | } | |
376 | dmasound.hard.speed = amiga_colorclock/(period+1); | |
377 | ||
378 | for (i = 0; i < 4; i++) | |
379 | custom.aud[i].audper = period; | |
380 | amiga_audio_period = period; | |
381 | } | |
382 | ||
383 | ||
384 | static int AmiSetFormat(int format) | |
385 | { | |
386 | int size; | |
387 | ||
388 | /* Amiga sound DMA supports 8bit and 16bit (pseudo 14 bit) modes */ | |
389 | ||
390 | switch (format) { | |
391 | case AFMT_QUERY: | |
392 | return dmasound.soft.format; | |
393 | case AFMT_MU_LAW: | |
394 | case AFMT_A_LAW: | |
395 | case AFMT_U8: | |
396 | case AFMT_S8: | |
397 | size = 8; | |
398 | break; | |
399 | case AFMT_S16_BE: | |
400 | case AFMT_U16_BE: | |
401 | case AFMT_S16_LE: | |
402 | case AFMT_U16_LE: | |
403 | size = 16; | |
404 | break; | |
405 | default: /* :-) */ | |
406 | size = 8; | |
407 | format = AFMT_S8; | |
408 | } | |
409 | ||
410 | dmasound.soft.format = format; | |
411 | dmasound.soft.size = size; | |
412 | if (dmasound.minDev == SND_DEV_DSP) { | |
413 | dmasound.dsp.format = format; | |
414 | dmasound.dsp.size = dmasound.soft.size; | |
415 | } | |
416 | AmiInit(); | |
417 | ||
418 | return format; | |
419 | } | |
420 | ||
421 | ||
422 | #define VOLUME_VOXWARE_TO_AMI(v) \ | |
423 | (((v) < 0) ? 0 : ((v) > 100) ? 64 : ((v) * 64)/100) | |
424 | #define VOLUME_AMI_TO_VOXWARE(v) ((v)*100/64) | |
425 | ||
426 | static int AmiSetVolume(int volume) | |
427 | { | |
428 | dmasound.volume_left = VOLUME_VOXWARE_TO_AMI(volume & 0xff); | |
429 | custom.aud[0].audvol = dmasound.volume_left; | |
430 | dmasound.volume_right = VOLUME_VOXWARE_TO_AMI((volume & 0xff00) >> 8); | |
431 | custom.aud[1].audvol = dmasound.volume_right; | |
432 | if (dmasound.hard.size == 16) { | |
433 | if (dmasound.volume_left == 64 && dmasound.volume_right == 64) { | |
434 | custom.aud[2].audvol = 1; | |
435 | custom.aud[3].audvol = 1; | |
436 | } else { | |
437 | custom.aud[2].audvol = 0; | |
438 | custom.aud[3].audvol = 0; | |
439 | } | |
440 | } | |
441 | return VOLUME_AMI_TO_VOXWARE(dmasound.volume_left) | | |
442 | (VOLUME_AMI_TO_VOXWARE(dmasound.volume_right) << 8); | |
443 | } | |
444 | ||
445 | static int AmiSetTreble(int treble) | |
446 | { | |
447 | dmasound.treble = treble; | |
448 | if (treble < 50) | |
449 | ciaa.pra &= ~0x02; | |
450 | else | |
451 | ciaa.pra |= 0x02; | |
452 | return treble; | |
453 | } | |
454 | ||
455 | ||
456 | #define AMI_PLAY_LOADED 1 | |
457 | #define AMI_PLAY_PLAYING 2 | |
458 | #define AMI_PLAY_MASK 3 | |
459 | ||
460 | ||
461 | static void AmiPlayNextFrame(int index) | |
462 | { | |
463 | u_char *start, *ch0, *ch1, *ch2, *ch3; | |
464 | u_long size; | |
465 | ||
466 | /* used by AmiPlay() if all doubts whether there really is something | |
467 | * to be played are already wiped out. | |
468 | */ | |
469 | start = write_sq.buffers[write_sq.front]; | |
470 | size = (write_sq.count == index ? write_sq.rear_size | |
471 | : write_sq.block_size)>>1; | |
472 | ||
473 | if (dmasound.hard.stereo) { | |
474 | ch0 = start; | |
475 | ch1 = start+write_sq_block_size_half; | |
476 | size >>= 1; | |
477 | } else { | |
478 | ch0 = start; | |
479 | ch1 = start; | |
480 | } | |
481 | ||
482 | disable_heartbeat(); | |
483 | custom.aud[0].audvol = dmasound.volume_left; | |
484 | custom.aud[1].audvol = dmasound.volume_right; | |
485 | if (dmasound.hard.size == 8) { | |
486 | custom.aud[0].audlc = (u_short *)ZTWO_PADDR(ch0); | |
487 | custom.aud[0].audlen = size; | |
488 | custom.aud[1].audlc = (u_short *)ZTWO_PADDR(ch1); | |
489 | custom.aud[1].audlen = size; | |
490 | custom.dmacon = AMI_AUDIO_8; | |
491 | } else { | |
492 | size >>= 1; | |
493 | custom.aud[0].audlc = (u_short *)ZTWO_PADDR(ch0); | |
494 | custom.aud[0].audlen = size; | |
495 | custom.aud[1].audlc = (u_short *)ZTWO_PADDR(ch1); | |
496 | custom.aud[1].audlen = size; | |
497 | if (dmasound.volume_left == 64 && dmasound.volume_right == 64) { | |
498 | /* We can play pseudo 14-bit only with the maximum volume */ | |
499 | ch3 = ch0+write_sq_block_size_quarter; | |
500 | ch2 = ch1+write_sq_block_size_quarter; | |
501 | custom.aud[2].audvol = 1; /* we are being affected by the beeps */ | |
502 | custom.aud[3].audvol = 1; /* restoring volume here helps a bit */ | |
503 | custom.aud[2].audlc = (u_short *)ZTWO_PADDR(ch2); | |
504 | custom.aud[2].audlen = size; | |
505 | custom.aud[3].audlc = (u_short *)ZTWO_PADDR(ch3); | |
506 | custom.aud[3].audlen = size; | |
507 | custom.dmacon = AMI_AUDIO_14; | |
508 | } else { | |
509 | custom.aud[2].audvol = 0; | |
510 | custom.aud[3].audvol = 0; | |
511 | custom.dmacon = AMI_AUDIO_8; | |
512 | } | |
513 | } | |
514 | write_sq.front = (write_sq.front+1) % write_sq.max_count; | |
515 | write_sq.active |= AMI_PLAY_LOADED; | |
516 | } | |
517 | ||
518 | ||
519 | static void AmiPlay(void) | |
520 | { | |
521 | int minframes = 1; | |
522 | ||
523 | custom.intena = IF_AUD0; | |
524 | ||
525 | if (write_sq.active & AMI_PLAY_LOADED) { | |
526 | /* There's already a frame loaded */ | |
527 | custom.intena = IF_SETCLR | IF_AUD0; | |
528 | return; | |
529 | } | |
530 | ||
531 | if (write_sq.active & AMI_PLAY_PLAYING) | |
532 | /* Increase threshold: frame 1 is already being played */ | |
533 | minframes = 2; | |
534 | ||
535 | if (write_sq.count < minframes) { | |
536 | /* Nothing to do */ | |
537 | custom.intena = IF_SETCLR | IF_AUD0; | |
538 | return; | |
539 | } | |
540 | ||
541 | if (write_sq.count <= minframes && | |
542 | write_sq.rear_size < write_sq.block_size && !write_sq.syncing) { | |
543 | /* hmmm, the only existing frame is not | |
544 | * yet filled and we're not syncing? | |
545 | */ | |
546 | custom.intena = IF_SETCLR | IF_AUD0; | |
547 | return; | |
548 | } | |
549 | ||
550 | AmiPlayNextFrame(minframes); | |
551 | ||
552 | custom.intena = IF_SETCLR | IF_AUD0; | |
553 | } | |
554 | ||
555 | ||
7d12e780 | 556 | static irqreturn_t AmiInterrupt(int irq, void *dummy) |
1da177e4 LT |
557 | { |
558 | int minframes = 1; | |
559 | ||
560 | custom.intena = IF_AUD0; | |
561 | ||
562 | if (!write_sq.active) { | |
563 | /* Playing was interrupted and sq_reset() has already cleared | |
564 | * the sq variables, so better don't do anything here. | |
565 | */ | |
566 | WAKE_UP(write_sq.sync_queue); | |
567 | return IRQ_HANDLED; | |
568 | } | |
569 | ||
570 | if (write_sq.active & AMI_PLAY_PLAYING) { | |
571 | /* We've just finished a frame */ | |
572 | write_sq.count--; | |
573 | WAKE_UP(write_sq.action_queue); | |
574 | } | |
575 | ||
576 | if (write_sq.active & AMI_PLAY_LOADED) | |
577 | /* Increase threshold: frame 1 is already being played */ | |
578 | minframes = 2; | |
579 | ||
580 | /* Shift the flags */ | |
581 | write_sq.active = (write_sq.active<<1) & AMI_PLAY_MASK; | |
582 | ||
583 | if (!write_sq.active) | |
584 | /* No frame is playing, disable audio DMA */ | |
585 | StopDMA(); | |
586 | ||
587 | custom.intena = IF_SETCLR | IF_AUD0; | |
588 | ||
589 | if (write_sq.count >= minframes) | |
590 | /* Try to play the next frame */ | |
591 | AmiPlay(); | |
592 | ||
593 | if (!write_sq.active) | |
594 | /* Nothing to play anymore. | |
595 | Wake up a process waiting for audio output to drain. */ | |
596 | WAKE_UP(write_sq.sync_queue); | |
597 | return IRQ_HANDLED; | |
598 | } | |
599 | ||
600 | /*** Mid level stuff *********************************************************/ | |
601 | ||
602 | ||
603 | /* | |
604 | * /dev/mixer abstraction | |
605 | */ | |
606 | ||
607 | static void __init AmiMixerInit(void) | |
608 | { | |
609 | dmasound.volume_left = 64; | |
610 | dmasound.volume_right = 64; | |
611 | custom.aud[0].audvol = dmasound.volume_left; | |
612 | custom.aud[3].audvol = 1; /* For pseudo 14bit */ | |
613 | custom.aud[1].audvol = dmasound.volume_right; | |
614 | custom.aud[2].audvol = 1; /* For pseudo 14bit */ | |
615 | dmasound.treble = 50; | |
616 | } | |
617 | ||
618 | static int AmiMixerIoctl(u_int cmd, u_long arg) | |
619 | { | |
620 | int data; | |
621 | switch (cmd) { | |
622 | case SOUND_MIXER_READ_DEVMASK: | |
623 | return IOCTL_OUT(arg, SOUND_MASK_VOLUME | SOUND_MASK_TREBLE); | |
624 | case SOUND_MIXER_READ_RECMASK: | |
625 | return IOCTL_OUT(arg, 0); | |
626 | case SOUND_MIXER_READ_STEREODEVS: | |
627 | return IOCTL_OUT(arg, SOUND_MASK_VOLUME); | |
628 | case SOUND_MIXER_READ_VOLUME: | |
629 | return IOCTL_OUT(arg, | |
630 | VOLUME_AMI_TO_VOXWARE(dmasound.volume_left) | | |
631 | VOLUME_AMI_TO_VOXWARE(dmasound.volume_right) << 8); | |
632 | case SOUND_MIXER_WRITE_VOLUME: | |
633 | IOCTL_IN(arg, data); | |
634 | return IOCTL_OUT(arg, dmasound_set_volume(data)); | |
635 | case SOUND_MIXER_READ_TREBLE: | |
636 | return IOCTL_OUT(arg, dmasound.treble); | |
637 | case SOUND_MIXER_WRITE_TREBLE: | |
638 | IOCTL_IN(arg, data); | |
639 | return IOCTL_OUT(arg, dmasound_set_treble(data)); | |
640 | } | |
641 | return -EINVAL; | |
642 | } | |
643 | ||
644 | ||
645 | static int AmiWriteSqSetup(void) | |
646 | { | |
647 | write_sq_block_size_half = write_sq.block_size>>1; | |
648 | write_sq_block_size_quarter = write_sq_block_size_half>>1; | |
649 | return 0; | |
650 | } | |
651 | ||
652 | ||
653 | static int AmiStateInfo(char *buffer, size_t space) | |
654 | { | |
655 | int len = 0; | |
656 | len += sprintf(buffer+len, "\tsound.volume_left = %d [0...64]\n", | |
657 | dmasound.volume_left); | |
658 | len += sprintf(buffer+len, "\tsound.volume_right = %d [0...64]\n", | |
659 | dmasound.volume_right); | |
660 | if (len >= space) { | |
af901ca1 | 661 | printk(KERN_ERR "dmasound_paula: overflowed state buffer alloc.\n") ; |
1da177e4 LT |
662 | len = space ; |
663 | } | |
664 | return len; | |
665 | } | |
666 | ||
667 | ||
668 | /*** Machine definitions *****************************************************/ | |
669 | ||
670 | static SETTINGS def_hard = { | |
671 | .format = AFMT_S8, | |
672 | .stereo = 0, | |
673 | .size = 8, | |
674 | .speed = 8000 | |
675 | } ; | |
676 | ||
677 | static SETTINGS def_soft = { | |
678 | .format = AFMT_U8, | |
679 | .stereo = 0, | |
680 | .size = 8, | |
681 | .speed = 8000 | |
682 | } ; | |
683 | ||
684 | static MACHINE machAmiga = { | |
685 | .name = "Amiga", | |
686 | .name2 = "AMIGA", | |
687 | .owner = THIS_MODULE, | |
688 | .dma_alloc = AmiAlloc, | |
689 | .dma_free = AmiFree, | |
690 | .irqinit = AmiIrqInit, | |
691 | #ifdef MODULE | |
692 | .irqcleanup = AmiIrqCleanUp, | |
693 | #endif /* MODULE */ | |
694 | .init = AmiInit, | |
695 | .silence = AmiSilence, | |
696 | .setFormat = AmiSetFormat, | |
697 | .setVolume = AmiSetVolume, | |
698 | .setTreble = AmiSetTreble, | |
699 | .play = AmiPlay, | |
700 | .mixer_init = AmiMixerInit, | |
701 | .mixer_ioctl = AmiMixerIoctl, | |
702 | .write_sq_setup = AmiWriteSqSetup, | |
703 | .state_info = AmiStateInfo, | |
704 | .min_dsp_speed = 8000, | |
705 | .version = ((DMASOUND_PAULA_REVISION<<8) | DMASOUND_PAULA_EDITION), | |
706 | .hardware_afmts = (AFMT_S8 | AFMT_S16_BE), /* h'ware-supported formats *only* here */ | |
707 | .capabilities = DSP_CAP_BATCH /* As per SNDCTL_DSP_GETCAPS */ | |
708 | }; | |
709 | ||
710 | ||
711 | /*** Config & Setup **********************************************************/ | |
712 | ||
713 | ||
ff2db7c5 | 714 | static int __init amiga_audio_probe(struct platform_device *pdev) |
1da177e4 | 715 | { |
ff2db7c5 GU |
716 | dmasound.mach = machAmiga; |
717 | dmasound.mach.default_hard = def_hard ; | |
718 | dmasound.mach.default_soft = def_soft ; | |
719 | return dmasound_init(); | |
1da177e4 LT |
720 | } |
721 | ||
ff2db7c5 | 722 | static int __exit amiga_audio_remove(struct platform_device *pdev) |
1da177e4 LT |
723 | { |
724 | dmasound_deinit(); | |
ff2db7c5 GU |
725 | return 0; |
726 | } | |
727 | ||
728 | static struct platform_driver amiga_audio_driver = { | |
729 | .remove = __exit_p(amiga_audio_remove), | |
730 | .driver = { | |
731 | .name = "amiga-audio", | |
ff2db7c5 GU |
732 | }, |
733 | }; | |
734 | ||
292ab81d | 735 | module_platform_driver_probe(amiga_audio_driver, amiga_audio_probe); |
ff2db7c5 | 736 | |
1da177e4 | 737 | MODULE_LICENSE("GPL"); |
ff2db7c5 | 738 | MODULE_ALIAS("platform:amiga-audio"); |