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dd7b254d GP |
1 | /**************************************************************************** |
2 | ||
3 | Copyright Echo Digital Audio Corporation (c) 1998 - 2004 | |
4 | All rights reserved | |
5 | www.echoaudio.com | |
6 | ||
7 | This file is part of Echo Digital Audio's generic driver library. | |
8 | ||
9 | Echo Digital Audio's generic driver library is free software; | |
10 | you can redistribute it and/or modify it under the terms of | |
11 | the GNU General Public License as published by the Free Software | |
12 | Foundation. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
22 | MA 02111-1307, USA. | |
23 | ||
24 | **************************************************************************** | |
25 | ||
26 | Translation from C++ and adaptation for use in ALSA-Driver | |
27 | were made by Giuliano Pochini <pochini@shiny.it> | |
28 | ||
29 | **************************************************************************** | |
30 | ||
31 | ||
32 | Here's a block diagram of how most of the cards work: | |
33 | ||
34 | +-----------+ | |
35 | record | |<-------------------- Inputs | |
36 | <-------| | | | |
37 | PCI | Transport | | | |
38 | bus | engine | \|/ | |
39 | ------->| | +-------+ | |
40 | play | |--->|monitor|-------> Outputs | |
41 | +-----------+ | mixer | | |
42 | +-------+ | |
43 | ||
44 | The lines going to and from the PCI bus represent "pipes". A pipe performs | |
45 | audio transport - moving audio data to and from buffers on the host via | |
46 | bus mastering. | |
47 | ||
48 | The inputs and outputs on the right represent input and output "busses." | |
49 | A bus is a physical, real connection to the outside world. An example | |
50 | of a bus would be the 1/4" analog connectors on the back of Layla or | |
51 | an RCA S/PDIF connector. | |
52 | ||
53 | For most cards, there is a one-to-one correspondence between outputs | |
54 | and busses; that is, each individual pipe is hard-wired to a single bus. | |
55 | ||
56 | Cards that work this way are Darla20, Gina20, Layla20, Darla24, Gina24, | |
57 | Layla24, Mona, and Indigo. | |
58 | ||
59 | ||
60 | Mia has a feature called "virtual outputs." | |
61 | ||
62 | ||
63 | +-----------+ | |
64 | record | |<----------------------------- Inputs | |
65 | <-------| | | | |
66 | PCI | Transport | | | |
67 | bus | engine | \|/ | |
68 | ------->| | +------+ +-------+ | |
69 | play | |-->|vmixer|-->|monitor|-------> Outputs | |
70 | +-----------+ +------+ | mixer | | |
71 | +-------+ | |
72 | ||
73 | ||
74 | Obviously, the difference here is the box labeled "vmixer." Vmixer is | |
75 | short for "virtual output mixer." For Mia, pipes are *not* hard-wired | |
76 | to a single bus; the vmixer lets you mix any pipe to any bus in any | |
77 | combination. | |
78 | ||
79 | Note, however, that the left-hand side of the diagram is unchanged. | |
80 | Transport works exactly the same way - the difference is in the mixer stage. | |
81 | ||
82 | ||
83 | Pipes and busses are numbered starting at zero. | |
84 | ||
85 | ||
86 | ||
87 | Pipe index | |
88 | ========== | |
89 | ||
90 | A number of calls in CEchoGals refer to a "pipe index". A pipe index is | |
91 | a unique number for a pipe that unambiguously refers to a playback or record | |
92 | pipe. Pipe indices are numbered starting with analog outputs, followed by | |
93 | digital outputs, then analog inputs, then digital inputs. | |
94 | ||
95 | Take Gina24 as an example: | |
96 | ||
97 | Pipe index | |
98 | ||
99 | 0-7 Analog outputs (0 .. FirstDigitalBusOut-1) | |
100 | 8-15 Digital outputs (FirstDigitalBusOut .. NumBussesOut-1) | |
101 | 16-17 Analog inputs | |
102 | 18-25 Digital inputs | |
103 | ||
104 | ||
105 | You get the pipe index by calling CEchoGals::OpenAudio; the other transport | |
106 | functions take the pipe index as a parameter. If you need a pipe index for | |
107 | some other reason, use the handy Makepipe_index method. | |
108 | ||
109 | ||
110 | Some calls take a CChannelMask parameter; CChannelMask is a handy way to | |
111 | group pipe indices. | |
112 | ||
113 | ||
114 | ||
115 | Digital mode switch | |
116 | =================== | |
117 | ||
118 | Some cards (right now, Gina24, Layla24, and Mona) have a Digital Mode Switch | |
119 | or DMS. Cards with a DMS can be set to one of three mutually exclusive | |
120 | digital modes: S/PDIF RCA, S/PDIF optical, or ADAT optical. | |
121 | ||
122 | This may create some confusion since ADAT optical is 8 channels wide and | |
123 | S/PDIF is only two channels wide. Gina24, Layla24, and Mona handle this | |
124 | by acting as if they always have 8 digital outs and ins. If you are in | |
125 | either S/PDIF mode, the last 6 channels don't do anything - data sent | |
126 | out these channels is thrown away and you will always record zeros. | |
127 | ||
128 | Note that with Gina24, Layla24, and Mona, sample rates above 50 kHz are | |
129 | only available if you have the card configured for S/PDIF optical or S/PDIF | |
130 | RCA. | |
131 | ||
132 | ||
133 | ||
134 | Double speed mode | |
135 | ================= | |
136 | ||
137 | Some of the cards support 88.2 kHz and 96 kHz sampling (Darla24, Gina24, | |
138 | Layla24, Mona, Mia, and Indigo). For these cards, the driver sometimes has | |
139 | to worry about "double speed mode"; double speed mode applies whenever the | |
140 | sampling rate is above 50 kHz. | |
141 | ||
142 | For instance, Mona and Layla24 support word clock sync. However, they | |
143 | actually support two different word clock modes - single speed (below | |
144 | 50 kHz) and double speed (above 50 kHz). The hardware detects if a single | |
145 | or double speed word clock signal is present; the generic code uses that | |
146 | information to determine which mode to use. | |
147 | ||
148 | The generic code takes care of all this for you. | |
149 | */ | |
150 | ||
151 | ||
152 | #ifndef _ECHOAUDIO_H_ | |
153 | #define _ECHOAUDIO_H_ | |
154 | ||
155 | ||
dd7b254d GP |
156 | #include "echoaudio_dsp.h" |
157 | ||
158 | ||
159 | ||
160 | /*********************************************************************** | |
161 | ||
162 | PCI configuration space | |
163 | ||
164 | ***********************************************************************/ | |
165 | ||
166 | /* | |
167 | * PCI vendor ID and device IDs for the hardware | |
168 | */ | |
169 | #define VENDOR_ID 0x1057 | |
170 | #define DEVICE_ID_56301 0x1801 | |
171 | #define DEVICE_ID_56361 0x3410 | |
172 | #define SUBVENDOR_ID 0xECC0 | |
173 | ||
174 | ||
175 | /* | |
176 | * Valid Echo PCI subsystem card IDs | |
177 | */ | |
178 | #define DARLA20 0x0010 | |
179 | #define GINA20 0x0020 | |
180 | #define LAYLA20 0x0030 | |
181 | #define DARLA24 0x0040 | |
182 | #define GINA24 0x0050 | |
183 | #define LAYLA24 0x0060 | |
184 | #define MONA 0x0070 | |
185 | #define MIA 0x0080 | |
186 | #define INDIGO 0x0090 | |
187 | #define INDIGO_IO 0x00a0 | |
188 | #define INDIGO_DJ 0x00b0 | |
a2328d02 GP |
189 | #define DC8 0x00c0 |
190 | #define INDIGO_IOX 0x00d0 | |
191 | #define INDIGO_DJX 0x00e0 | |
dd7b254d GP |
192 | #define ECHO3G 0x0100 |
193 | ||
194 | ||
195 | /************************************************************************ | |
196 | ||
197 | Array sizes and so forth | |
198 | ||
199 | ***********************************************************************/ | |
200 | ||
201 | /* | |
202 | * Sizes | |
203 | */ | |
204 | #define ECHO_MAXAUDIOINPUTS 32 /* Max audio input channels */ | |
205 | #define ECHO_MAXAUDIOOUTPUTS 32 /* Max audio output channels */ | |
206 | #define ECHO_MAXAUDIOPIPES 32 /* Max number of input and output | |
207 | * pipes */ | |
208 | #define E3G_MAX_OUTPUTS 16 | |
209 | #define ECHO_MAXMIDIJACKS 1 /* Max MIDI ports */ | |
210 | #define ECHO_MIDI_QUEUE_SZ 512 /* Max MIDI input queue entries */ | |
211 | #define ECHO_MTC_QUEUE_SZ 32 /* Max MIDI time code input queue | |
212 | * entries */ | |
213 | ||
214 | /* | |
215 | * MIDI activity indicator timeout | |
216 | */ | |
217 | #define MIDI_ACTIVITY_TIMEOUT_USEC 200000 | |
218 | ||
219 | ||
220 | /**************************************************************************** | |
221 | ||
222 | Clocks | |
223 | ||
224 | *****************************************************************************/ | |
225 | ||
226 | /* | |
227 | * Clock numbers | |
228 | */ | |
229 | #define ECHO_CLOCK_INTERNAL 0 | |
230 | #define ECHO_CLOCK_WORD 1 | |
231 | #define ECHO_CLOCK_SUPER 2 | |
232 | #define ECHO_CLOCK_SPDIF 3 | |
233 | #define ECHO_CLOCK_ADAT 4 | |
234 | #define ECHO_CLOCK_ESYNC 5 | |
235 | #define ECHO_CLOCK_ESYNC96 6 | |
236 | #define ECHO_CLOCK_MTC 7 | |
237 | #define ECHO_CLOCK_NUMBER 8 | |
238 | #define ECHO_CLOCKS 0xffff | |
239 | ||
240 | /* | |
241 | * Clock bit numbers - used to report capabilities and whatever clocks | |
242 | * are being detected dynamically. | |
243 | */ | |
244 | #define ECHO_CLOCK_BIT_INTERNAL (1 << ECHO_CLOCK_INTERNAL) | |
245 | #define ECHO_CLOCK_BIT_WORD (1 << ECHO_CLOCK_WORD) | |
246 | #define ECHO_CLOCK_BIT_SUPER (1 << ECHO_CLOCK_SUPER) | |
247 | #define ECHO_CLOCK_BIT_SPDIF (1 << ECHO_CLOCK_SPDIF) | |
248 | #define ECHO_CLOCK_BIT_ADAT (1 << ECHO_CLOCK_ADAT) | |
249 | #define ECHO_CLOCK_BIT_ESYNC (1 << ECHO_CLOCK_ESYNC) | |
250 | #define ECHO_CLOCK_BIT_ESYNC96 (1 << ECHO_CLOCK_ESYNC96) | |
251 | #define ECHO_CLOCK_BIT_MTC (1<<ECHO_CLOCK_MTC) | |
252 | ||
253 | ||
254 | /*************************************************************************** | |
255 | ||
256 | Digital modes | |
257 | ||
258 | ****************************************************************************/ | |
259 | ||
260 | /* | |
261 | * Digital modes for Mona, Layla24, and Gina24 | |
262 | */ | |
263 | #define DIGITAL_MODE_NONE 0xFF | |
264 | #define DIGITAL_MODE_SPDIF_RCA 0 | |
265 | #define DIGITAL_MODE_SPDIF_OPTICAL 1 | |
266 | #define DIGITAL_MODE_ADAT 2 | |
267 | #define DIGITAL_MODE_SPDIF_CDROM 3 | |
268 | #define DIGITAL_MODES 4 | |
269 | ||
270 | /* | |
271 | * Digital mode capability masks | |
272 | */ | |
273 | #define ECHOCAPS_HAS_DIGITAL_MODE_SPDIF_RCA (1 << DIGITAL_MODE_SPDIF_RCA) | |
274 | #define ECHOCAPS_HAS_DIGITAL_MODE_SPDIF_OPTICAL (1 << DIGITAL_MODE_SPDIF_OPTICAL) | |
275 | #define ECHOCAPS_HAS_DIGITAL_MODE_ADAT (1 << DIGITAL_MODE_ADAT) | |
276 | #define ECHOCAPS_HAS_DIGITAL_MODE_SPDIF_CDROM (1 << DIGITAL_MODE_SPDIF_CDROM) | |
277 | ||
278 | ||
279 | #define EXT_3GBOX_NC 0x01 /* 3G box not connected */ | |
280 | #define EXT_3GBOX_NOT_SET 0x02 /* 3G box not detected yet */ | |
281 | ||
282 | ||
283 | #define ECHOGAIN_MUTED (-128) /* Minimum possible gain */ | |
284 | #define ECHOGAIN_MINOUT (-128) /* Min output gain (dB) */ | |
285 | #define ECHOGAIN_MAXOUT (6) /* Max output gain (dB) */ | |
286 | #define ECHOGAIN_MININP (-50) /* Min input gain (0.5 dB) */ | |
287 | #define ECHOGAIN_MAXINP (50) /* Max input gain (0.5 dB) */ | |
288 | ||
289 | #define PIPE_STATE_STOPPED 0 /* Pipe has been reset */ | |
290 | #define PIPE_STATE_PAUSED 1 /* Pipe has been stopped */ | |
291 | #define PIPE_STATE_STARTED 2 /* Pipe has been started */ | |
292 | #define PIPE_STATE_PENDING 3 /* Pipe has pending start */ | |
293 | ||
294 | ||
dd7b254d GP |
295 | |
296 | struct audiopipe { | |
2a833a02 | 297 | volatile __le32 *dma_counter; /* Commpage register that contains |
dd7b254d GP |
298 | * the current dma position |
299 | * (lower 32 bits only) | |
300 | */ | |
301 | u32 last_counter; /* The last position, which is used | |
302 | * to compute... | |
303 | */ | |
304 | u32 position; /* ...the number of bytes tranferred | |
305 | * by the DMA engine, modulo the | |
306 | * buffer size | |
307 | */ | |
308 | short index; /* Index of the first channel or <0 | |
309 | * if hw is not configured yet | |
310 | */ | |
311 | short interleave; | |
312 | struct snd_dma_buffer sgpage; /* Room for the scatter-gather list */ | |
313 | struct snd_pcm_hardware hw; | |
314 | struct snd_pcm_hw_constraint_list constr; | |
315 | short sglist_head; | |
316 | char state; /* pipe state */ | |
317 | }; | |
318 | ||
319 | ||
320 | struct audioformat { | |
321 | u8 interleave; /* How the data is arranged in memory: | |
322 | * mono = 1, stereo = 2, ... | |
323 | */ | |
324 | u8 bits_per_sample; /* 8, 16, 24, 32 (24 bits left aligned) */ | |
325 | char mono_to_stereo; /* Only used if interleave is 1 and | |
326 | * if this is an output pipe. | |
327 | */ | |
328 | char data_are_bigendian; /* 1 = big endian, 0 = little endian */ | |
329 | }; | |
330 | ||
331 | ||
332 | struct echoaudio { | |
333 | spinlock_t lock; | |
334 | struct snd_pcm_substream *substream[DSP_MAXPIPES]; | |
335 | int last_period[DSP_MAXPIPES]; | |
befceea9 | 336 | struct mutex mode_mutex; |
dd7b254d GP |
337 | u16 num_digital_modes, digital_mode_list[6]; |
338 | u16 num_clock_sources, clock_source_list[10]; | |
339 | atomic_t opencount; | |
340 | struct snd_kcontrol *clock_src_ctl; | |
341 | struct snd_pcm *analog_pcm, *digital_pcm; | |
342 | struct snd_card *card; | |
343 | const char *card_name; | |
344 | struct pci_dev *pci; | |
345 | unsigned long dsp_registers_phys; | |
346 | struct resource *iores; | |
347 | struct snd_dma_buffer commpage_dma_buf; | |
348 | int irq; | |
349 | #ifdef ECHOCARD_HAS_MIDI | |
350 | struct snd_rawmidi *rmidi; | |
351 | struct snd_rawmidi_substream *midi_in, *midi_out; | |
352 | #endif | |
353 | struct timer_list timer; | |
354 | char tinuse; /* Timer in use */ | |
355 | char midi_full; /* MIDI output buffer is full */ | |
356 | char can_set_rate; | |
357 | char rate_set; | |
358 | ||
359 | /* This stuff is used mainly by the lowlevel code */ | |
360 | struct comm_page *comm_page; /* Virtual address of the memory | |
361 | * seen by DSP | |
362 | */ | |
363 | u32 pipe_alloc_mask; /* Bitmask of allocated pipes */ | |
364 | u32 pipe_cyclic_mask; /* Bitmask of pipes with cyclic | |
365 | * buffers | |
366 | */ | |
367 | u32 sample_rate; /* Card sample rate in Hz */ | |
368 | u8 digital_mode; /* Current digital mode | |
369 | * (see DIGITAL_MODE_*) | |
370 | */ | |
371 | u8 spdif_status; /* Gina20, Darla20, Darla24 - only */ | |
372 | u8 clock_state; /* Gina20, Darla20, Darla24 - only */ | |
373 | u8 input_clock; /* Currently selected sample clock | |
374 | * source | |
375 | */ | |
376 | u8 output_clock; /* Layla20 only */ | |
377 | char meters_enabled; /* VU-meters status */ | |
3f6175ec MB |
378 | char asic_loaded; /* Set true when ASIC loaded */ |
379 | char bad_board; /* Set true if DSP won't load */ | |
dd7b254d GP |
380 | char professional_spdif; /* 0 = consumer; 1 = professional */ |
381 | char non_audio_spdif; /* 3G - only */ | |
382 | char digital_in_automute; /* Gina24, Layla24, Mona - only */ | |
383 | char has_phantom_power; | |
384 | char hasnt_input_nominal_level; /* Gina3G */ | |
385 | char phantom_power; /* Gina3G - only */ | |
386 | char has_midi; | |
387 | char midi_input_enabled; | |
388 | ||
389 | #ifdef ECHOCARD_ECHO3G | |
390 | /* External module -dependent pipe and bus indexes */ | |
391 | char px_digital_out, px_analog_in, px_digital_in, px_num; | |
392 | char bx_digital_out, bx_analog_in, bx_digital_in, bx_num; | |
393 | #endif | |
394 | ||
395 | char nominal_level[ECHO_MAXAUDIOPIPES]; /* True == -10dBV | |
396 | * False == +4dBu */ | |
397 | s8 input_gain[ECHO_MAXAUDIOINPUTS]; /* Input level -50..+50 | |
398 | * unit is 0.5dB */ | |
399 | s8 output_gain[ECHO_MAXAUDIOOUTPUTS]; /* Output level -128..+6 dB | |
400 | * (-128=muted) */ | |
401 | s8 monitor_gain[ECHO_MAXAUDIOOUTPUTS][ECHO_MAXAUDIOINPUTS]; | |
402 | /* -128..+6 dB */ | |
403 | s8 vmixer_gain[ECHO_MAXAUDIOOUTPUTS][ECHO_MAXAUDIOOUTPUTS]; | |
404 | /* -128..+6 dB */ | |
405 | ||
406 | u16 digital_modes; /* Bitmask of supported modes | |
407 | * (see ECHOCAPS_HAS_DIGITAL_MODE_*) */ | |
408 | u16 input_clock_types; /* Suppoted input clock types */ | |
409 | u16 output_clock_types; /* Suppoted output clock types - | |
410 | * Layla20 only */ | |
411 | u16 device_id, subdevice_id; | |
412 | u16 *dsp_code; /* Current DSP code loaded, | |
413 | * NULL if nothing loaded */ | |
19b50063 GP |
414 | short dsp_code_to_load; /* DSP code to load */ |
415 | short asic_code; /* Current ASIC code */ | |
dd7b254d GP |
416 | u32 comm_page_phys; /* Physical address of the |
417 | * memory seen by DSP */ | |
418 | volatile u32 __iomem *dsp_registers; /* DSP's register base */ | |
419 | u32 active_mask; /* Chs. active mask or | |
420 | * punks out */ | |
c7561cd8 | 421 | #ifdef CONFIG_PM_SLEEP |
4f8ada44 GP |
422 | const struct firmware *fw_cache[8]; /* Cached firmwares */ |
423 | #endif | |
dd7b254d GP |
424 | |
425 | #ifdef ECHOCARD_HAS_MIDI | |
426 | u16 mtc_state; /* State for MIDI input parsing state machine */ | |
427 | u8 midi_buffer[MIDI_IN_BUFFER_SIZE]; | |
428 | #endif | |
429 | }; | |
430 | ||
431 | ||
432 | static int init_dsp_comm_page(struct echoaudio *chip); | |
433 | static int init_line_levels(struct echoaudio *chip); | |
434 | static int free_pipes(struct echoaudio *chip, struct audiopipe *pipe); | |
435 | static int load_firmware(struct echoaudio *chip); | |
436 | static int wait_handshake(struct echoaudio *chip); | |
437 | static int send_vector(struct echoaudio *chip, u32 command); | |
438 | static int get_firmware(const struct firmware **fw_entry, | |
19b50063 | 439 | struct echoaudio *chip, const short fw_index); |
e3690869 SM |
440 | static void free_firmware(const struct firmware *fw_entry, |
441 | struct echoaudio *chip); | |
dd7b254d GP |
442 | |
443 | #ifdef ECHOCARD_HAS_MIDI | |
444 | static int enable_midi_input(struct echoaudio *chip, char enable); | |
47b5d028 GP |
445 | static void snd_echo_midi_output_trigger( |
446 | struct snd_rawmidi_substream *substream, int up); | |
dd7b254d | 447 | static int midi_service_irq(struct echoaudio *chip); |
e23e7a14 BP |
448 | static int snd_echo_midi_create(struct snd_card *card, |
449 | struct echoaudio *chip); | |
dd7b254d GP |
450 | #endif |
451 | ||
452 | ||
453 | static inline void clear_handshake(struct echoaudio *chip) | |
454 | { | |
455 | chip->comm_page->handshake = 0; | |
456 | } | |
457 | ||
458 | static inline u32 get_dsp_register(struct echoaudio *chip, u32 index) | |
459 | { | |
460 | return readl(&chip->dsp_registers[index]); | |
461 | } | |
462 | ||
463 | static inline void set_dsp_register(struct echoaudio *chip, u32 index, | |
464 | u32 value) | |
465 | { | |
466 | writel(value, &chip->dsp_registers[index]); | |
467 | } | |
468 | ||
469 | ||
470 | /* Pipe and bus indexes. PX_* and BX_* are defined as chip->px_* and chip->bx_* | |
471 | for 3G cards because they depend on the external box. They are integer | |
472 | constants for all other cards. | |
473 | Never use those defines directly, use the following functions instead. */ | |
474 | ||
475 | static inline int px_digital_out(const struct echoaudio *chip) | |
476 | { | |
477 | return PX_DIGITAL_OUT; | |
478 | } | |
479 | ||
480 | static inline int px_analog_in(const struct echoaudio *chip) | |
481 | { | |
482 | return PX_ANALOG_IN; | |
483 | } | |
484 | ||
485 | static inline int px_digital_in(const struct echoaudio *chip) | |
486 | { | |
487 | return PX_DIGITAL_IN; | |
488 | } | |
489 | ||
490 | static inline int px_num(const struct echoaudio *chip) | |
491 | { | |
492 | return PX_NUM; | |
493 | } | |
494 | ||
495 | static inline int bx_digital_out(const struct echoaudio *chip) | |
496 | { | |
497 | return BX_DIGITAL_OUT; | |
498 | } | |
499 | ||
500 | static inline int bx_analog_in(const struct echoaudio *chip) | |
501 | { | |
502 | return BX_ANALOG_IN; | |
503 | } | |
504 | ||
505 | static inline int bx_digital_in(const struct echoaudio *chip) | |
506 | { | |
507 | return BX_DIGITAL_IN; | |
508 | } | |
509 | ||
510 | static inline int bx_num(const struct echoaudio *chip) | |
511 | { | |
512 | return BX_NUM; | |
513 | } | |
514 | ||
515 | static inline int num_pipes_out(const struct echoaudio *chip) | |
516 | { | |
517 | return px_analog_in(chip); | |
518 | } | |
519 | ||
520 | static inline int num_pipes_in(const struct echoaudio *chip) | |
521 | { | |
522 | return px_num(chip) - px_analog_in(chip); | |
523 | } | |
524 | ||
525 | static inline int num_busses_out(const struct echoaudio *chip) | |
526 | { | |
527 | return bx_analog_in(chip); | |
528 | } | |
529 | ||
530 | static inline int num_busses_in(const struct echoaudio *chip) | |
531 | { | |
532 | return bx_num(chip) - bx_analog_in(chip); | |
533 | } | |
534 | ||
535 | static inline int num_analog_busses_out(const struct echoaudio *chip) | |
536 | { | |
537 | return bx_digital_out(chip); | |
538 | } | |
539 | ||
540 | static inline int num_analog_busses_in(const struct echoaudio *chip) | |
541 | { | |
542 | return bx_digital_in(chip) - bx_analog_in(chip); | |
543 | } | |
544 | ||
545 | static inline int num_digital_busses_out(const struct echoaudio *chip) | |
546 | { | |
547 | return num_busses_out(chip) - num_analog_busses_out(chip); | |
548 | } | |
549 | ||
550 | static inline int num_digital_busses_in(const struct echoaudio *chip) | |
551 | { | |
552 | return num_busses_in(chip) - num_analog_busses_in(chip); | |
553 | } | |
554 | ||
555 | /* The monitor array is a one-dimensional array; compute the offset | |
556 | * into the array */ | |
557 | static inline int monitor_index(const struct echoaudio *chip, int out, int in) | |
558 | { | |
559 | return out * num_busses_in(chip) + in; | |
560 | } | |
561 | ||
dd7b254d | 562 | #endif /* _ECHOAUDIO_H_ */ |