Commit | Line | Data |
---|---|---|
f3d9478b JB |
1 | /* |
2 | * i2sbus driver -- pcm routines | |
3 | * | |
4 | * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> | |
5 | * | |
6 | * GPL v2, can be found in COPYING. | |
7 | */ | |
8 | ||
9 | #include <asm/io.h> | |
10 | #include <linux/delay.h> | |
f3d9478b JB |
11 | #include <sound/core.h> |
12 | #include <asm/macio.h> | |
13 | #include <linux/pci.h> | |
14 | #include "../soundbus.h" | |
15 | #include "i2sbus.h" | |
16 | ||
17 | static inline void get_pcm_info(struct i2sbus_dev *i2sdev, int in, | |
18 | struct pcm_info **pi, struct pcm_info **other) | |
19 | { | |
20 | if (in) { | |
21 | if (pi) | |
22 | *pi = &i2sdev->in; | |
23 | if (other) | |
24 | *other = &i2sdev->out; | |
25 | } else { | |
26 | if (pi) | |
27 | *pi = &i2sdev->out; | |
28 | if (other) | |
29 | *other = &i2sdev->in; | |
30 | } | |
31 | } | |
32 | ||
33 | static int clock_and_divisors(int mclk, int sclk, int rate, int *out) | |
34 | { | |
35 | /* sclk must be derived from mclk! */ | |
36 | if (mclk % sclk) | |
37 | return -1; | |
38 | /* derive sclk register value */ | |
39 | if (i2s_sf_sclkdiv(mclk / sclk, out)) | |
40 | return -1; | |
41 | ||
42 | if (I2S_CLOCK_SPEED_18MHz % (rate * mclk) == 0) { | |
43 | if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_18MHz / (rate * mclk), out)) { | |
44 | *out |= I2S_SF_CLOCK_SOURCE_18MHz; | |
45 | return 0; | |
46 | } | |
47 | } | |
48 | if (I2S_CLOCK_SPEED_45MHz % (rate * mclk) == 0) { | |
49 | if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_45MHz / (rate * mclk), out)) { | |
50 | *out |= I2S_SF_CLOCK_SOURCE_45MHz; | |
51 | return 0; | |
52 | } | |
53 | } | |
54 | if (I2S_CLOCK_SPEED_49MHz % (rate * mclk) == 0) { | |
55 | if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_49MHz / (rate * mclk), out)) { | |
56 | *out |= I2S_SF_CLOCK_SOURCE_49MHz; | |
57 | return 0; | |
58 | } | |
59 | } | |
60 | return -1; | |
61 | } | |
62 | ||
63 | #define CHECK_RATE(rate) \ | |
64 | do { if (rates & SNDRV_PCM_RATE_ ##rate) { \ | |
65 | int dummy; \ | |
66 | if (clock_and_divisors(sysclock_factor, \ | |
67 | bus_factor, rate, &dummy)) \ | |
68 | rates &= ~SNDRV_PCM_RATE_ ##rate; \ | |
69 | } } while (0) | |
70 | ||
71 | static int i2sbus_pcm_open(struct i2sbus_dev *i2sdev, int in) | |
72 | { | |
73 | struct pcm_info *pi, *other; | |
74 | struct soundbus_dev *sdev; | |
75 | int masks_inited = 0, err; | |
76 | struct codec_info_item *cii, *rev; | |
77 | struct snd_pcm_hardware *hw; | |
78 | u64 formats = 0; | |
79 | unsigned int rates = 0; | |
80 | struct transfer_info v; | |
81 | int result = 0; | |
82 | int bus_factor = 0, sysclock_factor = 0; | |
83 | int found_this; | |
84 | ||
85 | mutex_lock(&i2sdev->lock); | |
86 | ||
87 | get_pcm_info(i2sdev, in, &pi, &other); | |
88 | ||
89 | hw = &pi->substream->runtime->hw; | |
90 | sdev = &i2sdev->sound; | |
91 | ||
92 | if (pi->active) { | |
93 | /* alsa messed up */ | |
94 | result = -EBUSY; | |
95 | goto out_unlock; | |
96 | } | |
97 | ||
98 | /* we now need to assign the hw */ | |
99 | list_for_each_entry(cii, &sdev->codec_list, list) { | |
100 | struct transfer_info *ti = cii->codec->transfers; | |
101 | bus_factor = cii->codec->bus_factor; | |
102 | sysclock_factor = cii->codec->sysclock_factor; | |
103 | while (ti->formats && ti->rates) { | |
104 | v = *ti; | |
105 | if (ti->transfer_in == in | |
106 | && cii->codec->usable(cii, ti, &v)) { | |
107 | if (masks_inited) { | |
108 | formats &= v.formats; | |
109 | rates &= v.rates; | |
110 | } else { | |
111 | formats = v.formats; | |
112 | rates = v.rates; | |
113 | masks_inited = 1; | |
114 | } | |
115 | } | |
116 | ti++; | |
117 | } | |
118 | } | |
119 | if (!masks_inited || !bus_factor || !sysclock_factor) { | |
120 | result = -ENODEV; | |
121 | goto out_unlock; | |
122 | } | |
123 | /* bus dependent stuff */ | |
124 | hw->info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | | |
547ac2ae PM |
125 | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_RESUME | |
126 | SNDRV_PCM_INFO_JOINT_DUPLEX; | |
f3d9478b JB |
127 | |
128 | CHECK_RATE(5512); | |
129 | CHECK_RATE(8000); | |
130 | CHECK_RATE(11025); | |
131 | CHECK_RATE(16000); | |
132 | CHECK_RATE(22050); | |
133 | CHECK_RATE(32000); | |
134 | CHECK_RATE(44100); | |
135 | CHECK_RATE(48000); | |
136 | CHECK_RATE(64000); | |
137 | CHECK_RATE(88200); | |
138 | CHECK_RATE(96000); | |
139 | CHECK_RATE(176400); | |
140 | CHECK_RATE(192000); | |
141 | hw->rates = rates; | |
142 | ||
143 | /* well. the codec might want 24 bits only, and we'll | |
144 | * ever only transfer 24 bits, but they are top-aligned! | |
145 | * So for alsa, we claim that we're doing full 32 bit | |
146 | * while in reality we'll ignore the lower 8 bits of | |
147 | * that when doing playback (they're transferred as 0 | |
148 | * as far as I know, no codecs we have are 32-bit capable | |
149 | * so I can't really test) and when doing recording we'll | |
150 | * always have those lower 8 bits recorded as 0 */ | |
151 | if (formats & SNDRV_PCM_FMTBIT_S24_BE) | |
152 | formats |= SNDRV_PCM_FMTBIT_S32_BE; | |
153 | if (formats & SNDRV_PCM_FMTBIT_U24_BE) | |
154 | formats |= SNDRV_PCM_FMTBIT_U32_BE; | |
155 | /* now mask off what we can support. I suppose we could | |
156 | * also support S24_3LE and some similar formats, but I | |
157 | * doubt there's a codec that would be able to use that, | |
158 | * so we don't support it here. */ | |
159 | hw->formats = formats & (SNDRV_PCM_FMTBIT_S16_BE | | |
160 | SNDRV_PCM_FMTBIT_U16_BE | | |
161 | SNDRV_PCM_FMTBIT_S32_BE | | |
162 | SNDRV_PCM_FMTBIT_U32_BE); | |
163 | ||
164 | /* we need to set the highest and lowest rate possible. | |
165 | * These are the highest and lowest rates alsa can | |
166 | * support properly in its bitfield. | |
167 | * Below, we'll use that to restrict to the rate | |
168 | * currently in use (if any). */ | |
169 | hw->rate_min = 5512; | |
170 | hw->rate_max = 192000; | |
171 | /* if the other stream is active, then we can only | |
172 | * support what it is currently using. | |
173 | * FIXME: I lied. This comment is wrong. We can support | |
174 | * anything that works with the same serial format, ie. | |
175 | * when recording 24 bit sound we can well play 16 bit | |
176 | * sound at the same time iff using the same transfer mode. | |
177 | */ | |
178 | if (other->active) { | |
179 | /* FIXME: is this guaranteed by the alsa api? */ | |
180 | hw->formats &= (1ULL << i2sdev->format); | |
181 | /* see above, restrict rates to the one we already have */ | |
182 | hw->rate_min = i2sdev->rate; | |
183 | hw->rate_max = i2sdev->rate; | |
184 | } | |
185 | ||
186 | hw->channels_min = 2; | |
187 | hw->channels_max = 2; | |
188 | /* these are somewhat arbitrary */ | |
189 | hw->buffer_bytes_max = 131072; | |
190 | hw->period_bytes_min = 256; | |
191 | hw->period_bytes_max = 16384; | |
192 | hw->periods_min = 3; | |
193 | hw->periods_max = MAX_DBDMA_COMMANDS; | |
df86d114 HL |
194 | err = snd_pcm_hw_constraint_integer(pi->substream->runtime, |
195 | SNDRV_PCM_HW_PARAM_PERIODS); | |
196 | if (err < 0) { | |
197 | result = err; | |
198 | goto out_unlock; | |
199 | } | |
f3d9478b JB |
200 | list_for_each_entry(cii, &sdev->codec_list, list) { |
201 | if (cii->codec->open) { | |
202 | err = cii->codec->open(cii, pi->substream); | |
203 | if (err) { | |
204 | result = err; | |
205 | /* unwind */ | |
206 | found_this = 0; | |
207 | list_for_each_entry_reverse(rev, | |
208 | &sdev->codec_list, list) { | |
209 | if (found_this && rev->codec->close) { | |
210 | rev->codec->close(rev, | |
211 | pi->substream); | |
212 | } | |
213 | if (rev == cii) | |
214 | found_this = 1; | |
215 | } | |
216 | goto out_unlock; | |
217 | } | |
218 | } | |
219 | } | |
220 | ||
221 | out_unlock: | |
222 | mutex_unlock(&i2sdev->lock); | |
223 | return result; | |
224 | } | |
225 | ||
226 | #undef CHECK_RATE | |
227 | ||
228 | static int i2sbus_pcm_close(struct i2sbus_dev *i2sdev, int in) | |
229 | { | |
230 | struct codec_info_item *cii; | |
231 | struct pcm_info *pi; | |
232 | int err = 0, tmp; | |
233 | ||
234 | mutex_lock(&i2sdev->lock); | |
235 | ||
236 | get_pcm_info(i2sdev, in, &pi, NULL); | |
237 | ||
238 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { | |
239 | if (cii->codec->close) { | |
240 | tmp = cii->codec->close(cii, pi->substream); | |
241 | if (tmp) | |
242 | err = tmp; | |
243 | } | |
244 | } | |
245 | ||
246 | pi->substream = NULL; | |
247 | pi->active = 0; | |
248 | mutex_unlock(&i2sdev->lock); | |
249 | return err; | |
250 | } | |
251 | ||
547ac2ae PM |
252 | static void i2sbus_wait_for_stop(struct i2sbus_dev *i2sdev, |
253 | struct pcm_info *pi) | |
254 | { | |
255 | unsigned long flags; | |
256 | struct completion done; | |
257 | long timeout; | |
258 | ||
259 | spin_lock_irqsave(&i2sdev->low_lock, flags); | |
260 | if (pi->dbdma_ring.stopping) { | |
261 | init_completion(&done); | |
262 | pi->stop_completion = &done; | |
263 | spin_unlock_irqrestore(&i2sdev->low_lock, flags); | |
264 | timeout = wait_for_completion_timeout(&done, HZ); | |
265 | spin_lock_irqsave(&i2sdev->low_lock, flags); | |
266 | pi->stop_completion = NULL; | |
267 | if (timeout == 0) { | |
268 | /* timeout expired, stop dbdma forcefully */ | |
269 | printk(KERN_ERR "i2sbus_wait_for_stop: timed out\n"); | |
270 | /* make sure RUN, PAUSE and S0 bits are cleared */ | |
271 | out_le32(&pi->dbdma->control, (RUN | PAUSE | 1) << 16); | |
272 | pi->dbdma_ring.stopping = 0; | |
273 | timeout = 10; | |
274 | while (in_le32(&pi->dbdma->status) & ACTIVE) { | |
275 | if (--timeout <= 0) | |
276 | break; | |
277 | udelay(1); | |
278 | } | |
279 | } | |
280 | } | |
281 | spin_unlock_irqrestore(&i2sdev->low_lock, flags); | |
282 | } | |
283 | ||
284 | #ifdef CONFIG_PM | |
285 | void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev) | |
286 | { | |
287 | struct pcm_info *pi; | |
288 | ||
289 | get_pcm_info(i2sdev, 0, &pi, NULL); | |
290 | i2sbus_wait_for_stop(i2sdev, pi); | |
291 | get_pcm_info(i2sdev, 1, &pi, NULL); | |
292 | i2sbus_wait_for_stop(i2sdev, pi); | |
293 | } | |
294 | #endif | |
295 | ||
f3d9478b JB |
296 | static int i2sbus_hw_params(struct snd_pcm_substream *substream, |
297 | struct snd_pcm_hw_params *params) | |
298 | { | |
299 | return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); | |
300 | } | |
301 | ||
547ac2ae | 302 | static inline int i2sbus_hw_free(struct snd_pcm_substream *substream, int in) |
f3d9478b | 303 | { |
547ac2ae PM |
304 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); |
305 | struct pcm_info *pi; | |
306 | ||
307 | get_pcm_info(i2sdev, in, &pi, NULL); | |
308 | if (pi->dbdma_ring.stopping) | |
309 | i2sbus_wait_for_stop(i2sdev, pi); | |
f3d9478b JB |
310 | snd_pcm_lib_free_pages(substream); |
311 | return 0; | |
312 | } | |
313 | ||
547ac2ae PM |
314 | static int i2sbus_playback_hw_free(struct snd_pcm_substream *substream) |
315 | { | |
316 | return i2sbus_hw_free(substream, 0); | |
317 | } | |
318 | ||
319 | static int i2sbus_record_hw_free(struct snd_pcm_substream *substream) | |
320 | { | |
321 | return i2sbus_hw_free(substream, 1); | |
322 | } | |
323 | ||
f3d9478b JB |
324 | static int i2sbus_pcm_prepare(struct i2sbus_dev *i2sdev, int in) |
325 | { | |
326 | /* whee. Hard work now. The user has selected a bitrate | |
327 | * and bit format, so now we have to program our | |
328 | * I2S controller appropriately. */ | |
329 | struct snd_pcm_runtime *runtime; | |
330 | struct dbdma_cmd *command; | |
547ac2ae | 331 | int i, periodsize, nperiods; |
f3d9478b JB |
332 | dma_addr_t offset; |
333 | struct bus_info bi; | |
334 | struct codec_info_item *cii; | |
335 | int sfr = 0; /* serial format register */ | |
336 | int dws = 0; /* data word sizes reg */ | |
337 | int input_16bit; | |
338 | struct pcm_info *pi, *other; | |
339 | int cnt; | |
340 | int result = 0; | |
547ac2ae | 341 | unsigned int cmd, stopaddr; |
f3d9478b JB |
342 | |
343 | mutex_lock(&i2sdev->lock); | |
344 | ||
345 | get_pcm_info(i2sdev, in, &pi, &other); | |
346 | ||
347 | if (pi->dbdma_ring.running) { | |
348 | result = -EBUSY; | |
349 | goto out_unlock; | |
350 | } | |
547ac2ae PM |
351 | if (pi->dbdma_ring.stopping) |
352 | i2sbus_wait_for_stop(i2sdev, pi); | |
353 | ||
354 | if (!pi->substream || !pi->substream->runtime) { | |
355 | result = -EINVAL; | |
356 | goto out_unlock; | |
357 | } | |
f3d9478b JB |
358 | |
359 | runtime = pi->substream->runtime; | |
360 | pi->active = 1; | |
361 | if (other->active && | |
362 | ((i2sdev->format != runtime->format) | |
363 | || (i2sdev->rate != runtime->rate))) { | |
364 | result = -EINVAL; | |
365 | goto out_unlock; | |
366 | } | |
367 | ||
368 | i2sdev->format = runtime->format; | |
369 | i2sdev->rate = runtime->rate; | |
370 | ||
371 | periodsize = snd_pcm_lib_period_bytes(pi->substream); | |
547ac2ae | 372 | nperiods = pi->substream->runtime->periods; |
f3d9478b JB |
373 | pi->current_period = 0; |
374 | ||
375 | /* generate dbdma command ring first */ | |
376 | command = pi->dbdma_ring.cmds; | |
547ac2ae PM |
377 | memset(command, 0, (nperiods + 2) * sizeof(struct dbdma_cmd)); |
378 | ||
379 | /* commands to DMA to/from the ring */ | |
380 | /* | |
381 | * For input, we need to do a graceful stop; if we abort | |
382 | * the DMA, we end up with leftover bytes that corrupt | |
383 | * the next recording. To do this we set the S0 status | |
384 | * bit and wait for the DMA controller to stop. Each | |
385 | * command has a branch condition to | |
386 | * make it branch to a stop command if S0 is set. | |
387 | * On input we also need to wait for the S7 bit to be | |
388 | * set before turning off the DMA controller. | |
389 | * In fact we do the graceful stop for output as well. | |
390 | */ | |
f3d9478b | 391 | offset = runtime->dma_addr; |
547ac2ae PM |
392 | cmd = (in? INPUT_MORE: OUTPUT_MORE) | BR_IFSET | INTR_ALWAYS; |
393 | stopaddr = pi->dbdma_ring.bus_cmd_start + | |
394 | (nperiods + 1) * sizeof(struct dbdma_cmd); | |
395 | for (i = 0; i < nperiods; i++, command++, offset += periodsize) { | |
396 | command->command = cpu_to_le16(cmd); | |
397 | command->cmd_dep = cpu_to_le32(stopaddr); | |
f3d9478b JB |
398 | command->phy_addr = cpu_to_le32(offset); |
399 | command->req_count = cpu_to_le16(periodsize); | |
f3d9478b | 400 | } |
547ac2ae PM |
401 | |
402 | /* branch back to beginning of ring */ | |
403 | command->command = cpu_to_le16(DBDMA_NOP | BR_ALWAYS); | |
f3d9478b | 404 | command->cmd_dep = cpu_to_le32(pi->dbdma_ring.bus_cmd_start); |
547ac2ae PM |
405 | command++; |
406 | ||
407 | /* set stop command */ | |
408 | command->command = cpu_to_le16(DBDMA_STOP); | |
f3d9478b JB |
409 | |
410 | /* ok, let's set the serial format and stuff */ | |
411 | switch (runtime->format) { | |
412 | /* 16 bit formats */ | |
413 | case SNDRV_PCM_FORMAT_S16_BE: | |
414 | case SNDRV_PCM_FORMAT_U16_BE: | |
415 | /* FIXME: if we add different bus factors we need to | |
416 | * do more here!! */ | |
417 | bi.bus_factor = 0; | |
418 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { | |
419 | bi.bus_factor = cii->codec->bus_factor; | |
420 | break; | |
421 | } | |
422 | if (!bi.bus_factor) { | |
423 | result = -ENODEV; | |
424 | goto out_unlock; | |
425 | } | |
426 | input_16bit = 1; | |
427 | break; | |
428 | case SNDRV_PCM_FORMAT_S32_BE: | |
429 | case SNDRV_PCM_FORMAT_U32_BE: | |
430 | /* force 64x bus speed, otherwise the data cannot be | |
431 | * transferred quickly enough! */ | |
432 | bi.bus_factor = 64; | |
433 | input_16bit = 0; | |
434 | break; | |
435 | default: | |
436 | result = -EINVAL; | |
437 | goto out_unlock; | |
438 | } | |
439 | /* we assume all sysclocks are the same! */ | |
440 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { | |
441 | bi.sysclock_factor = cii->codec->sysclock_factor; | |
442 | break; | |
443 | } | |
444 | ||
445 | if (clock_and_divisors(bi.sysclock_factor, | |
446 | bi.bus_factor, | |
447 | runtime->rate, | |
448 | &sfr) < 0) { | |
449 | result = -EINVAL; | |
450 | goto out_unlock; | |
451 | } | |
452 | switch (bi.bus_factor) { | |
453 | case 32: | |
454 | sfr |= I2S_SF_SERIAL_FORMAT_I2S_32X; | |
455 | break; | |
456 | case 64: | |
457 | sfr |= I2S_SF_SERIAL_FORMAT_I2S_64X; | |
458 | break; | |
459 | } | |
460 | /* FIXME: THIS ASSUMES MASTER ALL THE TIME */ | |
461 | sfr |= I2S_SF_SCLK_MASTER; | |
462 | ||
463 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { | |
464 | int err = 0; | |
465 | if (cii->codec->prepare) | |
466 | err = cii->codec->prepare(cii, &bi, pi->substream); | |
467 | if (err) { | |
468 | result = err; | |
469 | goto out_unlock; | |
470 | } | |
471 | } | |
472 | /* codecs are fine with it, so set our clocks */ | |
473 | if (input_16bit) | |
474 | dws = (2 << I2S_DWS_NUM_CHANNELS_IN_SHIFT) | | |
475 | (2 << I2S_DWS_NUM_CHANNELS_OUT_SHIFT) | | |
476 | I2S_DWS_DATA_IN_16BIT | I2S_DWS_DATA_OUT_16BIT; | |
477 | else | |
478 | dws = (2 << I2S_DWS_NUM_CHANNELS_IN_SHIFT) | | |
479 | (2 << I2S_DWS_NUM_CHANNELS_OUT_SHIFT) | | |
480 | I2S_DWS_DATA_IN_24BIT | I2S_DWS_DATA_OUT_24BIT; | |
481 | ||
482 | /* early exit if already programmed correctly */ | |
483 | /* not locking these is fine since we touch them only in this function */ | |
484 | if (in_le32(&i2sdev->intfregs->serial_format) == sfr | |
485 | && in_le32(&i2sdev->intfregs->data_word_sizes) == dws) | |
486 | goto out_unlock; | |
487 | ||
488 | /* let's notify the codecs about clocks going away. | |
489 | * For now we only do mastering on the i2s cell... */ | |
490 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) | |
491 | if (cii->codec->switch_clock) | |
492 | cii->codec->switch_clock(cii, CLOCK_SWITCH_PREPARE_SLAVE); | |
493 | ||
494 | i2sbus_control_enable(i2sdev->control, i2sdev); | |
495 | i2sbus_control_cell(i2sdev->control, i2sdev, 1); | |
496 | ||
497 | out_le32(&i2sdev->intfregs->intr_ctl, I2S_PENDING_CLOCKS_STOPPED); | |
498 | ||
499 | i2sbus_control_clock(i2sdev->control, i2sdev, 0); | |
500 | ||
501 | msleep(1); | |
502 | ||
503 | /* wait for clock stopped. This can apparently take a while... */ | |
504 | cnt = 100; | |
505 | while (cnt-- && | |
506 | !(in_le32(&i2sdev->intfregs->intr_ctl) & I2S_PENDING_CLOCKS_STOPPED)) { | |
507 | msleep(5); | |
508 | } | |
509 | out_le32(&i2sdev->intfregs->intr_ctl, I2S_PENDING_CLOCKS_STOPPED); | |
510 | ||
511 | /* not locking these is fine since we touch them only in this function */ | |
512 | out_le32(&i2sdev->intfregs->serial_format, sfr); | |
513 | out_le32(&i2sdev->intfregs->data_word_sizes, dws); | |
514 | ||
515 | i2sbus_control_enable(i2sdev->control, i2sdev); | |
516 | i2sbus_control_cell(i2sdev->control, i2sdev, 1); | |
517 | i2sbus_control_clock(i2sdev->control, i2sdev, 1); | |
518 | msleep(1); | |
519 | ||
520 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) | |
521 | if (cii->codec->switch_clock) | |
522 | cii->codec->switch_clock(cii, CLOCK_SWITCH_SLAVE); | |
523 | ||
524 | out_unlock: | |
525 | mutex_unlock(&i2sdev->lock); | |
526 | return result; | |
527 | } | |
528 | ||
547ac2ae PM |
529 | #ifdef CONFIG_PM |
530 | void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev) | |
531 | { | |
532 | i2sbus_pcm_prepare(i2sdev, 0); | |
533 | i2sbus_pcm_prepare(i2sdev, 1); | |
534 | } | |
535 | #endif | |
f3d9478b JB |
536 | |
537 | static int i2sbus_pcm_trigger(struct i2sbus_dev *i2sdev, int in, int cmd) | |
538 | { | |
539 | struct codec_info_item *cii; | |
540 | struct pcm_info *pi; | |
f3d9478b JB |
541 | int result = 0; |
542 | unsigned long flags; | |
543 | ||
544 | spin_lock_irqsave(&i2sdev->low_lock, flags); | |
545 | ||
546 | get_pcm_info(i2sdev, in, &pi, NULL); | |
547 | ||
548 | switch (cmd) { | |
549 | case SNDRV_PCM_TRIGGER_START: | |
550 | case SNDRV_PCM_TRIGGER_RESUME: | |
551 | if (pi->dbdma_ring.running) { | |
552 | result = -EALREADY; | |
553 | goto out_unlock; | |
554 | } | |
555 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) | |
556 | if (cii->codec->start) | |
557 | cii->codec->start(cii, pi->substream); | |
558 | pi->dbdma_ring.running = 1; | |
559 | ||
547ac2ae PM |
560 | if (pi->dbdma_ring.stopping) { |
561 | /* Clear the S0 bit, then see if we stopped yet */ | |
562 | out_le32(&pi->dbdma->control, 1 << 16); | |
563 | if (in_le32(&pi->dbdma->status) & ACTIVE) { | |
564 | /* possible race here? */ | |
565 | udelay(10); | |
566 | if (in_le32(&pi->dbdma->status) & ACTIVE) { | |
567 | pi->dbdma_ring.stopping = 0; | |
568 | goto out_unlock; /* keep running */ | |
569 | } | |
570 | } | |
f3d9478b JB |
571 | } |
572 | ||
547ac2ae PM |
573 | /* make sure RUN, PAUSE and S0 bits are cleared */ |
574 | out_le32(&pi->dbdma->control, (RUN | PAUSE | 1) << 16); | |
575 | ||
576 | /* set branch condition select register */ | |
577 | out_le32(&pi->dbdma->br_sel, (1 << 16) | 1); | |
578 | ||
f3d9478b JB |
579 | /* write dma command buffer address to the dbdma chip */ |
580 | out_le32(&pi->dbdma->cmdptr, pi->dbdma_ring.bus_cmd_start); | |
f3d9478b | 581 | |
547ac2ae PM |
582 | /* initialize the frame count and current period */ |
583 | pi->current_period = 0; | |
f3d9478b JB |
584 | pi->frame_count = in_le32(&i2sdev->intfregs->frame_count); |
585 | ||
547ac2ae PM |
586 | /* set the DMA controller running */ |
587 | out_le32(&pi->dbdma->control, (RUN << 16) | RUN); | |
588 | ||
f3d9478b JB |
589 | /* off you go! */ |
590 | break; | |
547ac2ae | 591 | |
f3d9478b JB |
592 | case SNDRV_PCM_TRIGGER_STOP: |
593 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
594 | if (!pi->dbdma_ring.running) { | |
595 | result = -EALREADY; | |
596 | goto out_unlock; | |
597 | } | |
547ac2ae | 598 | pi->dbdma_ring.running = 0; |
f3d9478b | 599 | |
547ac2ae PM |
600 | /* Set the S0 bit to make the DMA branch to the stop cmd */ |
601 | out_le32(&pi->dbdma->control, (1 << 16) | 1); | |
602 | pi->dbdma_ring.stopping = 1; | |
f3d9478b | 603 | |
f3d9478b JB |
604 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) |
605 | if (cii->codec->stop) | |
606 | cii->codec->stop(cii, pi->substream); | |
607 | break; | |
608 | default: | |
609 | result = -EINVAL; | |
610 | goto out_unlock; | |
611 | } | |
612 | ||
613 | out_unlock: | |
614 | spin_unlock_irqrestore(&i2sdev->low_lock, flags); | |
615 | return result; | |
616 | } | |
617 | ||
618 | static snd_pcm_uframes_t i2sbus_pcm_pointer(struct i2sbus_dev *i2sdev, int in) | |
619 | { | |
620 | struct pcm_info *pi; | |
621 | u32 fc; | |
622 | ||
623 | get_pcm_info(i2sdev, in, &pi, NULL); | |
624 | ||
625 | fc = in_le32(&i2sdev->intfregs->frame_count); | |
626 | fc = fc - pi->frame_count; | |
627 | ||
547ac2ae PM |
628 | if (fc >= pi->substream->runtime->buffer_size) |
629 | fc %= pi->substream->runtime->buffer_size; | |
630 | return fc; | |
f3d9478b JB |
631 | } |
632 | ||
633 | static inline void handle_interrupt(struct i2sbus_dev *i2sdev, int in) | |
634 | { | |
635 | struct pcm_info *pi; | |
547ac2ae PM |
636 | u32 fc, nframes; |
637 | u32 status; | |
638 | int timeout, i; | |
639 | int dma_stopped = 0; | |
640 | struct snd_pcm_runtime *runtime; | |
f3d9478b JB |
641 | |
642 | spin_lock(&i2sdev->low_lock); | |
643 | get_pcm_info(i2sdev, in, &pi, NULL); | |
547ac2ae | 644 | if (!pi->dbdma_ring.running && !pi->dbdma_ring.stopping) |
f3d9478b | 645 | goto out_unlock; |
f3d9478b | 646 | |
547ac2ae PM |
647 | i = pi->current_period; |
648 | runtime = pi->substream->runtime; | |
649 | while (pi->dbdma_ring.cmds[i].xfer_status) { | |
650 | if (le16_to_cpu(pi->dbdma_ring.cmds[i].xfer_status) & BT) | |
651 | /* | |
652 | * BT is the branch taken bit. If it took a branch | |
653 | * it is because we set the S0 bit to make it | |
654 | * branch to the stop command. | |
655 | */ | |
656 | dma_stopped = 1; | |
657 | pi->dbdma_ring.cmds[i].xfer_status = 0; | |
658 | ||
659 | if (++i >= runtime->periods) { | |
660 | i = 0; | |
661 | pi->frame_count += runtime->buffer_size; | |
662 | } | |
663 | pi->current_period = i; | |
664 | ||
665 | /* | |
666 | * Check the frame count. The DMA tends to get a bit | |
667 | * ahead of the frame counter, which confuses the core. | |
668 | */ | |
669 | fc = in_le32(&i2sdev->intfregs->frame_count); | |
670 | nframes = i * runtime->period_size; | |
671 | if (fc < pi->frame_count + nframes) | |
672 | pi->frame_count = fc - nframes; | |
f3d9478b JB |
673 | } |
674 | ||
547ac2ae PM |
675 | if (dma_stopped) { |
676 | timeout = 1000; | |
677 | for (;;) { | |
678 | status = in_le32(&pi->dbdma->status); | |
679 | if (!(status & ACTIVE) && (!in || (status & 0x80))) | |
680 | break; | |
681 | if (--timeout <= 0) { | |
682 | printk(KERN_ERR "i2sbus: timed out " | |
683 | "waiting for DMA to stop!\n"); | |
684 | break; | |
685 | } | |
686 | udelay(1); | |
f3d9478b | 687 | } |
f3d9478b | 688 | |
547ac2ae PM |
689 | /* Turn off DMA controller, clear S0 bit */ |
690 | out_le32(&pi->dbdma->control, (RUN | PAUSE | 1) << 16); | |
f3d9478b | 691 | |
547ac2ae PM |
692 | pi->dbdma_ring.stopping = 0; |
693 | if (pi->stop_completion) | |
694 | complete(pi->stop_completion); | |
695 | } | |
696 | ||
697 | if (!pi->dbdma_ring.running) | |
698 | goto out_unlock; | |
f3d9478b JB |
699 | spin_unlock(&i2sdev->low_lock); |
700 | /* may call _trigger again, hence needs to be unlocked */ | |
701 | snd_pcm_period_elapsed(pi->substream); | |
702 | return; | |
547ac2ae | 703 | |
f3d9478b JB |
704 | out_unlock: |
705 | spin_unlock(&i2sdev->low_lock); | |
706 | } | |
707 | ||
7d12e780 | 708 | irqreturn_t i2sbus_tx_intr(int irq, void *devid) |
f3d9478b JB |
709 | { |
710 | handle_interrupt((struct i2sbus_dev *)devid, 0); | |
711 | return IRQ_HANDLED; | |
712 | } | |
713 | ||
7d12e780 | 714 | irqreturn_t i2sbus_rx_intr(int irq, void *devid) |
f3d9478b JB |
715 | { |
716 | handle_interrupt((struct i2sbus_dev *)devid, 1); | |
717 | return IRQ_HANDLED; | |
718 | } | |
719 | ||
720 | static int i2sbus_playback_open(struct snd_pcm_substream *substream) | |
721 | { | |
722 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
723 | ||
724 | if (!i2sdev) | |
725 | return -EINVAL; | |
726 | i2sdev->out.substream = substream; | |
727 | return i2sbus_pcm_open(i2sdev, 0); | |
728 | } | |
729 | ||
730 | static int i2sbus_playback_close(struct snd_pcm_substream *substream) | |
731 | { | |
732 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
733 | int err; | |
734 | ||
735 | if (!i2sdev) | |
736 | return -EINVAL; | |
737 | if (i2sdev->out.substream != substream) | |
738 | return -EINVAL; | |
739 | err = i2sbus_pcm_close(i2sdev, 0); | |
740 | if (!err) | |
741 | i2sdev->out.substream = NULL; | |
742 | return err; | |
743 | } | |
744 | ||
745 | static int i2sbus_playback_prepare(struct snd_pcm_substream *substream) | |
746 | { | |
747 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
748 | ||
749 | if (!i2sdev) | |
750 | return -EINVAL; | |
751 | if (i2sdev->out.substream != substream) | |
752 | return -EINVAL; | |
753 | return i2sbus_pcm_prepare(i2sdev, 0); | |
754 | } | |
755 | ||
756 | static int i2sbus_playback_trigger(struct snd_pcm_substream *substream, int cmd) | |
757 | { | |
758 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
759 | ||
760 | if (!i2sdev) | |
761 | return -EINVAL; | |
762 | if (i2sdev->out.substream != substream) | |
763 | return -EINVAL; | |
764 | return i2sbus_pcm_trigger(i2sdev, 0, cmd); | |
765 | } | |
766 | ||
767 | static snd_pcm_uframes_t i2sbus_playback_pointer(struct snd_pcm_substream | |
768 | *substream) | |
769 | { | |
770 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
771 | ||
772 | if (!i2sdev) | |
773 | return -EINVAL; | |
774 | if (i2sdev->out.substream != substream) | |
775 | return 0; | |
776 | return i2sbus_pcm_pointer(i2sdev, 0); | |
777 | } | |
778 | ||
779 | static struct snd_pcm_ops i2sbus_playback_ops = { | |
780 | .open = i2sbus_playback_open, | |
781 | .close = i2sbus_playback_close, | |
782 | .ioctl = snd_pcm_lib_ioctl, | |
783 | .hw_params = i2sbus_hw_params, | |
547ac2ae | 784 | .hw_free = i2sbus_playback_hw_free, |
f3d9478b JB |
785 | .prepare = i2sbus_playback_prepare, |
786 | .trigger = i2sbus_playback_trigger, | |
787 | .pointer = i2sbus_playback_pointer, | |
788 | }; | |
789 | ||
790 | static int i2sbus_record_open(struct snd_pcm_substream *substream) | |
791 | { | |
792 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
793 | ||
794 | if (!i2sdev) | |
795 | return -EINVAL; | |
796 | i2sdev->in.substream = substream; | |
797 | return i2sbus_pcm_open(i2sdev, 1); | |
798 | } | |
799 | ||
800 | static int i2sbus_record_close(struct snd_pcm_substream *substream) | |
801 | { | |
802 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
803 | int err; | |
804 | ||
805 | if (!i2sdev) | |
806 | return -EINVAL; | |
807 | if (i2sdev->in.substream != substream) | |
808 | return -EINVAL; | |
809 | err = i2sbus_pcm_close(i2sdev, 1); | |
810 | if (!err) | |
811 | i2sdev->in.substream = NULL; | |
812 | return err; | |
813 | } | |
814 | ||
815 | static int i2sbus_record_prepare(struct snd_pcm_substream *substream) | |
816 | { | |
817 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
818 | ||
819 | if (!i2sdev) | |
820 | return -EINVAL; | |
821 | if (i2sdev->in.substream != substream) | |
822 | return -EINVAL; | |
823 | return i2sbus_pcm_prepare(i2sdev, 1); | |
824 | } | |
825 | ||
826 | static int i2sbus_record_trigger(struct snd_pcm_substream *substream, int cmd) | |
827 | { | |
828 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
829 | ||
830 | if (!i2sdev) | |
831 | return -EINVAL; | |
832 | if (i2sdev->in.substream != substream) | |
833 | return -EINVAL; | |
834 | return i2sbus_pcm_trigger(i2sdev, 1, cmd); | |
835 | } | |
836 | ||
837 | static snd_pcm_uframes_t i2sbus_record_pointer(struct snd_pcm_substream | |
838 | *substream) | |
839 | { | |
840 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
841 | ||
842 | if (!i2sdev) | |
843 | return -EINVAL; | |
844 | if (i2sdev->in.substream != substream) | |
845 | return 0; | |
846 | return i2sbus_pcm_pointer(i2sdev, 1); | |
847 | } | |
848 | ||
849 | static struct snd_pcm_ops i2sbus_record_ops = { | |
850 | .open = i2sbus_record_open, | |
851 | .close = i2sbus_record_close, | |
852 | .ioctl = snd_pcm_lib_ioctl, | |
853 | .hw_params = i2sbus_hw_params, | |
547ac2ae | 854 | .hw_free = i2sbus_record_hw_free, |
f3d9478b JB |
855 | .prepare = i2sbus_record_prepare, |
856 | .trigger = i2sbus_record_trigger, | |
857 | .pointer = i2sbus_record_pointer, | |
858 | }; | |
859 | ||
860 | static void i2sbus_private_free(struct snd_pcm *pcm) | |
861 | { | |
862 | struct i2sbus_dev *i2sdev = snd_pcm_chip(pcm); | |
863 | struct codec_info_item *p, *tmp; | |
864 | ||
865 | i2sdev->sound.pcm = NULL; | |
866 | i2sdev->out.created = 0; | |
867 | i2sdev->in.created = 0; | |
868 | list_for_each_entry_safe(p, tmp, &i2sdev->sound.codec_list, list) { | |
869 | printk(KERN_ERR "i2sbus: a codec didn't unregister!\n"); | |
870 | list_del(&p->list); | |
871 | module_put(p->codec->owner); | |
872 | kfree(p); | |
873 | } | |
874 | soundbus_dev_put(&i2sdev->sound); | |
875 | module_put(THIS_MODULE); | |
876 | } | |
877 | ||
f3d9478b JB |
878 | int |
879 | i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card, | |
880 | struct codec_info *ci, void *data) | |
881 | { | |
882 | int err, in = 0, out = 0; | |
883 | struct transfer_info *tmp; | |
884 | struct i2sbus_dev *i2sdev = soundbus_dev_to_i2sbus_dev(dev); | |
885 | struct codec_info_item *cii; | |
886 | ||
887 | if (!dev->pcmname || dev->pcmid == -1) { | |
888 | printk(KERN_ERR "i2sbus: pcm name and id must be set!\n"); | |
889 | return -EINVAL; | |
890 | } | |
891 | ||
892 | list_for_each_entry(cii, &dev->codec_list, list) { | |
893 | if (cii->codec_data == data) | |
894 | return -EALREADY; | |
895 | } | |
896 | ||
897 | if (!ci->transfers || !ci->transfers->formats | |
898 | || !ci->transfers->rates || !ci->usable) | |
899 | return -EINVAL; | |
900 | ||
901 | /* we currently code the i2s transfer on the clock, and support only | |
902 | * 32 and 64 */ | |
903 | if (ci->bus_factor != 32 && ci->bus_factor != 64) | |
904 | return -EINVAL; | |
905 | ||
906 | /* If you want to fix this, you need to keep track of what transport infos | |
907 | * are to be used, which codecs they belong to, and then fix all the | |
908 | * sysclock/busclock stuff above to depend on which is usable */ | |
909 | list_for_each_entry(cii, &dev->codec_list, list) { | |
910 | if (cii->codec->sysclock_factor != ci->sysclock_factor) { | |
911 | printk(KERN_DEBUG | |
912 | "cannot yet handle multiple different sysclocks!\n"); | |
913 | return -EINVAL; | |
914 | } | |
915 | if (cii->codec->bus_factor != ci->bus_factor) { | |
916 | printk(KERN_DEBUG | |
917 | "cannot yet handle multiple different bus clocks!\n"); | |
918 | return -EINVAL; | |
919 | } | |
920 | } | |
921 | ||
922 | tmp = ci->transfers; | |
923 | while (tmp->formats && tmp->rates) { | |
924 | if (tmp->transfer_in) | |
925 | in = 1; | |
926 | else | |
927 | out = 1; | |
928 | tmp++; | |
929 | } | |
930 | ||
931 | cii = kzalloc(sizeof(struct codec_info_item), GFP_KERNEL); | |
932 | if (!cii) { | |
933 | printk(KERN_DEBUG "i2sbus: failed to allocate cii\n"); | |
934 | return -ENOMEM; | |
935 | } | |
936 | ||
937 | /* use the private data to point to the codec info */ | |
938 | cii->sdev = soundbus_dev_get(dev); | |
939 | cii->codec = ci; | |
940 | cii->codec_data = data; | |
941 | ||
942 | if (!cii->sdev) { | |
943 | printk(KERN_DEBUG | |
944 | "i2sbus: failed to get soundbus dev reference\n"); | |
d595ee7e JB |
945 | err = -ENODEV; |
946 | goto out_free_cii; | |
f3d9478b JB |
947 | } |
948 | ||
949 | if (!try_module_get(THIS_MODULE)) { | |
950 | printk(KERN_DEBUG "i2sbus: failed to get module reference!\n"); | |
d595ee7e JB |
951 | err = -EBUSY; |
952 | goto out_put_sdev; | |
f3d9478b JB |
953 | } |
954 | ||
955 | if (!try_module_get(ci->owner)) { | |
956 | printk(KERN_DEBUG | |
957 | "i2sbus: failed to get module reference to codec owner!\n"); | |
d595ee7e JB |
958 | err = -EBUSY; |
959 | goto out_put_this_module; | |
f3d9478b JB |
960 | } |
961 | ||
962 | if (!dev->pcm) { | |
73e85fe8 | 963 | err = snd_pcm_new(card, dev->pcmname, dev->pcmid, 0, 0, |
f3d9478b JB |
964 | &dev->pcm); |
965 | if (err) { | |
966 | printk(KERN_DEBUG "i2sbus: failed to create pcm\n"); | |
d595ee7e | 967 | goto out_put_ci_module; |
f3d9478b | 968 | } |
73e85fe8 | 969 | dev->pcm->dev = &dev->ofdev.dev; |
f3d9478b JB |
970 | } |
971 | ||
972 | /* ALSA yet again sucks. | |
973 | * If it is ever fixed, remove this line. See below. */ | |
974 | out = in = 1; | |
975 | ||
976 | if (!i2sdev->out.created && out) { | |
977 | if (dev->pcm->card != card) { | |
978 | /* eh? */ | |
979 | printk(KERN_ERR | |
980 | "Can't attach same bus to different cards!\n"); | |
d595ee7e JB |
981 | err = -EINVAL; |
982 | goto out_put_ci_module; | |
f3d9478b | 983 | } |
d595ee7e JB |
984 | err = snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, 1); |
985 | if (err) | |
986 | goto out_put_ci_module; | |
f3d9478b JB |
987 | snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, |
988 | &i2sbus_playback_ops); | |
989 | i2sdev->out.created = 1; | |
990 | } | |
991 | ||
992 | if (!i2sdev->in.created && in) { | |
993 | if (dev->pcm->card != card) { | |
994 | printk(KERN_ERR | |
995 | "Can't attach same bus to different cards!\n"); | |
3d3909ff | 996 | err = -EINVAL; |
d595ee7e | 997 | goto out_put_ci_module; |
f3d9478b | 998 | } |
d595ee7e JB |
999 | err = snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, 1); |
1000 | if (err) | |
1001 | goto out_put_ci_module; | |
f3d9478b JB |
1002 | snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, |
1003 | &i2sbus_record_ops); | |
1004 | i2sdev->in.created = 1; | |
1005 | } | |
1006 | ||
1007 | /* so we have to register the pcm after adding any substream | |
1008 | * to it because alsa doesn't create the devices for the | |
1009 | * substreams when we add them later. | |
1010 | * Therefore, force in and out on both busses (above) and | |
1011 | * register the pcm now instead of just after creating it. | |
1012 | */ | |
1013 | err = snd_device_register(card, dev->pcm); | |
1014 | if (err) { | |
1015 | printk(KERN_ERR "i2sbus: error registering new pcm\n"); | |
d595ee7e | 1016 | goto out_put_ci_module; |
f3d9478b JB |
1017 | } |
1018 | /* no errors any more, so let's add this to our list */ | |
1019 | list_add(&cii->list, &dev->codec_list); | |
1020 | ||
1021 | dev->pcm->private_data = i2sdev; | |
1022 | dev->pcm->private_free = i2sbus_private_free; | |
1023 | ||
1024 | /* well, we really should support scatter/gather DMA */ | |
1025 | snd_pcm_lib_preallocate_pages_for_all( | |
1026 | dev->pcm, SNDRV_DMA_TYPE_DEV, | |
1027 | snd_dma_pci_data(macio_get_pci_dev(i2sdev->macio)), | |
1028 | 64 * 1024, 64 * 1024); | |
1029 | ||
1030 | return 0; | |
d595ee7e JB |
1031 | out_put_ci_module: |
1032 | module_put(ci->owner); | |
1033 | out_put_this_module: | |
1034 | module_put(THIS_MODULE); | |
1035 | out_put_sdev: | |
1036 | soundbus_dev_put(dev); | |
1037 | out_free_cii: | |
1038 | kfree(cii); | |
1039 | return err; | |
f3d9478b JB |
1040 | } |
1041 | ||
1042 | void i2sbus_detach_codec(struct soundbus_dev *dev, void *data) | |
1043 | { | |
1044 | struct codec_info_item *cii = NULL, *i; | |
1045 | ||
1046 | list_for_each_entry(i, &dev->codec_list, list) { | |
1047 | if (i->codec_data == data) { | |
1048 | cii = i; | |
1049 | break; | |
1050 | } | |
1051 | } | |
1052 | if (cii) { | |
1053 | list_del(&cii->list); | |
1054 | module_put(cii->codec->owner); | |
1055 | kfree(cii); | |
1056 | } | |
1057 | /* no more codecs, but still a pcm? */ | |
1058 | if (list_empty(&dev->codec_list) && dev->pcm) { | |
1059 | /* the actual cleanup is done by the callback above! */ | |
1060 | snd_device_free(dev->pcm->card, dev->pcm); | |
1061 | } | |
1062 | } |