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d6869352 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f3d9478b JB |
2 | /* |
3 | * i2sbus driver -- pcm routines | |
4 | * | |
5 | * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> | |
f3d9478b JB |
6 | */ |
7 | ||
6cbbfe1c | 8 | #include <linux/io.h> |
f3d9478b | 9 | #include <linux/delay.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
f3d9478b JB |
11 | #include <sound/core.h> |
12 | #include <asm/macio.h> | |
13 | #include <linux/pci.h> | |
da155d5b | 14 | #include <linux/module.h> |
f3d9478b JB |
15 | #include "../soundbus.h" |
16 | #include "i2sbus.h" | |
17 | ||
18 | static inline void get_pcm_info(struct i2sbus_dev *i2sdev, int in, | |
19 | struct pcm_info **pi, struct pcm_info **other) | |
20 | { | |
21 | if (in) { | |
22 | if (pi) | |
23 | *pi = &i2sdev->in; | |
24 | if (other) | |
25 | *other = &i2sdev->out; | |
26 | } else { | |
27 | if (pi) | |
28 | *pi = &i2sdev->out; | |
29 | if (other) | |
30 | *other = &i2sdev->in; | |
31 | } | |
32 | } | |
33 | ||
34 | static int clock_and_divisors(int mclk, int sclk, int rate, int *out) | |
35 | { | |
36 | /* sclk must be derived from mclk! */ | |
37 | if (mclk % sclk) | |
38 | return -1; | |
39 | /* derive sclk register value */ | |
40 | if (i2s_sf_sclkdiv(mclk / sclk, out)) | |
41 | return -1; | |
42 | ||
43 | if (I2S_CLOCK_SPEED_18MHz % (rate * mclk) == 0) { | |
44 | if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_18MHz / (rate * mclk), out)) { | |
45 | *out |= I2S_SF_CLOCK_SOURCE_18MHz; | |
46 | return 0; | |
47 | } | |
48 | } | |
49 | if (I2S_CLOCK_SPEED_45MHz % (rate * mclk) == 0) { | |
50 | if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_45MHz / (rate * mclk), out)) { | |
51 | *out |= I2S_SF_CLOCK_SOURCE_45MHz; | |
52 | return 0; | |
53 | } | |
54 | } | |
55 | if (I2S_CLOCK_SPEED_49MHz % (rate * mclk) == 0) { | |
56 | if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_49MHz / (rate * mclk), out)) { | |
57 | *out |= I2S_SF_CLOCK_SOURCE_49MHz; | |
58 | return 0; | |
59 | } | |
60 | } | |
61 | return -1; | |
62 | } | |
63 | ||
64 | #define CHECK_RATE(rate) \ | |
65 | do { if (rates & SNDRV_PCM_RATE_ ##rate) { \ | |
66 | int dummy; \ | |
67 | if (clock_and_divisors(sysclock_factor, \ | |
68 | bus_factor, rate, &dummy)) \ | |
69 | rates &= ~SNDRV_PCM_RATE_ ##rate; \ | |
70 | } } while (0) | |
71 | ||
72 | static int i2sbus_pcm_open(struct i2sbus_dev *i2sdev, int in) | |
73 | { | |
74 | struct pcm_info *pi, *other; | |
75 | struct soundbus_dev *sdev; | |
76 | int masks_inited = 0, err; | |
77 | struct codec_info_item *cii, *rev; | |
78 | struct snd_pcm_hardware *hw; | |
79 | u64 formats = 0; | |
80 | unsigned int rates = 0; | |
81 | struct transfer_info v; | |
82 | int result = 0; | |
83 | int bus_factor = 0, sysclock_factor = 0; | |
84 | int found_this; | |
85 | ||
86 | mutex_lock(&i2sdev->lock); | |
87 | ||
88 | get_pcm_info(i2sdev, in, &pi, &other); | |
89 | ||
90 | hw = &pi->substream->runtime->hw; | |
91 | sdev = &i2sdev->sound; | |
92 | ||
93 | if (pi->active) { | |
94 | /* alsa messed up */ | |
95 | result = -EBUSY; | |
96 | goto out_unlock; | |
97 | } | |
98 | ||
99 | /* we now need to assign the hw */ | |
100 | list_for_each_entry(cii, &sdev->codec_list, list) { | |
101 | struct transfer_info *ti = cii->codec->transfers; | |
102 | bus_factor = cii->codec->bus_factor; | |
103 | sysclock_factor = cii->codec->sysclock_factor; | |
104 | while (ti->formats && ti->rates) { | |
105 | v = *ti; | |
106 | if (ti->transfer_in == in | |
107 | && cii->codec->usable(cii, ti, &v)) { | |
108 | if (masks_inited) { | |
109 | formats &= v.formats; | |
110 | rates &= v.rates; | |
111 | } else { | |
112 | formats = v.formats; | |
113 | rates = v.rates; | |
114 | masks_inited = 1; | |
115 | } | |
116 | } | |
117 | ti++; | |
118 | } | |
119 | } | |
120 | if (!masks_inited || !bus_factor || !sysclock_factor) { | |
121 | result = -ENODEV; | |
122 | goto out_unlock; | |
123 | } | |
124 | /* bus dependent stuff */ | |
125 | hw->info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | | |
547ac2ae PM |
126 | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_RESUME | |
127 | SNDRV_PCM_INFO_JOINT_DUPLEX; | |
f3d9478b JB |
128 | |
129 | CHECK_RATE(5512); | |
130 | CHECK_RATE(8000); | |
131 | CHECK_RATE(11025); | |
132 | CHECK_RATE(16000); | |
133 | CHECK_RATE(22050); | |
134 | CHECK_RATE(32000); | |
135 | CHECK_RATE(44100); | |
136 | CHECK_RATE(48000); | |
137 | CHECK_RATE(64000); | |
138 | CHECK_RATE(88200); | |
139 | CHECK_RATE(96000); | |
140 | CHECK_RATE(176400); | |
141 | CHECK_RATE(192000); | |
142 | hw->rates = rates; | |
143 | ||
144 | /* well. the codec might want 24 bits only, and we'll | |
145 | * ever only transfer 24 bits, but they are top-aligned! | |
146 | * So for alsa, we claim that we're doing full 32 bit | |
147 | * while in reality we'll ignore the lower 8 bits of | |
148 | * that when doing playback (they're transferred as 0 | |
149 | * as far as I know, no codecs we have are 32-bit capable | |
150 | * so I can't really test) and when doing recording we'll | |
151 | * always have those lower 8 bits recorded as 0 */ | |
152 | if (formats & SNDRV_PCM_FMTBIT_S24_BE) | |
153 | formats |= SNDRV_PCM_FMTBIT_S32_BE; | |
154 | if (formats & SNDRV_PCM_FMTBIT_U24_BE) | |
155 | formats |= SNDRV_PCM_FMTBIT_U32_BE; | |
156 | /* now mask off what we can support. I suppose we could | |
157 | * also support S24_3LE and some similar formats, but I | |
158 | * doubt there's a codec that would be able to use that, | |
159 | * so we don't support it here. */ | |
160 | hw->formats = formats & (SNDRV_PCM_FMTBIT_S16_BE | | |
161 | SNDRV_PCM_FMTBIT_U16_BE | | |
162 | SNDRV_PCM_FMTBIT_S32_BE | | |
163 | SNDRV_PCM_FMTBIT_U32_BE); | |
164 | ||
165 | /* we need to set the highest and lowest rate possible. | |
166 | * These are the highest and lowest rates alsa can | |
167 | * support properly in its bitfield. | |
168 | * Below, we'll use that to restrict to the rate | |
169 | * currently in use (if any). */ | |
170 | hw->rate_min = 5512; | |
171 | hw->rate_max = 192000; | |
172 | /* if the other stream is active, then we can only | |
173 | * support what it is currently using. | |
174 | * FIXME: I lied. This comment is wrong. We can support | |
175 | * anything that works with the same serial format, ie. | |
176 | * when recording 24 bit sound we can well play 16 bit | |
177 | * sound at the same time iff using the same transfer mode. | |
178 | */ | |
179 | if (other->active) { | |
180 | /* FIXME: is this guaranteed by the alsa api? */ | |
74c34ca1 | 181 | hw->formats &= pcm_format_to_bits(i2sdev->format); |
f3d9478b JB |
182 | /* see above, restrict rates to the one we already have */ |
183 | hw->rate_min = i2sdev->rate; | |
184 | hw->rate_max = i2sdev->rate; | |
185 | } | |
186 | ||
187 | hw->channels_min = 2; | |
188 | hw->channels_max = 2; | |
189 | /* these are somewhat arbitrary */ | |
190 | hw->buffer_bytes_max = 131072; | |
191 | hw->period_bytes_min = 256; | |
192 | hw->period_bytes_max = 16384; | |
193 | hw->periods_min = 3; | |
194 | hw->periods_max = MAX_DBDMA_COMMANDS; | |
df86d114 HL |
195 | err = snd_pcm_hw_constraint_integer(pi->substream->runtime, |
196 | SNDRV_PCM_HW_PARAM_PERIODS); | |
197 | if (err < 0) { | |
198 | result = err; | |
199 | goto out_unlock; | |
200 | } | |
f3d9478b JB |
201 | list_for_each_entry(cii, &sdev->codec_list, list) { |
202 | if (cii->codec->open) { | |
203 | err = cii->codec->open(cii, pi->substream); | |
204 | if (err) { | |
205 | result = err; | |
206 | /* unwind */ | |
207 | found_this = 0; | |
208 | list_for_each_entry_reverse(rev, | |
209 | &sdev->codec_list, list) { | |
210 | if (found_this && rev->codec->close) { | |
211 | rev->codec->close(rev, | |
212 | pi->substream); | |
213 | } | |
214 | if (rev == cii) | |
215 | found_this = 1; | |
216 | } | |
217 | goto out_unlock; | |
218 | } | |
219 | } | |
220 | } | |
221 | ||
222 | out_unlock: | |
223 | mutex_unlock(&i2sdev->lock); | |
224 | return result; | |
225 | } | |
226 | ||
227 | #undef CHECK_RATE | |
228 | ||
229 | static int i2sbus_pcm_close(struct i2sbus_dev *i2sdev, int in) | |
230 | { | |
231 | struct codec_info_item *cii; | |
232 | struct pcm_info *pi; | |
233 | int err = 0, tmp; | |
234 | ||
235 | mutex_lock(&i2sdev->lock); | |
236 | ||
237 | get_pcm_info(i2sdev, in, &pi, NULL); | |
238 | ||
239 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { | |
240 | if (cii->codec->close) { | |
241 | tmp = cii->codec->close(cii, pi->substream); | |
242 | if (tmp) | |
243 | err = tmp; | |
244 | } | |
245 | } | |
246 | ||
247 | pi->substream = NULL; | |
248 | pi->active = 0; | |
249 | mutex_unlock(&i2sdev->lock); | |
250 | return err; | |
251 | } | |
252 | ||
547ac2ae PM |
253 | static void i2sbus_wait_for_stop(struct i2sbus_dev *i2sdev, |
254 | struct pcm_info *pi) | |
255 | { | |
256 | unsigned long flags; | |
5656a7a0 | 257 | DECLARE_COMPLETION_ONSTACK(done); |
547ac2ae PM |
258 | long timeout; |
259 | ||
260 | spin_lock_irqsave(&i2sdev->low_lock, flags); | |
261 | if (pi->dbdma_ring.stopping) { | |
547ac2ae PM |
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 | ||
547ac2ae | 296 | static inline int i2sbus_hw_free(struct snd_pcm_substream *substream, int in) |
f3d9478b | 297 | { |
547ac2ae PM |
298 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); |
299 | struct pcm_info *pi; | |
300 | ||
301 | get_pcm_info(i2sdev, in, &pi, NULL); | |
302 | if (pi->dbdma_ring.stopping) | |
303 | i2sbus_wait_for_stop(i2sdev, pi); | |
f3d9478b JB |
304 | return 0; |
305 | } | |
306 | ||
547ac2ae PM |
307 | static int i2sbus_playback_hw_free(struct snd_pcm_substream *substream) |
308 | { | |
309 | return i2sbus_hw_free(substream, 0); | |
310 | } | |
311 | ||
312 | static int i2sbus_record_hw_free(struct snd_pcm_substream *substream) | |
313 | { | |
314 | return i2sbus_hw_free(substream, 1); | |
315 | } | |
316 | ||
f3d9478b JB |
317 | static int i2sbus_pcm_prepare(struct i2sbus_dev *i2sdev, int in) |
318 | { | |
319 | /* whee. Hard work now. The user has selected a bitrate | |
320 | * and bit format, so now we have to program our | |
321 | * I2S controller appropriately. */ | |
322 | struct snd_pcm_runtime *runtime; | |
323 | struct dbdma_cmd *command; | |
547ac2ae | 324 | int i, periodsize, nperiods; |
f3d9478b JB |
325 | dma_addr_t offset; |
326 | struct bus_info bi; | |
327 | struct codec_info_item *cii; | |
328 | int sfr = 0; /* serial format register */ | |
329 | int dws = 0; /* data word sizes reg */ | |
330 | int input_16bit; | |
331 | struct pcm_info *pi, *other; | |
332 | int cnt; | |
333 | int result = 0; | |
547ac2ae | 334 | unsigned int cmd, stopaddr; |
f3d9478b JB |
335 | |
336 | mutex_lock(&i2sdev->lock); | |
337 | ||
338 | get_pcm_info(i2sdev, in, &pi, &other); | |
339 | ||
340 | if (pi->dbdma_ring.running) { | |
341 | result = -EBUSY; | |
342 | goto out_unlock; | |
343 | } | |
547ac2ae PM |
344 | if (pi->dbdma_ring.stopping) |
345 | i2sbus_wait_for_stop(i2sdev, pi); | |
346 | ||
347 | if (!pi->substream || !pi->substream->runtime) { | |
348 | result = -EINVAL; | |
349 | goto out_unlock; | |
350 | } | |
f3d9478b JB |
351 | |
352 | runtime = pi->substream->runtime; | |
353 | pi->active = 1; | |
354 | if (other->active && | |
355 | ((i2sdev->format != runtime->format) | |
356 | || (i2sdev->rate != runtime->rate))) { | |
357 | result = -EINVAL; | |
358 | goto out_unlock; | |
359 | } | |
360 | ||
361 | i2sdev->format = runtime->format; | |
362 | i2sdev->rate = runtime->rate; | |
363 | ||
364 | periodsize = snd_pcm_lib_period_bytes(pi->substream); | |
547ac2ae | 365 | nperiods = pi->substream->runtime->periods; |
f3d9478b JB |
366 | pi->current_period = 0; |
367 | ||
368 | /* generate dbdma command ring first */ | |
369 | command = pi->dbdma_ring.cmds; | |
547ac2ae PM |
370 | memset(command, 0, (nperiods + 2) * sizeof(struct dbdma_cmd)); |
371 | ||
372 | /* commands to DMA to/from the ring */ | |
373 | /* | |
374 | * For input, we need to do a graceful stop; if we abort | |
375 | * the DMA, we end up with leftover bytes that corrupt | |
376 | * the next recording. To do this we set the S0 status | |
377 | * bit and wait for the DMA controller to stop. Each | |
378 | * command has a branch condition to | |
379 | * make it branch to a stop command if S0 is set. | |
380 | * On input we also need to wait for the S7 bit to be | |
381 | * set before turning off the DMA controller. | |
382 | * In fact we do the graceful stop for output as well. | |
383 | */ | |
f3d9478b | 384 | offset = runtime->dma_addr; |
547ac2ae PM |
385 | cmd = (in? INPUT_MORE: OUTPUT_MORE) | BR_IFSET | INTR_ALWAYS; |
386 | stopaddr = pi->dbdma_ring.bus_cmd_start + | |
387 | (nperiods + 1) * sizeof(struct dbdma_cmd); | |
388 | for (i = 0; i < nperiods; i++, command++, offset += periodsize) { | |
389 | command->command = cpu_to_le16(cmd); | |
390 | command->cmd_dep = cpu_to_le32(stopaddr); | |
f3d9478b JB |
391 | command->phy_addr = cpu_to_le32(offset); |
392 | command->req_count = cpu_to_le16(periodsize); | |
f3d9478b | 393 | } |
547ac2ae PM |
394 | |
395 | /* branch back to beginning of ring */ | |
396 | command->command = cpu_to_le16(DBDMA_NOP | BR_ALWAYS); | |
f3d9478b | 397 | command->cmd_dep = cpu_to_le32(pi->dbdma_ring.bus_cmd_start); |
547ac2ae PM |
398 | command++; |
399 | ||
400 | /* set stop command */ | |
401 | command->command = cpu_to_le16(DBDMA_STOP); | |
f3d9478b JB |
402 | |
403 | /* ok, let's set the serial format and stuff */ | |
404 | switch (runtime->format) { | |
405 | /* 16 bit formats */ | |
406 | case SNDRV_PCM_FORMAT_S16_BE: | |
407 | case SNDRV_PCM_FORMAT_U16_BE: | |
408 | /* FIXME: if we add different bus factors we need to | |
409 | * do more here!! */ | |
410 | bi.bus_factor = 0; | |
411 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { | |
412 | bi.bus_factor = cii->codec->bus_factor; | |
413 | break; | |
414 | } | |
415 | if (!bi.bus_factor) { | |
416 | result = -ENODEV; | |
417 | goto out_unlock; | |
418 | } | |
419 | input_16bit = 1; | |
420 | break; | |
421 | case SNDRV_PCM_FORMAT_S32_BE: | |
422 | case SNDRV_PCM_FORMAT_U32_BE: | |
423 | /* force 64x bus speed, otherwise the data cannot be | |
424 | * transferred quickly enough! */ | |
425 | bi.bus_factor = 64; | |
426 | input_16bit = 0; | |
427 | break; | |
428 | default: | |
429 | result = -EINVAL; | |
430 | goto out_unlock; | |
431 | } | |
432 | /* we assume all sysclocks are the same! */ | |
433 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { | |
434 | bi.sysclock_factor = cii->codec->sysclock_factor; | |
435 | break; | |
436 | } | |
437 | ||
438 | if (clock_and_divisors(bi.sysclock_factor, | |
439 | bi.bus_factor, | |
440 | runtime->rate, | |
441 | &sfr) < 0) { | |
442 | result = -EINVAL; | |
443 | goto out_unlock; | |
444 | } | |
445 | switch (bi.bus_factor) { | |
446 | case 32: | |
447 | sfr |= I2S_SF_SERIAL_FORMAT_I2S_32X; | |
448 | break; | |
449 | case 64: | |
450 | sfr |= I2S_SF_SERIAL_FORMAT_I2S_64X; | |
451 | break; | |
452 | } | |
453 | /* FIXME: THIS ASSUMES MASTER ALL THE TIME */ | |
454 | sfr |= I2S_SF_SCLK_MASTER; | |
455 | ||
456 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { | |
457 | int err = 0; | |
458 | if (cii->codec->prepare) | |
459 | err = cii->codec->prepare(cii, &bi, pi->substream); | |
460 | if (err) { | |
461 | result = err; | |
462 | goto out_unlock; | |
463 | } | |
464 | } | |
465 | /* codecs are fine with it, so set our clocks */ | |
466 | if (input_16bit) | |
467 | dws = (2 << I2S_DWS_NUM_CHANNELS_IN_SHIFT) | | |
468 | (2 << I2S_DWS_NUM_CHANNELS_OUT_SHIFT) | | |
469 | I2S_DWS_DATA_IN_16BIT | I2S_DWS_DATA_OUT_16BIT; | |
470 | else | |
471 | dws = (2 << I2S_DWS_NUM_CHANNELS_IN_SHIFT) | | |
472 | (2 << I2S_DWS_NUM_CHANNELS_OUT_SHIFT) | | |
473 | I2S_DWS_DATA_IN_24BIT | I2S_DWS_DATA_OUT_24BIT; | |
474 | ||
475 | /* early exit if already programmed correctly */ | |
476 | /* not locking these is fine since we touch them only in this function */ | |
477 | if (in_le32(&i2sdev->intfregs->serial_format) == sfr | |
478 | && in_le32(&i2sdev->intfregs->data_word_sizes) == dws) | |
479 | goto out_unlock; | |
480 | ||
481 | /* let's notify the codecs about clocks going away. | |
482 | * For now we only do mastering on the i2s cell... */ | |
483 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) | |
484 | if (cii->codec->switch_clock) | |
485 | cii->codec->switch_clock(cii, CLOCK_SWITCH_PREPARE_SLAVE); | |
486 | ||
487 | i2sbus_control_enable(i2sdev->control, i2sdev); | |
488 | i2sbus_control_cell(i2sdev->control, i2sdev, 1); | |
489 | ||
490 | out_le32(&i2sdev->intfregs->intr_ctl, I2S_PENDING_CLOCKS_STOPPED); | |
491 | ||
492 | i2sbus_control_clock(i2sdev->control, i2sdev, 0); | |
493 | ||
494 | msleep(1); | |
495 | ||
496 | /* wait for clock stopped. This can apparently take a while... */ | |
497 | cnt = 100; | |
498 | while (cnt-- && | |
499 | !(in_le32(&i2sdev->intfregs->intr_ctl) & I2S_PENDING_CLOCKS_STOPPED)) { | |
500 | msleep(5); | |
501 | } | |
502 | out_le32(&i2sdev->intfregs->intr_ctl, I2S_PENDING_CLOCKS_STOPPED); | |
503 | ||
504 | /* not locking these is fine since we touch them only in this function */ | |
505 | out_le32(&i2sdev->intfregs->serial_format, sfr); | |
506 | out_le32(&i2sdev->intfregs->data_word_sizes, dws); | |
507 | ||
508 | i2sbus_control_enable(i2sdev->control, i2sdev); | |
509 | i2sbus_control_cell(i2sdev->control, i2sdev, 1); | |
510 | i2sbus_control_clock(i2sdev->control, i2sdev, 1); | |
511 | msleep(1); | |
512 | ||
513 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) | |
514 | if (cii->codec->switch_clock) | |
515 | cii->codec->switch_clock(cii, CLOCK_SWITCH_SLAVE); | |
516 | ||
517 | out_unlock: | |
518 | mutex_unlock(&i2sdev->lock); | |
519 | return result; | |
520 | } | |
521 | ||
547ac2ae PM |
522 | #ifdef CONFIG_PM |
523 | void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev) | |
524 | { | |
525 | i2sbus_pcm_prepare(i2sdev, 0); | |
526 | i2sbus_pcm_prepare(i2sdev, 1); | |
527 | } | |
528 | #endif | |
f3d9478b JB |
529 | |
530 | static int i2sbus_pcm_trigger(struct i2sbus_dev *i2sdev, int in, int cmd) | |
531 | { | |
532 | struct codec_info_item *cii; | |
533 | struct pcm_info *pi; | |
f3d9478b JB |
534 | int result = 0; |
535 | unsigned long flags; | |
536 | ||
537 | spin_lock_irqsave(&i2sdev->low_lock, flags); | |
538 | ||
539 | get_pcm_info(i2sdev, in, &pi, NULL); | |
540 | ||
541 | switch (cmd) { | |
542 | case SNDRV_PCM_TRIGGER_START: | |
543 | case SNDRV_PCM_TRIGGER_RESUME: | |
544 | if (pi->dbdma_ring.running) { | |
545 | result = -EALREADY; | |
546 | goto out_unlock; | |
547 | } | |
548 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) | |
549 | if (cii->codec->start) | |
550 | cii->codec->start(cii, pi->substream); | |
551 | pi->dbdma_ring.running = 1; | |
552 | ||
547ac2ae PM |
553 | if (pi->dbdma_ring.stopping) { |
554 | /* Clear the S0 bit, then see if we stopped yet */ | |
555 | out_le32(&pi->dbdma->control, 1 << 16); | |
556 | if (in_le32(&pi->dbdma->status) & ACTIVE) { | |
557 | /* possible race here? */ | |
558 | udelay(10); | |
559 | if (in_le32(&pi->dbdma->status) & ACTIVE) { | |
560 | pi->dbdma_ring.stopping = 0; | |
561 | goto out_unlock; /* keep running */ | |
562 | } | |
563 | } | |
f3d9478b JB |
564 | } |
565 | ||
547ac2ae PM |
566 | /* make sure RUN, PAUSE and S0 bits are cleared */ |
567 | out_le32(&pi->dbdma->control, (RUN | PAUSE | 1) << 16); | |
568 | ||
569 | /* set branch condition select register */ | |
570 | out_le32(&pi->dbdma->br_sel, (1 << 16) | 1); | |
571 | ||
f3d9478b JB |
572 | /* write dma command buffer address to the dbdma chip */ |
573 | out_le32(&pi->dbdma->cmdptr, pi->dbdma_ring.bus_cmd_start); | |
f3d9478b | 574 | |
547ac2ae PM |
575 | /* initialize the frame count and current period */ |
576 | pi->current_period = 0; | |
f3d9478b JB |
577 | pi->frame_count = in_le32(&i2sdev->intfregs->frame_count); |
578 | ||
547ac2ae PM |
579 | /* set the DMA controller running */ |
580 | out_le32(&pi->dbdma->control, (RUN << 16) | RUN); | |
581 | ||
f3d9478b JB |
582 | /* off you go! */ |
583 | break; | |
547ac2ae | 584 | |
f3d9478b JB |
585 | case SNDRV_PCM_TRIGGER_STOP: |
586 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
587 | if (!pi->dbdma_ring.running) { | |
588 | result = -EALREADY; | |
589 | goto out_unlock; | |
590 | } | |
547ac2ae | 591 | pi->dbdma_ring.running = 0; |
f3d9478b | 592 | |
547ac2ae PM |
593 | /* Set the S0 bit to make the DMA branch to the stop cmd */ |
594 | out_le32(&pi->dbdma->control, (1 << 16) | 1); | |
595 | pi->dbdma_ring.stopping = 1; | |
f3d9478b | 596 | |
f3d9478b JB |
597 | list_for_each_entry(cii, &i2sdev->sound.codec_list, list) |
598 | if (cii->codec->stop) | |
599 | cii->codec->stop(cii, pi->substream); | |
600 | break; | |
601 | default: | |
602 | result = -EINVAL; | |
603 | goto out_unlock; | |
604 | } | |
605 | ||
606 | out_unlock: | |
607 | spin_unlock_irqrestore(&i2sdev->low_lock, flags); | |
608 | return result; | |
609 | } | |
610 | ||
611 | static snd_pcm_uframes_t i2sbus_pcm_pointer(struct i2sbus_dev *i2sdev, int in) | |
612 | { | |
613 | struct pcm_info *pi; | |
614 | u32 fc; | |
615 | ||
616 | get_pcm_info(i2sdev, in, &pi, NULL); | |
617 | ||
618 | fc = in_le32(&i2sdev->intfregs->frame_count); | |
619 | fc = fc - pi->frame_count; | |
620 | ||
547ac2ae PM |
621 | if (fc >= pi->substream->runtime->buffer_size) |
622 | fc %= pi->substream->runtime->buffer_size; | |
623 | return fc; | |
f3d9478b JB |
624 | } |
625 | ||
626 | static inline void handle_interrupt(struct i2sbus_dev *i2sdev, int in) | |
627 | { | |
628 | struct pcm_info *pi; | |
547ac2ae PM |
629 | u32 fc, nframes; |
630 | u32 status; | |
631 | int timeout, i; | |
632 | int dma_stopped = 0; | |
633 | struct snd_pcm_runtime *runtime; | |
f3d9478b JB |
634 | |
635 | spin_lock(&i2sdev->low_lock); | |
636 | get_pcm_info(i2sdev, in, &pi, NULL); | |
547ac2ae | 637 | if (!pi->dbdma_ring.running && !pi->dbdma_ring.stopping) |
f3d9478b | 638 | goto out_unlock; |
f3d9478b | 639 | |
547ac2ae PM |
640 | i = pi->current_period; |
641 | runtime = pi->substream->runtime; | |
642 | while (pi->dbdma_ring.cmds[i].xfer_status) { | |
643 | if (le16_to_cpu(pi->dbdma_ring.cmds[i].xfer_status) & BT) | |
644 | /* | |
645 | * BT is the branch taken bit. If it took a branch | |
646 | * it is because we set the S0 bit to make it | |
647 | * branch to the stop command. | |
648 | */ | |
649 | dma_stopped = 1; | |
650 | pi->dbdma_ring.cmds[i].xfer_status = 0; | |
651 | ||
652 | if (++i >= runtime->periods) { | |
653 | i = 0; | |
654 | pi->frame_count += runtime->buffer_size; | |
655 | } | |
656 | pi->current_period = i; | |
657 | ||
658 | /* | |
659 | * Check the frame count. The DMA tends to get a bit | |
660 | * ahead of the frame counter, which confuses the core. | |
661 | */ | |
662 | fc = in_le32(&i2sdev->intfregs->frame_count); | |
663 | nframes = i * runtime->period_size; | |
664 | if (fc < pi->frame_count + nframes) | |
665 | pi->frame_count = fc - nframes; | |
f3d9478b JB |
666 | } |
667 | ||
547ac2ae PM |
668 | if (dma_stopped) { |
669 | timeout = 1000; | |
670 | for (;;) { | |
671 | status = in_le32(&pi->dbdma->status); | |
672 | if (!(status & ACTIVE) && (!in || (status & 0x80))) | |
673 | break; | |
674 | if (--timeout <= 0) { | |
675 | printk(KERN_ERR "i2sbus: timed out " | |
676 | "waiting for DMA to stop!\n"); | |
677 | break; | |
678 | } | |
679 | udelay(1); | |
f3d9478b | 680 | } |
f3d9478b | 681 | |
547ac2ae PM |
682 | /* Turn off DMA controller, clear S0 bit */ |
683 | out_le32(&pi->dbdma->control, (RUN | PAUSE | 1) << 16); | |
f3d9478b | 684 | |
547ac2ae PM |
685 | pi->dbdma_ring.stopping = 0; |
686 | if (pi->stop_completion) | |
687 | complete(pi->stop_completion); | |
688 | } | |
689 | ||
690 | if (!pi->dbdma_ring.running) | |
691 | goto out_unlock; | |
f3d9478b JB |
692 | spin_unlock(&i2sdev->low_lock); |
693 | /* may call _trigger again, hence needs to be unlocked */ | |
694 | snd_pcm_period_elapsed(pi->substream); | |
695 | return; | |
547ac2ae | 696 | |
f3d9478b JB |
697 | out_unlock: |
698 | spin_unlock(&i2sdev->low_lock); | |
699 | } | |
700 | ||
7d12e780 | 701 | irqreturn_t i2sbus_tx_intr(int irq, void *devid) |
f3d9478b JB |
702 | { |
703 | handle_interrupt((struct i2sbus_dev *)devid, 0); | |
704 | return IRQ_HANDLED; | |
705 | } | |
706 | ||
7d12e780 | 707 | irqreturn_t i2sbus_rx_intr(int irq, void *devid) |
f3d9478b JB |
708 | { |
709 | handle_interrupt((struct i2sbus_dev *)devid, 1); | |
710 | return IRQ_HANDLED; | |
711 | } | |
712 | ||
713 | static int i2sbus_playback_open(struct snd_pcm_substream *substream) | |
714 | { | |
715 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
716 | ||
717 | if (!i2sdev) | |
718 | return -EINVAL; | |
719 | i2sdev->out.substream = substream; | |
720 | return i2sbus_pcm_open(i2sdev, 0); | |
721 | } | |
722 | ||
723 | static int i2sbus_playback_close(struct snd_pcm_substream *substream) | |
724 | { | |
725 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
726 | int err; | |
727 | ||
728 | if (!i2sdev) | |
729 | return -EINVAL; | |
730 | if (i2sdev->out.substream != substream) | |
731 | return -EINVAL; | |
732 | err = i2sbus_pcm_close(i2sdev, 0); | |
733 | if (!err) | |
734 | i2sdev->out.substream = NULL; | |
735 | return err; | |
736 | } | |
737 | ||
738 | static int i2sbus_playback_prepare(struct snd_pcm_substream *substream) | |
739 | { | |
740 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
741 | ||
742 | if (!i2sdev) | |
743 | return -EINVAL; | |
744 | if (i2sdev->out.substream != substream) | |
745 | return -EINVAL; | |
746 | return i2sbus_pcm_prepare(i2sdev, 0); | |
747 | } | |
748 | ||
749 | static int i2sbus_playback_trigger(struct snd_pcm_substream *substream, int cmd) | |
750 | { | |
751 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
752 | ||
753 | if (!i2sdev) | |
754 | return -EINVAL; | |
755 | if (i2sdev->out.substream != substream) | |
756 | return -EINVAL; | |
757 | return i2sbus_pcm_trigger(i2sdev, 0, cmd); | |
758 | } | |
759 | ||
760 | static snd_pcm_uframes_t i2sbus_playback_pointer(struct snd_pcm_substream | |
761 | *substream) | |
762 | { | |
763 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
764 | ||
765 | if (!i2sdev) | |
766 | return -EINVAL; | |
767 | if (i2sdev->out.substream != substream) | |
768 | return 0; | |
769 | return i2sbus_pcm_pointer(i2sdev, 0); | |
770 | } | |
771 | ||
18f6dda9 | 772 | static const struct snd_pcm_ops i2sbus_playback_ops = { |
f3d9478b JB |
773 | .open = i2sbus_playback_open, |
774 | .close = i2sbus_playback_close, | |
547ac2ae | 775 | .hw_free = i2sbus_playback_hw_free, |
f3d9478b JB |
776 | .prepare = i2sbus_playback_prepare, |
777 | .trigger = i2sbus_playback_trigger, | |
778 | .pointer = i2sbus_playback_pointer, | |
779 | }; | |
780 | ||
781 | static int i2sbus_record_open(struct snd_pcm_substream *substream) | |
782 | { | |
783 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
784 | ||
785 | if (!i2sdev) | |
786 | return -EINVAL; | |
787 | i2sdev->in.substream = substream; | |
788 | return i2sbus_pcm_open(i2sdev, 1); | |
789 | } | |
790 | ||
791 | static int i2sbus_record_close(struct snd_pcm_substream *substream) | |
792 | { | |
793 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
794 | int err; | |
795 | ||
796 | if (!i2sdev) | |
797 | return -EINVAL; | |
798 | if (i2sdev->in.substream != substream) | |
799 | return -EINVAL; | |
800 | err = i2sbus_pcm_close(i2sdev, 1); | |
801 | if (!err) | |
802 | i2sdev->in.substream = NULL; | |
803 | return err; | |
804 | } | |
805 | ||
806 | static int i2sbus_record_prepare(struct snd_pcm_substream *substream) | |
807 | { | |
808 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
809 | ||
810 | if (!i2sdev) | |
811 | return -EINVAL; | |
812 | if (i2sdev->in.substream != substream) | |
813 | return -EINVAL; | |
814 | return i2sbus_pcm_prepare(i2sdev, 1); | |
815 | } | |
816 | ||
817 | static int i2sbus_record_trigger(struct snd_pcm_substream *substream, int cmd) | |
818 | { | |
819 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
820 | ||
821 | if (!i2sdev) | |
822 | return -EINVAL; | |
823 | if (i2sdev->in.substream != substream) | |
824 | return -EINVAL; | |
825 | return i2sbus_pcm_trigger(i2sdev, 1, cmd); | |
826 | } | |
827 | ||
828 | static snd_pcm_uframes_t i2sbus_record_pointer(struct snd_pcm_substream | |
829 | *substream) | |
830 | { | |
831 | struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); | |
832 | ||
833 | if (!i2sdev) | |
834 | return -EINVAL; | |
835 | if (i2sdev->in.substream != substream) | |
836 | return 0; | |
837 | return i2sbus_pcm_pointer(i2sdev, 1); | |
838 | } | |
839 | ||
18f6dda9 | 840 | static const struct snd_pcm_ops i2sbus_record_ops = { |
f3d9478b JB |
841 | .open = i2sbus_record_open, |
842 | .close = i2sbus_record_close, | |
547ac2ae | 843 | .hw_free = i2sbus_record_hw_free, |
f3d9478b JB |
844 | .prepare = i2sbus_record_prepare, |
845 | .trigger = i2sbus_record_trigger, | |
846 | .pointer = i2sbus_record_pointer, | |
847 | }; | |
848 | ||
849 | static void i2sbus_private_free(struct snd_pcm *pcm) | |
850 | { | |
851 | struct i2sbus_dev *i2sdev = snd_pcm_chip(pcm); | |
852 | struct codec_info_item *p, *tmp; | |
853 | ||
854 | i2sdev->sound.pcm = NULL; | |
855 | i2sdev->out.created = 0; | |
856 | i2sdev->in.created = 0; | |
857 | list_for_each_entry_safe(p, tmp, &i2sdev->sound.codec_list, list) { | |
858 | printk(KERN_ERR "i2sbus: a codec didn't unregister!\n"); | |
859 | list_del(&p->list); | |
860 | module_put(p->codec->owner); | |
861 | kfree(p); | |
862 | } | |
863 | soundbus_dev_put(&i2sdev->sound); | |
864 | module_put(THIS_MODULE); | |
865 | } | |
866 | ||
f3d9478b JB |
867 | int |
868 | i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card, | |
869 | struct codec_info *ci, void *data) | |
870 | { | |
871 | int err, in = 0, out = 0; | |
872 | struct transfer_info *tmp; | |
873 | struct i2sbus_dev *i2sdev = soundbus_dev_to_i2sbus_dev(dev); | |
874 | struct codec_info_item *cii; | |
875 | ||
876 | if (!dev->pcmname || dev->pcmid == -1) { | |
877 | printk(KERN_ERR "i2sbus: pcm name and id must be set!\n"); | |
878 | return -EINVAL; | |
879 | } | |
880 | ||
881 | list_for_each_entry(cii, &dev->codec_list, list) { | |
882 | if (cii->codec_data == data) | |
883 | return -EALREADY; | |
884 | } | |
885 | ||
886 | if (!ci->transfers || !ci->transfers->formats | |
887 | || !ci->transfers->rates || !ci->usable) | |
888 | return -EINVAL; | |
889 | ||
890 | /* we currently code the i2s transfer on the clock, and support only | |
891 | * 32 and 64 */ | |
892 | if (ci->bus_factor != 32 && ci->bus_factor != 64) | |
893 | return -EINVAL; | |
894 | ||
895 | /* If you want to fix this, you need to keep track of what transport infos | |
896 | * are to be used, which codecs they belong to, and then fix all the | |
897 | * sysclock/busclock stuff above to depend on which is usable */ | |
898 | list_for_each_entry(cii, &dev->codec_list, list) { | |
899 | if (cii->codec->sysclock_factor != ci->sysclock_factor) { | |
900 | printk(KERN_DEBUG | |
901 | "cannot yet handle multiple different sysclocks!\n"); | |
902 | return -EINVAL; | |
903 | } | |
904 | if (cii->codec->bus_factor != ci->bus_factor) { | |
905 | printk(KERN_DEBUG | |
906 | "cannot yet handle multiple different bus clocks!\n"); | |
907 | return -EINVAL; | |
908 | } | |
909 | } | |
910 | ||
911 | tmp = ci->transfers; | |
912 | while (tmp->formats && tmp->rates) { | |
913 | if (tmp->transfer_in) | |
914 | in = 1; | |
915 | else | |
916 | out = 1; | |
917 | tmp++; | |
918 | } | |
919 | ||
920 | cii = kzalloc(sizeof(struct codec_info_item), GFP_KERNEL); | |
37d122c5 | 921 | if (!cii) |
f3d9478b | 922 | return -ENOMEM; |
f3d9478b JB |
923 | |
924 | /* use the private data to point to the codec info */ | |
925 | cii->sdev = soundbus_dev_get(dev); | |
926 | cii->codec = ci; | |
927 | cii->codec_data = data; | |
928 | ||
929 | if (!cii->sdev) { | |
930 | printk(KERN_DEBUG | |
931 | "i2sbus: failed to get soundbus dev reference\n"); | |
d595ee7e JB |
932 | err = -ENODEV; |
933 | goto out_free_cii; | |
f3d9478b JB |
934 | } |
935 | ||
936 | if (!try_module_get(THIS_MODULE)) { | |
937 | printk(KERN_DEBUG "i2sbus: failed to get module reference!\n"); | |
d595ee7e JB |
938 | err = -EBUSY; |
939 | goto out_put_sdev; | |
f3d9478b JB |
940 | } |
941 | ||
942 | if (!try_module_get(ci->owner)) { | |
943 | printk(KERN_DEBUG | |
944 | "i2sbus: failed to get module reference to codec owner!\n"); | |
d595ee7e JB |
945 | err = -EBUSY; |
946 | goto out_put_this_module; | |
f3d9478b JB |
947 | } |
948 | ||
949 | if (!dev->pcm) { | |
73e85fe8 | 950 | err = snd_pcm_new(card, dev->pcmname, dev->pcmid, 0, 0, |
f3d9478b JB |
951 | &dev->pcm); |
952 | if (err) { | |
953 | printk(KERN_DEBUG "i2sbus: failed to create pcm\n"); | |
d595ee7e | 954 | goto out_put_ci_module; |
f3d9478b JB |
955 | } |
956 | } | |
957 | ||
958 | /* ALSA yet again sucks. | |
959 | * If it is ever fixed, remove this line. See below. */ | |
960 | out = in = 1; | |
961 | ||
962 | if (!i2sdev->out.created && out) { | |
963 | if (dev->pcm->card != card) { | |
964 | /* eh? */ | |
965 | printk(KERN_ERR | |
966 | "Can't attach same bus to different cards!\n"); | |
d595ee7e JB |
967 | err = -EINVAL; |
968 | goto out_put_ci_module; | |
f3d9478b | 969 | } |
d595ee7e JB |
970 | err = snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, 1); |
971 | if (err) | |
972 | goto out_put_ci_module; | |
f3d9478b JB |
973 | snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, |
974 | &i2sbus_playback_ops); | |
ef46c7af TI |
975 | dev->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].dev.parent = |
976 | &dev->ofdev.dev; | |
f3d9478b JB |
977 | i2sdev->out.created = 1; |
978 | } | |
979 | ||
980 | if (!i2sdev->in.created && in) { | |
981 | if (dev->pcm->card != card) { | |
982 | printk(KERN_ERR | |
983 | "Can't attach same bus to different cards!\n"); | |
3d3909ff | 984 | err = -EINVAL; |
d595ee7e | 985 | goto out_put_ci_module; |
f3d9478b | 986 | } |
d595ee7e JB |
987 | err = snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, 1); |
988 | if (err) | |
989 | goto out_put_ci_module; | |
f3d9478b JB |
990 | snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, |
991 | &i2sbus_record_ops); | |
ef46c7af TI |
992 | dev->pcm->streams[SNDRV_PCM_STREAM_CAPTURE].dev.parent = |
993 | &dev->ofdev.dev; | |
f3d9478b JB |
994 | i2sdev->in.created = 1; |
995 | } | |
996 | ||
997 | /* so we have to register the pcm after adding any substream | |
998 | * to it because alsa doesn't create the devices for the | |
999 | * substreams when we add them later. | |
1000 | * Therefore, force in and out on both busses (above) and | |
1001 | * register the pcm now instead of just after creating it. | |
1002 | */ | |
1003 | err = snd_device_register(card, dev->pcm); | |
1004 | if (err) { | |
1005 | printk(KERN_ERR "i2sbus: error registering new pcm\n"); | |
d595ee7e | 1006 | goto out_put_ci_module; |
f3d9478b JB |
1007 | } |
1008 | /* no errors any more, so let's add this to our list */ | |
1009 | list_add(&cii->list, &dev->codec_list); | |
1010 | ||
1011 | dev->pcm->private_data = i2sdev; | |
1012 | dev->pcm->private_free = i2sbus_private_free; | |
1013 | ||
1014 | /* well, we really should support scatter/gather DMA */ | |
9b2433a9 | 1015 | snd_pcm_set_managed_buffer_all( |
f3d9478b | 1016 | dev->pcm, SNDRV_DMA_TYPE_DEV, |
3ca5fc06 | 1017 | &macio_get_pci_dev(i2sdev->macio)->dev, |
f3d9478b JB |
1018 | 64 * 1024, 64 * 1024); |
1019 | ||
1020 | return 0; | |
d595ee7e JB |
1021 | out_put_ci_module: |
1022 | module_put(ci->owner); | |
1023 | out_put_this_module: | |
1024 | module_put(THIS_MODULE); | |
1025 | out_put_sdev: | |
1026 | soundbus_dev_put(dev); | |
1027 | out_free_cii: | |
1028 | kfree(cii); | |
1029 | return err; | |
f3d9478b JB |
1030 | } |
1031 | ||
1032 | void i2sbus_detach_codec(struct soundbus_dev *dev, void *data) | |
1033 | { | |
1034 | struct codec_info_item *cii = NULL, *i; | |
1035 | ||
1036 | list_for_each_entry(i, &dev->codec_list, list) { | |
1037 | if (i->codec_data == data) { | |
1038 | cii = i; | |
1039 | break; | |
1040 | } | |
1041 | } | |
1042 | if (cii) { | |
1043 | list_del(&cii->list); | |
1044 | module_put(cii->codec->owner); | |
1045 | kfree(cii); | |
1046 | } | |
1047 | /* no more codecs, but still a pcm? */ | |
1048 | if (list_empty(&dev->codec_list) && dev->pcm) { | |
1049 | /* the actual cleanup is done by the callback above! */ | |
1050 | snd_device_free(dev->pcm->card, dev->pcm); | |
1051 | } | |
1052 | } |