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e5779998 DM |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2 of the License, or | |
5 | * (at your option) any later version. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
15 | */ | |
16 | ||
17 | #include <linux/init.h> | |
9966ddaf | 18 | #include <linux/slab.h> |
e5779998 DM |
19 | #include <linux/usb.h> |
20 | #include <linux/usb/audio.h> | |
7e847894 | 21 | #include <linux/usb/audio-v2.h> |
e5779998 DM |
22 | |
23 | #include <sound/core.h> | |
24 | #include <sound/pcm.h> | |
25 | #include <sound/pcm_params.h> | |
26 | ||
27 | #include "usbaudio.h" | |
28 | #include "card.h" | |
29 | #include "quirks.h" | |
30 | #include "debug.h" | |
31 | #include "urb.h" | |
32 | #include "helper.h" | |
33 | #include "pcm.h" | |
34 | ||
35 | /* | |
36 | * return the current pcm pointer. just based on the hwptr_done value. | |
37 | */ | |
38 | static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream) | |
39 | { | |
40 | struct snd_usb_substream *subs; | |
41 | unsigned int hwptr_done; | |
42 | ||
43 | subs = (struct snd_usb_substream *)substream->runtime->private_data; | |
44 | spin_lock(&subs->lock); | |
45 | hwptr_done = subs->hwptr_done; | |
46 | spin_unlock(&subs->lock); | |
47 | return hwptr_done / (substream->runtime->frame_bits >> 3); | |
48 | } | |
49 | ||
50 | /* | |
51 | * find a matching audio format | |
52 | */ | |
53 | static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format, | |
54 | unsigned int rate, unsigned int channels) | |
55 | { | |
56 | struct list_head *p; | |
57 | struct audioformat *found = NULL; | |
58 | int cur_attr = 0, attr; | |
59 | ||
60 | list_for_each(p, &subs->fmt_list) { | |
61 | struct audioformat *fp; | |
62 | fp = list_entry(p, struct audioformat, list); | |
015eb0b0 CL |
63 | if (!(fp->formats & (1uLL << format))) |
64 | continue; | |
65 | if (fp->channels != channels) | |
e5779998 DM |
66 | continue; |
67 | if (rate < fp->rate_min || rate > fp->rate_max) | |
68 | continue; | |
69 | if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) { | |
70 | unsigned int i; | |
71 | for (i = 0; i < fp->nr_rates; i++) | |
72 | if (fp->rate_table[i] == rate) | |
73 | break; | |
74 | if (i >= fp->nr_rates) | |
75 | continue; | |
76 | } | |
77 | attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE; | |
78 | if (! found) { | |
79 | found = fp; | |
80 | cur_attr = attr; | |
81 | continue; | |
82 | } | |
83 | /* avoid async out and adaptive in if the other method | |
84 | * supports the same format. | |
85 | * this is a workaround for the case like | |
86 | * M-audio audiophile USB. | |
87 | */ | |
88 | if (attr != cur_attr) { | |
89 | if ((attr == USB_ENDPOINT_SYNC_ASYNC && | |
90 | subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || | |
91 | (attr == USB_ENDPOINT_SYNC_ADAPTIVE && | |
92 | subs->direction == SNDRV_PCM_STREAM_CAPTURE)) | |
93 | continue; | |
94 | if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC && | |
95 | subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || | |
96 | (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE && | |
97 | subs->direction == SNDRV_PCM_STREAM_CAPTURE)) { | |
98 | found = fp; | |
99 | cur_attr = attr; | |
100 | continue; | |
101 | } | |
102 | } | |
103 | /* find the format with the largest max. packet size */ | |
104 | if (fp->maxpacksize > found->maxpacksize) { | |
105 | found = fp; | |
106 | cur_attr = attr; | |
107 | } | |
108 | } | |
109 | return found; | |
110 | } | |
111 | ||
767d75ad DM |
112 | static int init_pitch_v1(struct snd_usb_audio *chip, int iface, |
113 | struct usb_host_interface *alts, | |
114 | struct audioformat *fmt) | |
115 | { | |
116 | struct usb_device *dev = chip->dev; | |
117 | unsigned int ep; | |
118 | unsigned char data[1]; | |
119 | int err; | |
120 | ||
121 | ep = get_endpoint(alts, 0)->bEndpointAddress; | |
122 | ||
123 | /* if endpoint doesn't have pitch control, bail out */ | |
124 | if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL)) | |
125 | return 0; | |
126 | ||
127 | data[0] = 1; | |
128 | if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, | |
129 | USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, | |
130 | UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep, | |
131 | data, sizeof(data), 1000)) < 0) { | |
132 | snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n", | |
133 | dev->devnum, iface, ep); | |
134 | return err; | |
135 | } | |
136 | ||
137 | return 0; | |
138 | } | |
e5779998 DM |
139 | |
140 | /* | |
141 | * initialize the picth control and sample rate | |
142 | */ | |
767d75ad | 143 | int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface, |
e5779998 DM |
144 | struct usb_host_interface *alts, |
145 | struct audioformat *fmt) | |
146 | { | |
767d75ad DM |
147 | struct usb_interface_descriptor *altsd = get_iface_desc(alts); |
148 | ||
149 | switch (altsd->bInterfaceProtocol) { | |
150 | case UAC_VERSION_1: | |
151 | return init_pitch_v1(chip, iface, alts, fmt); | |
152 | ||
153 | case UAC_VERSION_2: | |
154 | /* not implemented yet */ | |
155 | return 0; | |
156 | } | |
157 | ||
158 | return -EINVAL; | |
159 | } | |
160 | ||
161 | static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface, | |
162 | struct usb_host_interface *alts, | |
163 | struct audioformat *fmt, int rate) | |
164 | { | |
165 | struct usb_device *dev = chip->dev; | |
e5779998 | 166 | unsigned int ep; |
767d75ad DM |
167 | unsigned char data[3]; |
168 | int err, crate; | |
e5779998 DM |
169 | |
170 | ep = get_endpoint(alts, 0)->bEndpointAddress; | |
767d75ad DM |
171 | /* if endpoint doesn't have sampling rate control, bail out */ |
172 | if (!(fmt->attributes & UAC_EP_CS_ATTR_SAMPLE_RATE)) { | |
173 | snd_printk(KERN_WARNING "%d:%d:%d: endpoint lacks sample rate attribute bit, cannot set.\n", | |
174 | dev->devnum, iface, fmt->altsetting); | |
175 | return 0; | |
176 | } | |
177 | ||
178 | data[0] = rate; | |
179 | data[1] = rate >> 8; | |
180 | data[2] = rate >> 16; | |
181 | if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, | |
182 | USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, | |
183 | UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, | |
184 | data, sizeof(data), 1000)) < 0) { | |
185 | snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep %#x\n", | |
186 | dev->devnum, iface, fmt->altsetting, rate, ep); | |
187 | return err; | |
188 | } | |
189 | if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC_GET_CUR, | |
190 | USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN, | |
191 | UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, | |
192 | data, sizeof(data), 1000)) < 0) { | |
193 | snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep %#x\n", | |
194 | dev->devnum, iface, fmt->altsetting, ep); | |
195 | return 0; /* some devices don't support reading */ | |
196 | } | |
197 | crate = data[0] | (data[1] << 8) | (data[2] << 16); | |
198 | if (crate != rate) { | |
199 | snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate); | |
200 | // runtime->rate = crate; | |
201 | } | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface, | |
207 | struct usb_host_interface *alts, | |
208 | struct audioformat *fmt, int rate) | |
209 | { | |
210 | struct usb_device *dev = chip->dev; | |
211 | unsigned char data[4]; | |
212 | int err, crate; | |
213 | ||
214 | data[0] = rate; | |
215 | data[1] = rate >> 8; | |
216 | data[2] = rate >> 16; | |
217 | data[3] = rate >> 24; | |
218 | if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, | |
219 | USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT, | |
7e847894 | 220 | UAC2_CS_CONTROL_SAM_FREQ << 8, chip->clock_id << 8, |
767d75ad DM |
221 | data, sizeof(data), 1000)) < 0) { |
222 | snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d (v2)\n", | |
223 | dev->devnum, iface, fmt->altsetting, rate); | |
224 | return err; | |
e5779998 | 225 | } |
767d75ad DM |
226 | if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR, |
227 | USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, | |
7e847894 | 228 | UAC2_CS_CONTROL_SAM_FREQ << 8, chip->clock_id << 8, |
767d75ad DM |
229 | data, sizeof(data), 1000)) < 0) { |
230 | snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq (v2)\n", | |
231 | dev->devnum, iface, fmt->altsetting); | |
232 | return err; | |
233 | } | |
234 | crate = data[0] | (data[1] << 8) | (data[2] << 16) | (data[3] << 24); | |
235 | if (crate != rate) | |
236 | snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate); | |
237 | ||
e5779998 DM |
238 | return 0; |
239 | } | |
240 | ||
767d75ad | 241 | int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface, |
e5779998 DM |
242 | struct usb_host_interface *alts, |
243 | struct audioformat *fmt, int rate) | |
244 | { | |
767d75ad | 245 | struct usb_interface_descriptor *altsd = get_iface_desc(alts); |
e5779998 | 246 | |
767d75ad DM |
247 | switch (altsd->bInterfaceProtocol) { |
248 | case UAC_VERSION_1: | |
249 | return set_sample_rate_v1(chip, iface, alts, fmt, rate); | |
250 | ||
251 | case UAC_VERSION_2: | |
252 | return set_sample_rate_v2(chip, iface, alts, fmt, rate); | |
e5779998 | 253 | } |
767d75ad DM |
254 | |
255 | return -EINVAL; | |
e5779998 DM |
256 | } |
257 | ||
258 | /* | |
259 | * find a matching format and set up the interface | |
260 | */ | |
261 | static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt) | |
262 | { | |
263 | struct usb_device *dev = subs->dev; | |
264 | struct usb_host_interface *alts; | |
265 | struct usb_interface_descriptor *altsd; | |
266 | struct usb_interface *iface; | |
267 | unsigned int ep, attr; | |
268 | int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; | |
269 | int err; | |
270 | ||
271 | iface = usb_ifnum_to_if(dev, fmt->iface); | |
272 | if (WARN_ON(!iface)) | |
273 | return -EINVAL; | |
274 | alts = &iface->altsetting[fmt->altset_idx]; | |
275 | altsd = get_iface_desc(alts); | |
276 | if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting)) | |
277 | return -EINVAL; | |
278 | ||
279 | if (fmt == subs->cur_audiofmt) | |
280 | return 0; | |
281 | ||
282 | /* close the old interface */ | |
283 | if (subs->interface >= 0 && subs->interface != fmt->iface) { | |
284 | if (usb_set_interface(subs->dev, subs->interface, 0) < 0) { | |
285 | snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n", | |
286 | dev->devnum, fmt->iface, fmt->altsetting); | |
287 | return -EIO; | |
288 | } | |
289 | subs->interface = -1; | |
e11b4e0e | 290 | subs->altset_idx = 0; |
e5779998 DM |
291 | } |
292 | ||
293 | /* set interface */ | |
e11b4e0e | 294 | if (subs->interface != fmt->iface || subs->altset_idx != fmt->altset_idx) { |
e5779998 DM |
295 | if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) { |
296 | snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n", | |
297 | dev->devnum, fmt->iface, fmt->altsetting); | |
298 | return -EIO; | |
299 | } | |
300 | snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting); | |
301 | subs->interface = fmt->iface; | |
e11b4e0e | 302 | subs->altset_idx = fmt->altset_idx; |
e5779998 DM |
303 | } |
304 | ||
305 | /* create a data pipe */ | |
306 | ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK; | |
307 | if (is_playback) | |
308 | subs->datapipe = usb_sndisocpipe(dev, ep); | |
309 | else | |
310 | subs->datapipe = usb_rcvisocpipe(dev, ep); | |
311 | subs->datainterval = fmt->datainterval; | |
312 | subs->syncpipe = subs->syncinterval = 0; | |
313 | subs->maxpacksize = fmt->maxpacksize; | |
314 | subs->fill_max = 0; | |
315 | ||
316 | /* we need a sync pipe in async OUT or adaptive IN mode */ | |
317 | /* check the number of EP, since some devices have broken | |
318 | * descriptors which fool us. if it has only one EP, | |
319 | * assume it as adaptive-out or sync-in. | |
320 | */ | |
321 | attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; | |
322 | if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) || | |
323 | (! is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) && | |
324 | altsd->bNumEndpoints >= 2) { | |
325 | /* check sync-pipe endpoint */ | |
326 | /* ... and check descriptor size before accessing bSynchAddress | |
327 | because there is a version of the SB Audigy 2 NX firmware lacking | |
328 | the audio fields in the endpoint descriptors */ | |
329 | if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 || | |
330 | (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && | |
331 | get_endpoint(alts, 1)->bSynchAddress != 0)) { | |
332 | snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n", | |
333 | dev->devnum, fmt->iface, fmt->altsetting); | |
334 | return -EINVAL; | |
335 | } | |
336 | ep = get_endpoint(alts, 1)->bEndpointAddress; | |
337 | if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && | |
338 | (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || | |
339 | (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) { | |
340 | snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n", | |
341 | dev->devnum, fmt->iface, fmt->altsetting); | |
342 | return -EINVAL; | |
343 | } | |
344 | ep &= USB_ENDPOINT_NUMBER_MASK; | |
345 | if (is_playback) | |
346 | subs->syncpipe = usb_rcvisocpipe(dev, ep); | |
347 | else | |
348 | subs->syncpipe = usb_sndisocpipe(dev, ep); | |
349 | if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && | |
350 | get_endpoint(alts, 1)->bRefresh >= 1 && | |
351 | get_endpoint(alts, 1)->bRefresh <= 9) | |
352 | subs->syncinterval = get_endpoint(alts, 1)->bRefresh; | |
353 | else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) | |
354 | subs->syncinterval = 1; | |
355 | else if (get_endpoint(alts, 1)->bInterval >= 1 && | |
356 | get_endpoint(alts, 1)->bInterval <= 16) | |
357 | subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1; | |
358 | else | |
359 | subs->syncinterval = 3; | |
360 | } | |
361 | ||
362 | /* always fill max packet size */ | |
363 | if (fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX) | |
364 | subs->fill_max = 1; | |
365 | ||
767d75ad | 366 | if ((err = snd_usb_init_pitch(subs->stream->chip, subs->interface, alts, fmt)) < 0) |
e5779998 DM |
367 | return err; |
368 | ||
369 | subs->cur_audiofmt = fmt; | |
370 | ||
371 | snd_usb_set_format_quirk(subs, fmt); | |
372 | ||
373 | #if 0 | |
374 | printk(KERN_DEBUG | |
375 | "setting done: format = %d, rate = %d..%d, channels = %d\n", | |
376 | fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels); | |
377 | printk(KERN_DEBUG | |
378 | " datapipe = 0x%0x, syncpipe = 0x%0x\n", | |
379 | subs->datapipe, subs->syncpipe); | |
380 | #endif | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
385 | /* | |
386 | * hw_params callback | |
387 | * | |
388 | * allocate a buffer and set the given audio format. | |
389 | * | |
390 | * so far we use a physically linear buffer although packetize transfer | |
391 | * doesn't need a continuous area. | |
392 | * if sg buffer is supported on the later version of alsa, we'll follow | |
393 | * that. | |
394 | */ | |
395 | static int snd_usb_hw_params(struct snd_pcm_substream *substream, | |
396 | struct snd_pcm_hw_params *hw_params) | |
397 | { | |
398 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
399 | struct audioformat *fmt; | |
400 | unsigned int channels, rate, format; | |
401 | int ret, changed; | |
402 | ||
403 | ret = snd_pcm_lib_alloc_vmalloc_buffer(substream, | |
404 | params_buffer_bytes(hw_params)); | |
405 | if (ret < 0) | |
406 | return ret; | |
407 | ||
408 | format = params_format(hw_params); | |
409 | rate = params_rate(hw_params); | |
410 | channels = params_channels(hw_params); | |
411 | fmt = find_format(subs, format, rate, channels); | |
412 | if (!fmt) { | |
413 | snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n", | |
414 | format, rate, channels); | |
415 | return -EINVAL; | |
416 | } | |
417 | ||
418 | changed = subs->cur_audiofmt != fmt || | |
419 | subs->period_bytes != params_period_bytes(hw_params) || | |
420 | subs->cur_rate != rate; | |
421 | if ((ret = set_format(subs, fmt)) < 0) | |
422 | return ret; | |
423 | ||
424 | if (subs->cur_rate != rate) { | |
425 | struct usb_host_interface *alts; | |
426 | struct usb_interface *iface; | |
427 | iface = usb_ifnum_to_if(subs->dev, fmt->iface); | |
428 | alts = &iface->altsetting[fmt->altset_idx]; | |
767d75ad | 429 | ret = snd_usb_init_sample_rate(subs->stream->chip, subs->interface, alts, fmt, rate); |
e5779998 DM |
430 | if (ret < 0) |
431 | return ret; | |
432 | subs->cur_rate = rate; | |
433 | } | |
434 | ||
435 | if (changed) { | |
436 | /* format changed */ | |
437 | snd_usb_release_substream_urbs(subs, 0); | |
438 | /* influenced: period_bytes, channels, rate, format, */ | |
439 | ret = snd_usb_init_substream_urbs(subs, params_period_bytes(hw_params), | |
440 | params_rate(hw_params), | |
441 | snd_pcm_format_physical_width(params_format(hw_params)) * | |
442 | params_channels(hw_params)); | |
443 | } | |
444 | ||
445 | return ret; | |
446 | } | |
447 | ||
448 | /* | |
449 | * hw_free callback | |
450 | * | |
451 | * reset the audio format and release the buffer | |
452 | */ | |
453 | static int snd_usb_hw_free(struct snd_pcm_substream *substream) | |
454 | { | |
455 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
456 | ||
457 | subs->cur_audiofmt = NULL; | |
458 | subs->cur_rate = 0; | |
459 | subs->period_bytes = 0; | |
460 | if (!subs->stream->chip->shutdown) | |
461 | snd_usb_release_substream_urbs(subs, 0); | |
462 | return snd_pcm_lib_free_vmalloc_buffer(substream); | |
463 | } | |
464 | ||
465 | /* | |
466 | * prepare callback | |
467 | * | |
468 | * only a few subtle things... | |
469 | */ | |
470 | static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) | |
471 | { | |
472 | struct snd_pcm_runtime *runtime = substream->runtime; | |
473 | struct snd_usb_substream *subs = runtime->private_data; | |
474 | ||
475 | if (! subs->cur_audiofmt) { | |
476 | snd_printk(KERN_ERR "usbaudio: no format is specified!\n"); | |
477 | return -ENXIO; | |
478 | } | |
479 | ||
480 | /* some unit conversions in runtime */ | |
481 | subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize); | |
482 | subs->curframesize = bytes_to_frames(runtime, subs->curpacksize); | |
483 | ||
484 | /* reset the pointer */ | |
485 | subs->hwptr_done = 0; | |
486 | subs->transfer_done = 0; | |
487 | subs->phase = 0; | |
488 | runtime->delay = 0; | |
489 | ||
490 | return snd_usb_substream_prepare(subs, runtime); | |
491 | } | |
492 | ||
493 | static struct snd_pcm_hardware snd_usb_hardware = | |
494 | { | |
495 | .info = SNDRV_PCM_INFO_MMAP | | |
496 | SNDRV_PCM_INFO_MMAP_VALID | | |
497 | SNDRV_PCM_INFO_BATCH | | |
498 | SNDRV_PCM_INFO_INTERLEAVED | | |
499 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
500 | SNDRV_PCM_INFO_PAUSE, | |
501 | .buffer_bytes_max = 1024 * 1024, | |
502 | .period_bytes_min = 64, | |
503 | .period_bytes_max = 512 * 1024, | |
504 | .periods_min = 2, | |
505 | .periods_max = 1024, | |
506 | }; | |
507 | ||
508 | static int hw_check_valid_format(struct snd_usb_substream *subs, | |
509 | struct snd_pcm_hw_params *params, | |
510 | struct audioformat *fp) | |
511 | { | |
512 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
513 | struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
514 | struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
515 | struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); | |
015eb0b0 | 516 | struct snd_mask check_fmts; |
e5779998 DM |
517 | unsigned int ptime; |
518 | ||
519 | /* check the format */ | |
015eb0b0 CL |
520 | snd_mask_none(&check_fmts); |
521 | check_fmts.bits[0] = (u32)fp->formats; | |
522 | check_fmts.bits[1] = (u32)(fp->formats >> 32); | |
523 | snd_mask_intersect(&check_fmts, fmts); | |
524 | if (snd_mask_empty(&check_fmts)) { | |
e5779998 DM |
525 | hwc_debug(" > check: no supported format %d\n", fp->format); |
526 | return 0; | |
527 | } | |
528 | /* check the channels */ | |
529 | if (fp->channels < ct->min || fp->channels > ct->max) { | |
530 | hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max); | |
531 | return 0; | |
532 | } | |
533 | /* check the rate is within the range */ | |
534 | if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { | |
535 | hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max); | |
536 | return 0; | |
537 | } | |
538 | if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { | |
539 | hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min); | |
540 | return 0; | |
541 | } | |
542 | /* check whether the period time is >= the data packet interval */ | |
543 | if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) { | |
544 | ptime = 125 * (1 << fp->datainterval); | |
545 | if (ptime > pt->max || (ptime == pt->max && pt->openmax)) { | |
546 | hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max); | |
547 | return 0; | |
548 | } | |
549 | } | |
550 | return 1; | |
551 | } | |
552 | ||
553 | static int hw_rule_rate(struct snd_pcm_hw_params *params, | |
554 | struct snd_pcm_hw_rule *rule) | |
555 | { | |
556 | struct snd_usb_substream *subs = rule->private; | |
557 | struct list_head *p; | |
558 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
559 | unsigned int rmin, rmax; | |
560 | int changed; | |
561 | ||
562 | hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max); | |
563 | changed = 0; | |
564 | rmin = rmax = 0; | |
565 | list_for_each(p, &subs->fmt_list) { | |
566 | struct audioformat *fp; | |
567 | fp = list_entry(p, struct audioformat, list); | |
568 | if (!hw_check_valid_format(subs, params, fp)) | |
569 | continue; | |
570 | if (changed++) { | |
571 | if (rmin > fp->rate_min) | |
572 | rmin = fp->rate_min; | |
573 | if (rmax < fp->rate_max) | |
574 | rmax = fp->rate_max; | |
575 | } else { | |
576 | rmin = fp->rate_min; | |
577 | rmax = fp->rate_max; | |
578 | } | |
579 | } | |
580 | ||
581 | if (!changed) { | |
582 | hwc_debug(" --> get empty\n"); | |
583 | it->empty = 1; | |
584 | return -EINVAL; | |
585 | } | |
586 | ||
587 | changed = 0; | |
588 | if (it->min < rmin) { | |
589 | it->min = rmin; | |
590 | it->openmin = 0; | |
591 | changed = 1; | |
592 | } | |
593 | if (it->max > rmax) { | |
594 | it->max = rmax; | |
595 | it->openmax = 0; | |
596 | changed = 1; | |
597 | } | |
598 | if (snd_interval_checkempty(it)) { | |
599 | it->empty = 1; | |
600 | return -EINVAL; | |
601 | } | |
602 | hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); | |
603 | return changed; | |
604 | } | |
605 | ||
606 | ||
607 | static int hw_rule_channels(struct snd_pcm_hw_params *params, | |
608 | struct snd_pcm_hw_rule *rule) | |
609 | { | |
610 | struct snd_usb_substream *subs = rule->private; | |
611 | struct list_head *p; | |
612 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
613 | unsigned int rmin, rmax; | |
614 | int changed; | |
615 | ||
616 | hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max); | |
617 | changed = 0; | |
618 | rmin = rmax = 0; | |
619 | list_for_each(p, &subs->fmt_list) { | |
620 | struct audioformat *fp; | |
621 | fp = list_entry(p, struct audioformat, list); | |
622 | if (!hw_check_valid_format(subs, params, fp)) | |
623 | continue; | |
624 | if (changed++) { | |
625 | if (rmin > fp->channels) | |
626 | rmin = fp->channels; | |
627 | if (rmax < fp->channels) | |
628 | rmax = fp->channels; | |
629 | } else { | |
630 | rmin = fp->channels; | |
631 | rmax = fp->channels; | |
632 | } | |
633 | } | |
634 | ||
635 | if (!changed) { | |
636 | hwc_debug(" --> get empty\n"); | |
637 | it->empty = 1; | |
638 | return -EINVAL; | |
639 | } | |
640 | ||
641 | changed = 0; | |
642 | if (it->min < rmin) { | |
643 | it->min = rmin; | |
644 | it->openmin = 0; | |
645 | changed = 1; | |
646 | } | |
647 | if (it->max > rmax) { | |
648 | it->max = rmax; | |
649 | it->openmax = 0; | |
650 | changed = 1; | |
651 | } | |
652 | if (snd_interval_checkempty(it)) { | |
653 | it->empty = 1; | |
654 | return -EINVAL; | |
655 | } | |
656 | hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); | |
657 | return changed; | |
658 | } | |
659 | ||
660 | static int hw_rule_format(struct snd_pcm_hw_params *params, | |
661 | struct snd_pcm_hw_rule *rule) | |
662 | { | |
663 | struct snd_usb_substream *subs = rule->private; | |
664 | struct list_head *p; | |
665 | struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
666 | u64 fbits; | |
667 | u32 oldbits[2]; | |
668 | int changed; | |
669 | ||
670 | hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]); | |
671 | fbits = 0; | |
672 | list_for_each(p, &subs->fmt_list) { | |
673 | struct audioformat *fp; | |
674 | fp = list_entry(p, struct audioformat, list); | |
675 | if (!hw_check_valid_format(subs, params, fp)) | |
676 | continue; | |
015eb0b0 | 677 | fbits |= fp->formats; |
e5779998 DM |
678 | } |
679 | ||
680 | oldbits[0] = fmt->bits[0]; | |
681 | oldbits[1] = fmt->bits[1]; | |
682 | fmt->bits[0] &= (u32)fbits; | |
683 | fmt->bits[1] &= (u32)(fbits >> 32); | |
684 | if (!fmt->bits[0] && !fmt->bits[1]) { | |
685 | hwc_debug(" --> get empty\n"); | |
686 | return -EINVAL; | |
687 | } | |
688 | changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); | |
689 | hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed); | |
690 | return changed; | |
691 | } | |
692 | ||
693 | static int hw_rule_period_time(struct snd_pcm_hw_params *params, | |
694 | struct snd_pcm_hw_rule *rule) | |
695 | { | |
696 | struct snd_usb_substream *subs = rule->private; | |
697 | struct audioformat *fp; | |
698 | struct snd_interval *it; | |
699 | unsigned char min_datainterval; | |
700 | unsigned int pmin; | |
701 | int changed; | |
702 | ||
703 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); | |
704 | hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max); | |
705 | min_datainterval = 0xff; | |
706 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
707 | if (!hw_check_valid_format(subs, params, fp)) | |
708 | continue; | |
709 | min_datainterval = min(min_datainterval, fp->datainterval); | |
710 | } | |
711 | if (min_datainterval == 0xff) { | |
712 | hwc_debug(" --> get emtpy\n"); | |
713 | it->empty = 1; | |
714 | return -EINVAL; | |
715 | } | |
716 | pmin = 125 * (1 << min_datainterval); | |
717 | changed = 0; | |
718 | if (it->min < pmin) { | |
719 | it->min = pmin; | |
720 | it->openmin = 0; | |
721 | changed = 1; | |
722 | } | |
723 | if (snd_interval_checkempty(it)) { | |
724 | it->empty = 1; | |
725 | return -EINVAL; | |
726 | } | |
727 | hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed); | |
728 | return changed; | |
729 | } | |
730 | ||
731 | /* | |
732 | * If the device supports unusual bit rates, does the request meet these? | |
733 | */ | |
734 | static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime, | |
735 | struct snd_usb_substream *subs) | |
736 | { | |
737 | struct audioformat *fp; | |
738 | int count = 0, needs_knot = 0; | |
739 | int err; | |
740 | ||
741 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
742 | if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) | |
743 | return 0; | |
744 | count += fp->nr_rates; | |
745 | if (fp->rates & SNDRV_PCM_RATE_KNOT) | |
746 | needs_knot = 1; | |
747 | } | |
748 | if (!needs_knot) | |
749 | return 0; | |
750 | ||
751 | subs->rate_list.count = count; | |
752 | subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL); | |
753 | subs->rate_list.mask = 0; | |
754 | count = 0; | |
755 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
756 | int i; | |
757 | for (i = 0; i < fp->nr_rates; i++) | |
758 | subs->rate_list.list[count++] = fp->rate_table[i]; | |
759 | } | |
760 | err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
761 | &subs->rate_list); | |
762 | if (err < 0) | |
763 | return err; | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
768 | ||
769 | /* | |
770 | * set up the runtime hardware information. | |
771 | */ | |
772 | ||
773 | static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) | |
774 | { | |
775 | struct list_head *p; | |
776 | unsigned int pt, ptmin; | |
777 | int param_period_time_if_needed; | |
778 | int err; | |
779 | ||
780 | runtime->hw.formats = subs->formats; | |
781 | ||
782 | runtime->hw.rate_min = 0x7fffffff; | |
783 | runtime->hw.rate_max = 0; | |
784 | runtime->hw.channels_min = 256; | |
785 | runtime->hw.channels_max = 0; | |
786 | runtime->hw.rates = 0; | |
787 | ptmin = UINT_MAX; | |
788 | /* check min/max rates and channels */ | |
789 | list_for_each(p, &subs->fmt_list) { | |
790 | struct audioformat *fp; | |
791 | fp = list_entry(p, struct audioformat, list); | |
792 | runtime->hw.rates |= fp->rates; | |
793 | if (runtime->hw.rate_min > fp->rate_min) | |
794 | runtime->hw.rate_min = fp->rate_min; | |
795 | if (runtime->hw.rate_max < fp->rate_max) | |
796 | runtime->hw.rate_max = fp->rate_max; | |
797 | if (runtime->hw.channels_min > fp->channels) | |
798 | runtime->hw.channels_min = fp->channels; | |
799 | if (runtime->hw.channels_max < fp->channels) | |
800 | runtime->hw.channels_max = fp->channels; | |
801 | if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) { | |
802 | /* FIXME: there might be more than one audio formats... */ | |
803 | runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = | |
804 | fp->frame_size; | |
805 | } | |
806 | pt = 125 * (1 << fp->datainterval); | |
807 | ptmin = min(ptmin, pt); | |
808 | } | |
809 | ||
810 | param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; | |
811 | if (snd_usb_get_speed(subs->dev) != USB_SPEED_HIGH) | |
812 | /* full speed devices have fixed data packet interval */ | |
813 | ptmin = 1000; | |
814 | if (ptmin == 1000) | |
815 | /* if period time doesn't go below 1 ms, no rules needed */ | |
816 | param_period_time_if_needed = -1; | |
817 | snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
818 | ptmin, UINT_MAX); | |
819 | ||
820 | if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
821 | hw_rule_rate, subs, | |
822 | SNDRV_PCM_HW_PARAM_FORMAT, | |
823 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
824 | param_period_time_if_needed, | |
825 | -1)) < 0) | |
826 | return err; | |
827 | if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
828 | hw_rule_channels, subs, | |
829 | SNDRV_PCM_HW_PARAM_FORMAT, | |
830 | SNDRV_PCM_HW_PARAM_RATE, | |
831 | param_period_time_if_needed, | |
832 | -1)) < 0) | |
833 | return err; | |
834 | if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
835 | hw_rule_format, subs, | |
836 | SNDRV_PCM_HW_PARAM_RATE, | |
837 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
838 | param_period_time_if_needed, | |
839 | -1)) < 0) | |
840 | return err; | |
841 | if (param_period_time_if_needed >= 0) { | |
842 | err = snd_pcm_hw_rule_add(runtime, 0, | |
843 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
844 | hw_rule_period_time, subs, | |
845 | SNDRV_PCM_HW_PARAM_FORMAT, | |
846 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
847 | SNDRV_PCM_HW_PARAM_RATE, | |
848 | -1); | |
849 | if (err < 0) | |
850 | return err; | |
851 | } | |
852 | if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0) | |
853 | return err; | |
854 | return 0; | |
855 | } | |
856 | ||
857 | static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction) | |
858 | { | |
859 | struct snd_usb_stream *as = snd_pcm_substream_chip(substream); | |
860 | struct snd_pcm_runtime *runtime = substream->runtime; | |
861 | struct snd_usb_substream *subs = &as->substream[direction]; | |
862 | ||
863 | subs->interface = -1; | |
e11b4e0e | 864 | subs->altset_idx = 0; |
e5779998 DM |
865 | runtime->hw = snd_usb_hardware; |
866 | runtime->private_data = subs; | |
867 | subs->pcm_substream = substream; | |
868 | return setup_hw_info(runtime, subs); | |
869 | } | |
870 | ||
871 | static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction) | |
872 | { | |
873 | struct snd_usb_stream *as = snd_pcm_substream_chip(substream); | |
874 | struct snd_usb_substream *subs = &as->substream[direction]; | |
875 | ||
876 | if (!as->chip->shutdown && subs->interface >= 0) { | |
877 | usb_set_interface(subs->dev, subs->interface, 0); | |
878 | subs->interface = -1; | |
879 | } | |
880 | subs->pcm_substream = NULL; | |
881 | return 0; | |
882 | } | |
883 | ||
884 | static int snd_usb_playback_open(struct snd_pcm_substream *substream) | |
885 | { | |
886 | return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK); | |
887 | } | |
888 | ||
889 | static int snd_usb_playback_close(struct snd_pcm_substream *substream) | |
890 | { | |
891 | return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK); | |
892 | } | |
893 | ||
894 | static int snd_usb_capture_open(struct snd_pcm_substream *substream) | |
895 | { | |
896 | return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE); | |
897 | } | |
898 | ||
899 | static int snd_usb_capture_close(struct snd_pcm_substream *substream) | |
900 | { | |
901 | return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE); | |
902 | } | |
903 | ||
904 | static struct snd_pcm_ops snd_usb_playback_ops = { | |
905 | .open = snd_usb_playback_open, | |
906 | .close = snd_usb_playback_close, | |
907 | .ioctl = snd_pcm_lib_ioctl, | |
908 | .hw_params = snd_usb_hw_params, | |
909 | .hw_free = snd_usb_hw_free, | |
910 | .prepare = snd_usb_pcm_prepare, | |
911 | .trigger = snd_usb_substream_playback_trigger, | |
912 | .pointer = snd_usb_pcm_pointer, | |
913 | .page = snd_pcm_lib_get_vmalloc_page, | |
914 | .mmap = snd_pcm_lib_mmap_vmalloc, | |
915 | }; | |
916 | ||
917 | static struct snd_pcm_ops snd_usb_capture_ops = { | |
918 | .open = snd_usb_capture_open, | |
919 | .close = snd_usb_capture_close, | |
920 | .ioctl = snd_pcm_lib_ioctl, | |
921 | .hw_params = snd_usb_hw_params, | |
922 | .hw_free = snd_usb_hw_free, | |
923 | .prepare = snd_usb_pcm_prepare, | |
924 | .trigger = snd_usb_substream_capture_trigger, | |
925 | .pointer = snd_usb_pcm_pointer, | |
926 | .page = snd_pcm_lib_get_vmalloc_page, | |
927 | .mmap = snd_pcm_lib_mmap_vmalloc, | |
928 | }; | |
929 | ||
930 | void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) | |
931 | { | |
932 | snd_pcm_set_ops(pcm, stream, | |
933 | stream == SNDRV_PCM_STREAM_PLAYBACK ? | |
934 | &snd_usb_playback_ops : &snd_usb_capture_ops); | |
935 | } |