e2439a5401
Avoid traversing the device object list of the card instance just for checking the PCM streams. The driver's private object already contains the array of substream pointers, so it can be simply looked through. The card internal may be restructured in future, thus better not to rely on it. Also, this fixes the possible deadlocks in PCM mutex. Instead of taking multiple PCM mutexes, just take the common mutex in all places. Along with it, rename prepare_mutex as pcm_mutex. Signed-off-by: Takashi Iwai <tiwai@suse.de>
89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
#ifndef USBUSX2Y_H
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#define USBUSX2Y_H
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#include "../usbaudio.h"
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#include "../midi.h"
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#include "usbus428ctldefs.h"
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#define NRURBS 2
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#define URBS_AsyncSeq 10
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#define URB_DataLen_AsyncSeq 32
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struct snd_usX2Y_AsyncSeq {
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struct urb *urb[URBS_AsyncSeq];
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char *buffer;
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};
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struct snd_usX2Y_urbSeq {
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int submitted;
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int len;
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struct urb *urb[0];
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};
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#include "usx2yhwdeppcm.h"
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struct usX2Ydev {
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struct usb_device *dev;
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int card_index;
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int stride;
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struct urb *In04urb;
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void *In04Buf;
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char In04Last[24];
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unsigned In04IntCalls;
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struct snd_usX2Y_urbSeq *US04;
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wait_queue_head_t In04WaitQueue;
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struct snd_usX2Y_AsyncSeq AS04;
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unsigned int rate,
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format;
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int chip_status;
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struct mutex pcm_mutex;
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struct us428ctls_sharedmem *us428ctls_sharedmem;
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int wait_iso_frame;
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wait_queue_head_t us428ctls_wait_queue_head;
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struct snd_usX2Y_hwdep_pcm_shm *hwdep_pcm_shm;
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struct snd_usX2Y_substream *subs[4];
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struct snd_usX2Y_substream * volatile prepare_subs;
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wait_queue_head_t prepare_wait_queue;
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struct list_head midi_list;
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struct list_head pcm_list;
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int pcm_devs;
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};
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struct snd_usX2Y_substream {
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struct usX2Ydev *usX2Y;
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struct snd_pcm_substream *pcm_substream;
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int endpoint;
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unsigned int maxpacksize; /* max packet size in bytes */
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atomic_t state;
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#define state_STOPPED 0
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#define state_STARTING1 1
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#define state_STARTING2 2
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#define state_STARTING3 3
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#define state_PREPARED 4
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#define state_PRERUNNING 6
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#define state_RUNNING 8
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int hwptr; /* free frame position in the buffer (only for playback) */
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int hwptr_done; /* processed frame position in the buffer */
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int transfer_done; /* processed frames since last period update */
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struct urb *urb[NRURBS]; /* data urb table */
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struct urb *completed_urb;
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char *tmpbuf; /* temporary buffer for playback */
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};
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#define usX2Y(c) ((struct usX2Ydev *)(c)->private_data)
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int usX2Y_audio_create(struct snd_card *card);
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int usX2Y_AsyncSeq04_init(struct usX2Ydev *usX2Y);
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int usX2Y_In04_init(struct usX2Ydev *usX2Y);
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#define NAME_ALLCAPS "US-X2Y"
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#endif
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