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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef USBUSX2Y_H
#define USBUSX2Y_H
#include "../usbaudio.h"
#include "../midi.h"
#include "usbus428ctldefs.h"
#define NRURBS 2
/* Default value used for nr of packs per urb.
* 1 to 4 have been tested ok on uhci.
* To use 3 on ohci, you'd need a patch:
* look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
* "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
*
* 1, 2 and 4 work out of the box on ohci, if I recall correctly.
* Bigger is safer operation, smaller gives lower latencies.
*/
#define USX2Y_NRPACKS 4
#define USX2Y_NRPACKS_MAX 1024
/* If your system works ok with this module's parameter
* nrpacks set to 1, you might as well comment
* this define out, and thereby produce smaller, faster code.
* You'd also set USX2Y_NRPACKS to 1 then.
*/
#define USX2Y_NRPACKS_VARIABLE 1
#ifdef USX2Y_NRPACKS_VARIABLE
extern int nrpacks;
#define nr_of_packs() nrpacks
#else
#define nr_of_packs() USX2Y_NRPACKS
#endif
#define URBS_ASYNC_SEQ 10
#define URB_DATA_LEN_ASYNC_SEQ 32
struct snd_usx2y_async_seq {
struct urb *urb[URBS_ASYNC_SEQ];
char *buffer;
};
struct snd_usx2y_urb_seq {
int submitted;
int len;
struct urb *urb[] __counted_by(len);
};
#include "usx2yhwdeppcm.h"
struct usx2ydev {
struct usb_device *dev;
int card_index;
int stride;
struct urb *in04_urb;
void *in04_buf;
char in04_last[24];
unsigned int in04_int_calls;
struct snd_usx2y_urb_seq *us04;
wait_queue_head_t in04_wait_queue;
struct snd_usx2y_async_seq as04;
unsigned int rate,
format;
int chip_status;
struct mutex pcm_mutex;
struct us428ctls_sharedmem *us428ctls_sharedmem;
int wait_iso_frame;
wait_queue_head_t us428ctls_wait_queue_head;
struct snd_usx2y_hwdep_pcm_shm *hwdep_pcm_shm;
struct snd_usx2y_substream *subs[4];
struct snd_usx2y_substream * volatile prepare_subs;
wait_queue_head_t prepare_wait_queue;
struct list_head midi_list;
int pcm_devs;
};
struct snd_usx2y_substream {
struct usx2ydev *usx2y;
struct snd_pcm_substream *pcm_substream;
int endpoint;
unsigned int maxpacksize; /* max packet size in bytes */
atomic_t state;
#define STATE_STOPPED 0
#define STATE_STARTING1 1
#define STATE_STARTING2 2
#define STATE_STARTING3 3
#define STATE_PREPARED 4
#define STATE_PRERUNNING 6
#define STATE_RUNNING 8
int hwptr; /* free frame position in the buffer (only for playback) */
int hwptr_done; /* processed frame position in the buffer */
int transfer_done; /* processed frames since last period update */
struct urb *urb[NRURBS]; /* data urb table */
struct urb *completed_urb;
char *tmpbuf; /* temporary buffer for playback */
};
#define usx2y(c) ((struct usx2ydev *)(c)->private_data)
int usx2y_audio_create(struct snd_card *card);
int usx2y_async_seq04_init(struct usx2ydev *usx2y);
int usx2y_in04_init(struct usx2ydev *usx2y);
#define NAME_ALLCAPS "US-X2Y"
#endif
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