1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef USBUSX2Y_H 3 #define USBUSX2Y_H 4 #include "../usbaudio.h" 5 #include "../midi.h" 6 #include "usbus428ctldefs.h" 7 8 #define USX2Y_IN04_SIZE sizeof(struct us428_ctls) 9 10 #define NRURBS 2 11 12 /* Default value used for nr of packs per urb. 13 * 1 to 4 have been tested ok on uhci. 14 * To use 3 on ohci, you'd need a patch: 15 * look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on 16 * "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425" 17 * 18 * 1, 2 and 4 work out of the box on ohci, if I recall correctly. 19 * Bigger is safer operation, smaller gives lower latencies. 20 */ 21 #define USX2Y_NRPACKS 4 22 23 #define USX2Y_NRPACKS_MAX 1024 24 25 /* If your system works ok with this module's parameter 26 * nrpacks set to 1, you might as well comment 27 * this define out, and thereby produce smaller, faster code. 28 * You'd also set USX2Y_NRPACKS to 1 then. 29 */ 30 #define USX2Y_NRPACKS_VARIABLE 1 31 32 #ifdef USX2Y_NRPACKS_VARIABLE 33 extern int nrpacks; 34 #define nr_of_packs() nrpacks 35 #else 36 #define nr_of_packs() USX2Y_NRPACKS 37 #endif 38 39 #define URBS_ASYNC_SEQ 10 40 #define URB_DATA_LEN_ASYNC_SEQ 32 41 struct snd_usx2y_async_seq { 42 struct urb *urb[URBS_ASYNC_SEQ]; 43 char *buffer; 44 }; 45 46 struct snd_usx2y_urb_seq { 47 int submitted; 48 int len; 49 struct urb *urb[] __counted_by(len); 50 }; 51 52 #include "usx2yhwdeppcm.h" 53 54 struct usx2ydev { 55 struct usb_device *dev; 56 int card_index; 57 int stride; 58 struct urb *in04_urb; 59 void *in04_buf; 60 char in04_last[USX2Y_IN04_SIZE]; 61 unsigned int in04_int_calls; 62 struct snd_usx2y_urb_seq *us04; 63 wait_queue_head_t in04_wait_queue; 64 struct snd_usx2y_async_seq as04; 65 unsigned int rate, 66 format; 67 int chip_status; 68 struct mutex pcm_mutex; 69 struct us428ctls_sharedmem *us428ctls_sharedmem; 70 int wait_iso_frame; 71 wait_queue_head_t us428ctls_wait_queue_head; 72 struct snd_usx2y_hwdep_pcm_shm *hwdep_pcm_shm; 73 struct snd_usx2y_substream *subs[4]; 74 struct snd_usx2y_substream * volatile prepare_subs; 75 wait_queue_head_t prepare_wait_queue; 76 struct list_head midi_list; 77 int pcm_devs; 78 }; 79 80 81 struct snd_usx2y_substream { 82 struct usx2ydev *usx2y; 83 struct snd_pcm_substream *pcm_substream; 84 85 int endpoint; 86 unsigned int maxpacksize; /* max packet size in bytes */ 87 88 atomic_t state; 89 #define STATE_STOPPED 0 90 #define STATE_STARTING1 1 91 #define STATE_STARTING2 2 92 #define STATE_STARTING3 3 93 #define STATE_PREPARED 4 94 #define STATE_PRERUNNING 6 95 #define STATE_RUNNING 8 96 97 int hwptr; /* free frame position in the buffer (only for playback) */ 98 int hwptr_done; /* processed frame position in the buffer */ 99 int transfer_done; /* processed frames since last period update */ 100 101 struct urb *urb[NRURBS]; /* data urb table */ 102 struct urb *completed_urb; 103 char *tmpbuf; /* temporary buffer for playback */ 104 }; 105 106 107 #define usx2y(c) ((struct usx2ydev *)(c)->private_data) 108 109 int usx2y_audio_create(struct snd_card *card); 110 111 int usx2y_async_seq04_init(struct usx2ydev *usx2y); 112 int usx2y_in04_init(struct usx2ydev *usx2y); 113 114 #define NAME_ALLCAPS "US-X2Y" 115 116 #endif 117