diff options
| -rw-r--r-- | sound/usb/usbaudio.c | 93 |
1 files changed, 31 insertions, 62 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index e1a648d7ffff..a5e97d081c3b 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -177,7 +177,7 @@ struct snd_usb_substream { unsigned int nurbs; /* # urbs */ snd_urb_ctx_t dataurb[MAX_URBS]; /* data urb table */ snd_urb_ctx_t syncurb[SYNC_URBS]; /* sync urb table */ - char syncbuf[SYNC_URBS * MAX_PACKS * 4]; /* sync buffer; it's so small - let's get static */ + char syncbuf[SYNC_URBS * 4]; /* sync buffer; it's so small - let's get static */ char *tmpbuf; /* temporary buffer for playback */ u64 formats; /* format bitmasks (all or'ed) */ @@ -251,17 +251,13 @@ static int prepare_capture_sync_urb(snd_usb_substream_t *subs, { unsigned char *cp = urb->transfer_buffer; snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; - int i, offs; - urb->number_of_packets = ctx->packets; urb->dev = ctx->subs->dev; /* we need to set this at each time */ - for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4, cp += 4) { - urb->iso_frame_desc[i].length = 3; - urb->iso_frame_desc[i].offset = offs; - cp[0] = subs->freqn >> 2; - cp[1] = subs->freqn >> 10; - cp[2] = subs->freqn >> 18; - } + urb->iso_frame_desc[0].length = 3; + urb->iso_frame_desc[0].offset = 0; + cp[0] = subs->freqn >> 2; + cp[1] = subs->freqn >> 10; + cp[2] = subs->freqn >> 18; return 0; } @@ -277,18 +273,14 @@ static int prepare_capture_sync_urb_hs(snd_usb_substream_t *subs, { unsigned char *cp = urb->transfer_buffer; snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; - int i, offs; - urb->number_of_packets = ctx->packets; urb->dev = ctx->subs->dev; /* we need to set this at each time */ - for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4, cp += 4) { - urb->iso_frame_desc[i].length = 4; - urb->iso_frame_desc[i].offset = offs; - cp[0] = subs->freqn; - cp[1] = subs->freqn >> 8; - cp[2] = subs->freqn >> 16; - cp[3] = subs->freqn >> 24; - } + urb->iso_frame_desc[0].length = 4; + urb->iso_frame_desc[0].offset = 0; + cp[0] = subs->freqn; + cp[1] = subs->freqn >> 8; + cp[2] = subs->freqn >> 16; + cp[3] = subs->freqn >> 24; return 0; } @@ -418,15 +410,11 @@ static int prepare_playback_sync_urb(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *urb) { - int i, offs; snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; - urb->number_of_packets = ctx->packets; urb->dev = ctx->subs->dev; /* we need to set this at each time */ - for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4) { - urb->iso_frame_desc[i].length = 3; - urb->iso_frame_desc[i].offset = offs; - } + urb->iso_frame_desc[0].length = 3; + urb->iso_frame_desc[0].offset = 0; return 0; } @@ -440,15 +428,11 @@ static int prepare_playback_sync_urb_hs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *urb) { - int i, offs; snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; - urb->number_of_packets = ctx->packets; urb->dev = ctx->subs->dev; /* we need to set this at each time */ - for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4) { - urb->iso_frame_desc[i].length = 4; - urb->iso_frame_desc[i].offset = offs; - } + urb->iso_frame_desc[0].length = 4; + urb->iso_frame_desc[0].offset = 0; return 0; } @@ -462,17 +446,12 @@ static int retire_playback_sync_urb(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *urb) { - int i; - unsigned int f, found; - unsigned char *cp = urb->transfer_buffer; + unsigned int f; unsigned long flags; - found = 0; - for (i = 0; i < urb->number_of_packets; i++, cp += 4) { - if (urb->iso_frame_desc[i].status || - urb->iso_frame_desc[i].actual_length < 3) - continue; - f = combine_triple(cp) << 2; + if (urb->iso_frame_desc[0].status == 0 && + urb->iso_frame_desc[0].actual_length == 3) { + f = combine_triple((u8*)urb->transfer_buffer) << 2; #if 0 if (f < subs->freqn - (subs->freqn>>3) || f > subs->freqmax) { snd_printd(KERN_WARNING "requested frequency %d (%u,%03uHz) out of range (current nominal %d (%u,%03uHz))\n", @@ -481,11 +460,8 @@ static int retire_playback_sync_urb(snd_usb_substream_t *subs, continue; } #endif - found = f; - } - if (found) { spin_lock_irqsave(&subs->lock, flags); - subs->freqm = found; + subs->freqm = f; spin_unlock_irqrestore(&subs->lock, flags); } @@ -502,21 +478,14 @@ static int retire_playback_sync_urb_hs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *urb) { - int i; - unsigned int found; - unsigned char *cp = urb->transfer_buffer; + unsigned int f; unsigned long flags; - found = 0; - for (i = 0; i < urb->number_of_packets; i++, cp += 4) { - if (urb->iso_frame_desc[i].status || - urb->iso_frame_desc[i].actual_length < 4) - continue; - found = combine_quad(cp) & 0x0fffffff; - } - if (found) { + if (urb->iso_frame_desc[0].status == 0 && + urb->iso_frame_desc[0].actual_length == 4) { + f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff; spin_lock_irqsave(&subs->lock, flags); - subs->freqm = found; + subs->freqm = f; spin_unlock_irqrestore(&subs->lock, flags); } @@ -1039,18 +1008,18 @@ static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_by snd_urb_ctx_t *u = &subs->syncurb[i]; u->index = i; u->subs = subs; - u->packets = nrpacks; - u->urb = usb_alloc_urb(u->packets, GFP_KERNEL); + u->packets = 1; + u->urb = usb_alloc_urb(1, GFP_KERNEL); if (! u->urb) { release_substream_urbs(subs, 0); return -ENOMEM; } - u->urb->transfer_buffer = subs->syncbuf + i * nrpacks * 4; - u->urb->transfer_buffer_length = nrpacks * 4; + u->urb->transfer_buffer = subs->syncbuf + i * 4; + u->urb->transfer_buffer_length = 4; u->urb->dev = subs->dev; u->urb->pipe = subs->syncpipe; u->urb->transfer_flags = URB_ISO_ASAP; - u->urb->number_of_packets = u->packets; + u->urb->number_of_packets = 1; u->urb->interval = 1 << subs->syncinterval; u->urb->context = u; u->urb->complete = snd_usb_complete_callback(snd_complete_sync_urb); |
