diff options
-rw-r--r-- | drivers/staging/line6/playback.c | 95 |
1 files changed, 61 insertions, 34 deletions
diff --git a/drivers/staging/line6/playback.c b/drivers/staging/line6/playback.c index acb0612..4192cd9 100644 --- a/drivers/staging/line6/playback.c +++ b/drivers/staging/line6/playback.c @@ -20,7 +20,6 @@ #include "pod.h" #include "playback.h" - /* Software stereo volume control. */ @@ -30,7 +29,7 @@ static void change_volume(struct urb *urb_out, int volume[], int chn = 0; if (volume[0] == 256 && volume[1] == 256) - return; /* maximum volume - no change */ + return; /* maximum volume - no change */ if (bytes_per_frame == 4) { short *p, *buf_end; @@ -68,13 +67,17 @@ static int submit_audio_out_urb(struct snd_pcm_substream *substream) int i, urb_size, urb_frames; struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); const int bytes_per_frame = line6pcm->properties->bytes_per_frame; - const int frame_increment = line6pcm->properties->snd_line6_rates.rats[0].num_min; - const int frame_factor = line6pcm->properties->snd_line6_rates.rats[0].den * (USB_INTERVALS_PER_SECOND / LINE6_ISO_INTERVAL); + const int frame_increment = + line6pcm->properties->snd_line6_rates.rats[0].num_min; + const int frame_factor = + line6pcm->properties->snd_line6_rates.rats[0].den * + (USB_INTERVALS_PER_SECOND / LINE6_ISO_INTERVAL); struct snd_pcm_runtime *runtime = substream->runtime; struct urb *urb_out; spin_lock_irqsave(&line6pcm->lock_audio_out, flags); - index = find_first_zero_bit(&line6pcm->active_urb_out, LINE6_ISO_BUFFERS); + index = + find_first_zero_bit(&line6pcm->active_urb_out, LINE6_ISO_BUFFERS); if (index < 0 || index >= LINE6_ISO_BUFFERS) { spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); @@ -88,7 +91,8 @@ static int submit_audio_out_urb(struct snd_pcm_substream *substream) for (i = 0; i < LINE6_ISO_PACKETS; ++i) { /* compute frame size for given sampling rate */ int n, fs; - struct usb_iso_packet_descriptor *fout = &urb_out->iso_frame_desc[i]; + struct usb_iso_packet_descriptor *fout = + &urb_out->iso_frame_desc[i]; line6pcm->count_out += frame_increment; n = line6pcm->count_out / frame_factor; line6pcm->count_out -= n * frame_factor; @@ -106,21 +110,31 @@ static int submit_audio_out_urb(struct snd_pcm_substream *substream) } else { if (line6pcm->pos_out + urb_frames > runtime->buffer_size) { /* - The transferred area goes over buffer boundary, - copy the data to the temp buffer. - */ + The transferred area goes over buffer boundary, + copy the data to the temp buffer. + */ int len; len = runtime->buffer_size - line6pcm->pos_out; urb_out->transfer_buffer = line6pcm->wrap_out; if (len > 0) { - memcpy(line6pcm->wrap_out, runtime->dma_area + line6pcm->pos_out * bytes_per_frame, len * bytes_per_frame); - memcpy(line6pcm->wrap_out + len * bytes_per_frame, runtime->dma_area, (urb_frames - len) * bytes_per_frame); - } else - dev_err(s2m(substream), "driver bug: len = %d\n", len); /* this is somewhat paranoid */ + memcpy(line6pcm->wrap_out, + runtime->dma_area + + line6pcm->pos_out * bytes_per_frame, + len * bytes_per_frame); + memcpy(line6pcm->wrap_out + + len * bytes_per_frame, runtime->dma_area, + (urb_frames - len) * bytes_per_frame); + } else { + /* this is somewhat paranoid */ + dev_err(s2m(substream), + "driver bug: len = %d\n", len); + } } else { /* set the buffer pointer */ - urb_out->transfer_buffer = runtime->dma_area + line6pcm->pos_out * bytes_per_frame; + urb_out->transfer_buffer = + runtime->dma_area + + line6pcm->pos_out * bytes_per_frame; } } @@ -133,15 +147,19 @@ static int submit_audio_out_urb(struct snd_pcm_substream *substream) #if DO_DUMP_PCM_SEND for (i = 0; i < LINE6_ISO_PACKETS; ++i) { - struct usb_iso_packet_descriptor *fout = &urb_out->iso_frame_desc[i]; - line6_write_hexdump(line6pcm->line6, 'P', urb_out->transfer_buffer + fout->offset, fout->length); + struct usb_iso_packet_descriptor *fout = + &urb_out->iso_frame_desc[i]; + line6_write_hexdump(line6pcm->line6, 'P', + urb_out->transfer_buffer + fout->offset, + fout->length); } #endif if (usb_submit_urb(urb_out, GFP_ATOMIC) == 0) set_bit(index, &line6pcm->active_urb_out); else - dev_err(s2m(substream), "URB out #%d submission failed\n", index); + dev_err(s2m(substream), "URB out #%d submission failed\n", + index); spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); return 0; @@ -181,7 +199,7 @@ static void unlink_audio_out_urbs(struct snd_line6_pcm *line6pcm) } /* - Wait until unlinking of all currently active playback URBs has been finished. + Wait until unlinking of all currently active playback URBs has been finished. */ static void wait_clear_audio_out_urbs(struct snd_line6_pcm *line6pcm) { @@ -224,7 +242,8 @@ static void audio_out_callback(struct urb *urb) int i, index, length = 0, shutdown = 0; unsigned long flags; - struct snd_pcm_substream *substream = (struct snd_pcm_substream *)urb->context; + struct snd_pcm_substream *substream = + (struct snd_pcm_substream *)urb->context; struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; @@ -234,13 +253,14 @@ static void audio_out_callback(struct urb *urb) break; if (index < 0) - return; /* URB has been unlinked asynchronously */ + return; /* URB has been unlinked asynchronously */ for (i = LINE6_ISO_PACKETS; i--;) length += urb->iso_frame_desc[i].length; spin_lock_irqsave(&line6pcm->lock_audio_out, flags); - line6pcm->pos_out_done += length / line6pcm->properties->bytes_per_frame; + line6pcm->pos_out_done += + length / line6pcm->properties->bytes_per_frame; if (line6pcm->pos_out_done >= runtime->buffer_size) line6pcm->pos_out_done -= runtime->buffer_size; @@ -276,7 +296,8 @@ static int snd_line6_playback_open(struct snd_pcm_substream *substream) struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); err = snd_pcm_hw_constraint_ratdens(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, - (&line6pcm->properties->snd_line6_rates)); + (&line6pcm->properties-> + snd_line6_rates)); if (err < 0) return err; @@ -291,7 +312,8 @@ static int snd_line6_playback_close(struct snd_pcm_substream *substream) } /* hw_params playback callback */ -static int snd_line6_playback_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) +static int snd_line6_playback_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) { int ret; struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); @@ -349,7 +371,8 @@ int snd_line6_playback_trigger(struct snd_pcm_substream *substream, int cmd) err = submit_audio_out_all_urbs(substream); if (err < 0) { - clear_bit(BIT_RUNNING_PLAYBACK, &line6pcm->flags); + clear_bit(BIT_RUNNING_PLAYBACK, + &line6pcm->flags); return err; } } @@ -387,14 +410,14 @@ snd_line6_playback_pointer(struct snd_pcm_substream *substream) /* playback operators */ struct snd_pcm_ops snd_line6_playback_ops = { - .open = snd_line6_playback_open, - .close = snd_line6_playback_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = snd_line6_playback_hw_params, - .hw_free = snd_line6_playback_hw_free, - .prepare = snd_line6_prepare, - .trigger = snd_line6_trigger, - .pointer = snd_line6_playback_pointer, + .open = snd_line6_playback_open, + .close = snd_line6_playback_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = snd_line6_playback_hw_params, + .hw_free = snd_line6_playback_hw_free, + .prepare = snd_line6_prepare, + .trigger = snd_line6_trigger, + .pointer = snd_line6_playback_pointer, }; int create_audio_out_urbs(struct snd_line6_pcm *line6pcm) @@ -406,7 +429,8 @@ int create_audio_out_urbs(struct snd_line6_pcm *line6pcm) struct urb *urb; /* URB for audio out: */ - urb = line6pcm->urb_audio_out[i] = usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL); + urb = line6pcm->urb_audio_out[i] = + usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL); if (urb == NULL) { dev_err(line6pcm->line6->ifcdev, "Out of memory\n"); @@ -414,7 +438,10 @@ int create_audio_out_urbs(struct snd_line6_pcm *line6pcm) } urb->dev = line6pcm->line6->usbdev; - urb->pipe = usb_sndisocpipe(line6pcm->line6->usbdev, line6pcm->ep_audio_write & USB_ENDPOINT_NUMBER_MASK); + urb->pipe = + usb_sndisocpipe(line6pcm->line6->usbdev, + line6pcm-> + ep_audio_write & USB_ENDPOINT_NUMBER_MASK); urb->transfer_flags = URB_ISO_ASAP; urb->start_frame = -1; urb->number_of_packets = LINE6_ISO_PACKETS; |