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path: root/drivers/staging/line6/capture.c
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Diffstat (limited to 'drivers/staging/line6/capture.c')
-rw-r--r--drivers/staging/line6/capture.c98
1 files changed, 65 insertions, 33 deletions
diff --git a/drivers/staging/line6/capture.c b/drivers/staging/line6/capture.c
index ea2060b4919d..fd4890de8dbc 100644
--- a/drivers/staging/line6/capture.c
+++ b/drivers/staging/line6/capture.c
@@ -20,7 +20,6 @@
#include "pod.h"
#include "capture.h"
-
/*
Find a free URB and submit it.
*/
@@ -33,7 +32,8 @@ static int submit_audio_in_urb(struct snd_pcm_substream *substream)
struct urb *urb_in;
spin_lock_irqsave(&line6pcm->lock_audio_in, flags);
- index = find_first_zero_bit(&line6pcm->active_urb_in, LINE6_ISO_BUFFERS);
+ index =
+ find_first_zero_bit(&line6pcm->active_urb_in, LINE6_ISO_BUFFERS);
if (index >= LINE6_ISO_BUFFERS) {
spin_unlock_irqrestore(&line6pcm->lock_audio_in, flags);
@@ -45,20 +45,24 @@ static int submit_audio_in_urb(struct snd_pcm_substream *substream)
urb_size = 0;
for (i = 0; i < LINE6_ISO_PACKETS; ++i) {
- struct usb_iso_packet_descriptor *fin = &urb_in->iso_frame_desc[i];
+ struct usb_iso_packet_descriptor *fin =
+ &urb_in->iso_frame_desc[i];
fin->offset = urb_size;
fin->length = line6pcm->max_packet_size;
urb_size += line6pcm->max_packet_size;
}
- urb_in->transfer_buffer = line6pcm->buffer_in + index * LINE6_ISO_PACKETS * line6pcm->max_packet_size;
+ urb_in->transfer_buffer =
+ line6pcm->buffer_in +
+ index * LINE6_ISO_PACKETS * line6pcm->max_packet_size;
urb_in->transfer_buffer_length = urb_size;
urb_in->context = substream;
if (usb_submit_urb(urb_in, GFP_ATOMIC) == 0)
set_bit(index, &line6pcm->active_urb_in);
else
- dev_err(s2m(substream), "URB in #%d submission failed\n", index);
+ dev_err(s2m(substream), "URB in #%d submission failed\n",
+ index);
spin_unlock_irqrestore(&line6pcm->lock_audio_in, flags);
return 0;
@@ -143,7 +147,8 @@ static void audio_in_callback(struct urb *urb)
int frames;
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);
const int bytes_per_frame = line6pcm->properties->bytes_per_frame;
struct snd_pcm_runtime *runtime = substream->runtime;
@@ -155,8 +160,11 @@ static void audio_in_callback(struct urb *urb)
#if DO_DUMP_PCM_RECEIVE
for (i = 0; i < LINE6_ISO_PACKETS; ++i) {
- struct usb_iso_packet_descriptor *fout = &urb->iso_frame_desc[i];
- line6_write_hexdump(line6pcm->line6, 'C', urb->transfer_buffer + fout->offset, fout->length);
+ struct usb_iso_packet_descriptor *fout =
+ &urb->iso_frame_desc[i];
+ line6_write_hexdump(line6pcm->line6, 'C',
+ urb->transfer_buffer + fout->offset,
+ fout->length);
}
#endif
@@ -179,25 +187,40 @@ static void audio_in_callback(struct urb *urb)
if (fsize > 0) {
frames = fsize / bytes_per_frame;
- if (line6pcm->pos_in_done + frames > runtime->buffer_size) {
+ if (line6pcm->pos_in_done + frames >
+ runtime->buffer_size) {
/*
- The transferred area goes over buffer boundary,
- copy two separate chunks.
- */
+ The transferred area goes over buffer
+ boundary, copy two separate chunks.
+ */
int len;
- len = runtime->buffer_size - line6pcm->pos_in_done;
+ len =
+ runtime->buffer_size -
+ line6pcm->pos_in_done;
if (len > 0) {
- memcpy(runtime->dma_area + line6pcm->pos_in_done * bytes_per_frame, fbuf, len * bytes_per_frame);
- memcpy(runtime->dma_area, fbuf + len * bytes_per_frame, (frames - len) * bytes_per_frame);
- } else
- dev_err(s2m(substream), "driver bug: len = %d\n", len); /* this is somewhat paranoid */
+ memcpy(runtime->dma_area +
+ line6pcm->pos_in_done *
+ bytes_per_frame, fbuf,
+ len * bytes_per_frame);
+ memcpy(runtime->dma_area,
+ fbuf + len * bytes_per_frame,
+ (frames -
+ len) * bytes_per_frame);
+ } else {
+ /* this is somewhat paranoid */
+ dev_err(s2m(substream),
+ "driver bug: len = %d\n", len);
+ }
} else {
/* copy single chunk */
- memcpy(runtime->dma_area + line6pcm->pos_in_done * bytes_per_frame, fbuf, fsize * bytes_per_frame);
+ memcpy(runtime->dma_area +
+ line6pcm->pos_in_done * bytes_per_frame,
+ fbuf, fsize * bytes_per_frame);
}
- if ((line6pcm->pos_in_done += frames) >= runtime->buffer_size)
+ line6pcm->pos_in_done += frames;
+ if (line6pcm->pos_in_done >= runtime->buffer_size)
line6pcm->pos_in_done -= runtime->buffer_size;
}
}
@@ -212,7 +235,8 @@ static void audio_in_callback(struct urb *urb)
if (!shutdown) {
submit_audio_in_urb(substream);
- if ((line6pcm->bytes_in += length) >= line6pcm->period_in) {
+ line6pcm->bytes_in += length;
+ if (line6pcm->bytes_in >= line6pcm->period_in) {
line6pcm->bytes_in -= line6pcm->period_in;
snd_pcm_period_elapsed(substream);
}
@@ -228,7 +252,8 @@ static int snd_line6_capture_open(struct snd_pcm_substream *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;
@@ -267,7 +292,9 @@ static int snd_line6_capture_hw_params(struct snd_pcm_substream *substream,
return ret;
line6pcm->period_in = params_period_bytes(hw_params);
- line6pcm->buffer_in = kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS * LINE6_ISO_PACKET_SIZE_MAX, GFP_KERNEL);
+ line6pcm->buffer_in =
+ kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
+ LINE6_ISO_PACKET_SIZE_MAX, GFP_KERNEL);
if (!line6pcm->buffer_in) {
dev_err(s2m(substream), "cannot malloc buffer_in\n");
@@ -302,7 +329,8 @@ int snd_line6_capture_trigger(struct snd_pcm_substream *substream, int cmd)
err = submit_audio_in_all_urbs(substream);
if (err < 0) {
- clear_bit(BIT_RUNNING_CAPTURE, &line6pcm->flags);
+ clear_bit(BIT_RUNNING_CAPTURE,
+ &line6pcm->flags);
return err;
}
}
@@ -332,14 +360,14 @@ snd_line6_capture_pointer(struct snd_pcm_substream *substream)
/* capture operators */
struct snd_pcm_ops snd_line6_capture_ops = {
- .open = snd_line6_capture_open,
- .close = snd_line6_capture_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = snd_line6_capture_hw_params,
- .hw_free = snd_line6_capture_hw_free,
- .prepare = snd_line6_prepare,
- .trigger = snd_line6_trigger,
- .pointer = snd_line6_capture_pointer,
+ .open = snd_line6_capture_open,
+ .close = snd_line6_capture_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_line6_capture_hw_params,
+ .hw_free = snd_line6_capture_hw_free,
+ .prepare = snd_line6_prepare,
+ .trigger = snd_line6_trigger,
+ .pointer = snd_line6_capture_pointer,
};
int create_audio_in_urbs(struct snd_line6_pcm *line6pcm)
@@ -351,7 +379,8 @@ int create_audio_in_urbs(struct snd_line6_pcm *line6pcm)
struct urb *urb;
/* URB for audio in: */
- urb = line6pcm->urb_audio_in[i] = usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL);
+ urb = line6pcm->urb_audio_in[i] =
+ usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL);
if (urb == NULL) {
dev_err(line6pcm->line6->ifcdev, "Out of memory\n");
@@ -359,7 +388,10 @@ int create_audio_in_urbs(struct snd_line6_pcm *line6pcm)
}
urb->dev = line6pcm->line6->usbdev;
- urb->pipe = usb_rcvisocpipe(line6pcm->line6->usbdev, line6pcm->ep_audio_read & USB_ENDPOINT_NUMBER_MASK);
+ urb->pipe =
+ usb_rcvisocpipe(line6pcm->line6->usbdev,
+ line6pcm->
+ ep_audio_read & USB_ENDPOINT_NUMBER_MASK);
urb->transfer_flags = URB_ISO_ASAP;
urb->start_frame = -1;
urb->number_of_packets = LINE6_ISO_PACKETS;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.