| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Markus Grabner | 981 | 74.94% | 4 | 15.38% |
| Takashi Iwai | 148 | 11.31% | 6 | 23.08% |
| Andrej Krutak | 120 | 9.17% | 5 | 19.23% |
| Greg Kroah-Hartman | 24 | 1.83% | 2 | 7.69% |
| Chris Rorvick | 13 | 0.99% | 1 | 3.85% |
| Shawn Bohrer | 9 | 0.69% | 2 | 7.69% |
| Kees Cook | 5 | 0.38% | 1 | 3.85% |
| Stefan Hajnoczi | 3 | 0.23% | 1 | 3.85% |
| Thomas Gleixner | 2 | 0.15% | 1 | 3.85% |
| Tejun Heo | 2 | 0.15% | 1 | 3.85% |
| Bhumika Goyal | 1 | 0.08% | 1 | 3.85% |
| Peter Hüwe | 1 | 0.08% | 1 | 3.85% |
| Total | 1309 | 26 |
// SPDX-License-Identifier: GPL-2.0-only /* * Line 6 Linux USB driver * * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) */ #include <linux/slab.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include "capture.h" #include "driver.h" #include "pcm.h" /* Find a free URB and submit it. must be called in line6pcm->in.lock context */ static int submit_audio_in_urb(struct snd_line6_pcm *line6pcm) { int index; int i, urb_size; int ret; struct urb *urb_in; index = find_first_zero_bit(&line6pcm->in.active_urbs, line6pcm->line6->iso_buffers); if (index < 0 || index >= line6pcm->line6->iso_buffers) { dev_err(line6pcm->line6->ifcdev, "no free URB found\n"); return -EINVAL; } urb_in = line6pcm->in.urbs[index]; urb_size = 0; for (i = 0; i < LINE6_ISO_PACKETS; ++i) { struct usb_iso_packet_descriptor *fin = &urb_in->iso_frame_desc[i]; fin->offset = urb_size; fin->length = line6pcm->max_packet_size_in; urb_size += line6pcm->max_packet_size_in; } urb_in->transfer_buffer = line6pcm->in.buffer + index * LINE6_ISO_PACKETS * line6pcm->max_packet_size_in; urb_in->transfer_buffer_length = urb_size; urb_in->context = line6pcm; ret = usb_submit_urb(urb_in, GFP_ATOMIC); if (ret == 0) set_bit(index, &line6pcm->in.active_urbs); else dev_err(line6pcm->line6->ifcdev, "URB in #%d submission failed (%d)\n", index, ret); return 0; } /* Submit all currently available capture URBs. must be called in line6pcm->in.lock context */ int line6_submit_audio_in_all_urbs(struct snd_line6_pcm *line6pcm) { int ret = 0, i; for (i = 0; i < line6pcm->line6->iso_buffers; ++i) { ret = submit_audio_in_urb(line6pcm); if (ret < 0) break; } return ret; } /* Copy data into ALSA capture buffer. */ void line6_capture_copy(struct snd_line6_pcm *line6pcm, char *fbuf, int fsize) { struct snd_pcm_substream *substream = get_substream(line6pcm, SNDRV_PCM_STREAM_CAPTURE); struct snd_pcm_runtime *runtime = substream->runtime; const int bytes_per_frame = line6pcm->properties->bytes_per_channel * line6pcm->properties->capture_hw.channels_max; int frames = fsize / bytes_per_frame; if (runtime == NULL) return; if (line6pcm->in.pos_done + frames > runtime->buffer_size) { /* The transferred area goes over buffer boundary, copy two separate chunks. */ int len; len = runtime->buffer_size - line6pcm->in.pos_done; if (len > 0) { memcpy(runtime->dma_area + line6pcm->in.pos_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(line6pcm->line6->ifcdev, "driver bug: len = %d\n", len); } } else { /* copy single chunk */ memcpy(runtime->dma_area + line6pcm->in.pos_done * bytes_per_frame, fbuf, fsize); } line6pcm->in.pos_done += frames; if (line6pcm->in.pos_done >= runtime->buffer_size) line6pcm->in.pos_done -= runtime->buffer_size; } void line6_capture_check_period(struct snd_line6_pcm *line6pcm, int length) { struct snd_pcm_substream *substream = get_substream(line6pcm, SNDRV_PCM_STREAM_CAPTURE); line6pcm->in.bytes += length; if (line6pcm->in.bytes >= line6pcm->in.period) { line6pcm->in.bytes %= line6pcm->in.period; spin_unlock(&line6pcm->in.lock); snd_pcm_period_elapsed(substream); spin_lock(&line6pcm->in.lock); } } /* * Callback for completed capture URB. */ static void audio_in_callback(struct urb *urb) { int i, index, length = 0, shutdown = 0; unsigned long flags; struct snd_line6_pcm *line6pcm = (struct snd_line6_pcm *)urb->context; line6pcm->in.last_frame = urb->start_frame; /* find index of URB */ for (index = 0; index < line6pcm->line6->iso_buffers; ++index) if (urb == line6pcm->in.urbs[index]) break; spin_lock_irqsave(&line6pcm->in.lock, flags); for (i = 0; i < LINE6_ISO_PACKETS; ++i) { char *fbuf; int fsize; struct usb_iso_packet_descriptor *fin = &urb->iso_frame_desc[i]; if (fin->status == -EXDEV) { shutdown = 1; break; } fbuf = urb->transfer_buffer + fin->offset; fsize = fin->actual_length; if (fsize > line6pcm->max_packet_size_in) { dev_err(line6pcm->line6->ifcdev, "driver and/or device bug: packet too large (%d > %d)\n", fsize, line6pcm->max_packet_size_in); } length += fsize; BUILD_BUG_ON_MSG(LINE6_ISO_PACKETS != 1, "The following code assumes LINE6_ISO_PACKETS == 1"); /* TODO: * Also, if iso_buffers != 2, the prev frame is almost random at * playback side. * This needs to be redesigned. It should be "stable", but we may * experience sync problems on such high-speed configs. */ line6pcm->prev_fbuf = fbuf; line6pcm->prev_fsize = fsize / (line6pcm->properties->bytes_per_channel * line6pcm->properties->capture_hw.channels_max); if (!test_bit(LINE6_STREAM_IMPULSE, &line6pcm->in.running) && test_bit(LINE6_STREAM_PCM, &line6pcm->in.running) && fsize > 0) line6_capture_copy(line6pcm, fbuf, fsize); } clear_bit(index, &line6pcm->in.active_urbs); if (test_and_clear_bit(index, &line6pcm->in.unlink_urbs)) shutdown = 1; if (!shutdown) { submit_audio_in_urb(line6pcm); if (!test_bit(LINE6_STREAM_IMPULSE, &line6pcm->in.running) && test_bit(LINE6_STREAM_PCM, &line6pcm->in.running)) line6_capture_check_period(line6pcm, length); } spin_unlock_irqrestore(&line6pcm->in.lock, flags); } /* open capture callback */ static int snd_line6_capture_open(struct snd_pcm_substream *substream) { int err; struct snd_pcm_runtime *runtime = substream->runtime; 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->rates); if (err < 0) return err; line6_pcm_acquire(line6pcm, LINE6_STREAM_CAPTURE_HELPER, false); runtime->hw = line6pcm->properties->capture_hw; return 0; } /* close capture callback */ static int snd_line6_capture_close(struct snd_pcm_substream *substream) { struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); line6_pcm_release(line6pcm, LINE6_STREAM_CAPTURE_HELPER); return 0; } /* capture operators */ const struct snd_pcm_ops snd_line6_capture_ops = { .open = snd_line6_capture_open, .close = snd_line6_capture_close, .hw_params = snd_line6_hw_params, .hw_free = snd_line6_hw_free, .prepare = snd_line6_prepare, .trigger = snd_line6_trigger, .pointer = snd_line6_pointer, }; int line6_create_audio_in_urbs(struct snd_line6_pcm *line6pcm) { struct usb_line6 *line6 = line6pcm->line6; int i; line6pcm->in.urbs = kcalloc(line6->iso_buffers, sizeof(struct urb *), GFP_KERNEL); if (line6pcm->in.urbs == NULL) return -ENOMEM; /* create audio URBs and fill in constant values: */ for (i = 0; i < line6->iso_buffers; ++i) { struct urb *urb; /* URB for audio in: */ urb = line6pcm->in.urbs[i] = usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL); if (urb == NULL) return -ENOMEM; urb->dev = line6->usbdev; urb->pipe = usb_rcvisocpipe(line6->usbdev, line6->properties->ep_audio_r & USB_ENDPOINT_NUMBER_MASK); urb->transfer_flags = URB_ISO_ASAP; urb->start_frame = -1; urb->number_of_packets = LINE6_ISO_PACKETS; urb->interval = LINE6_ISO_INTERVAL; urb->error_count = 0; urb->complete = audio_in_callback; if (usb_urb_ep_type_check(urb)) return -EINVAL; } return 0; }