2009-02-27 20:43:04 -07:00
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/*
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2010-08-22 17:08:25 -06:00
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* Line6 Linux USB driver - 0.9.1beta
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2009-02-27 20:43:04 -07:00
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*
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2010-08-11 17:35:30 -06:00
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* Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
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2009-02-27 20:43:04 -07:00
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2.
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*
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*/
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2011-11-23 01:20:45 -07:00
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#include <linux/slab.h>
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2009-02-27 20:43:04 -07:00
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include "audio.h"
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2010-08-11 17:35:30 -06:00
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#include "capture.h"
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#include "driver.h"
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2009-02-27 20:43:04 -07:00
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#include "pcm.h"
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#include "pod.h"
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2010-08-11 17:35:30 -06:00
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2009-02-27 20:43:04 -07:00
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/*
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Find a free URB and submit it.
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*/
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2010-08-11 17:35:30 -06:00
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static int submit_audio_in_urb(struct snd_line6_pcm *line6pcm)
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2009-02-27 20:43:04 -07:00
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{
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2010-08-11 17:35:30 -06:00
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int index;
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2009-02-27 20:43:04 -07:00
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unsigned long flags;
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int i, urb_size;
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2010-08-22 17:08:25 -06:00
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int ret;
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2009-02-27 20:43:04 -07:00
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struct urb *urb_in;
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spin_lock_irqsave(&line6pcm->lock_audio_in, flags);
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2009-11-15 21:17:52 -07:00
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index =
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find_first_zero_bit(&line6pcm->active_urb_in, LINE6_ISO_BUFFERS);
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2009-02-27 20:43:04 -07:00
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2010-08-11 17:35:30 -06:00
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if (index < 0 || index >= LINE6_ISO_BUFFERS) {
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2009-02-27 20:43:04 -07:00
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spin_unlock_irqrestore(&line6pcm->lock_audio_in, flags);
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2010-08-11 17:35:30 -06:00
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dev_err(line6pcm->line6->ifcdev, "no free URB found\n");
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2009-02-27 20:43:04 -07:00
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return -EINVAL;
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}
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urb_in = line6pcm->urb_audio_in[index];
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urb_size = 0;
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2009-02-27 23:39:22 -07:00
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for (i = 0; i < LINE6_ISO_PACKETS; ++i) {
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2009-11-15 21:17:52 -07:00
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struct usb_iso_packet_descriptor *fin =
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&urb_in->iso_frame_desc[i];
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2009-02-27 20:43:04 -07:00
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fin->offset = urb_size;
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fin->length = line6pcm->max_packet_size;
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urb_size += line6pcm->max_packet_size;
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}
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2009-11-15 21:17:52 -07:00
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urb_in->transfer_buffer =
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line6pcm->buffer_in +
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index * LINE6_ISO_PACKETS * line6pcm->max_packet_size;
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2009-02-27 20:43:04 -07:00
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urb_in->transfer_buffer_length = urb_size;
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2010-08-11 17:35:30 -06:00
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urb_in->context = line6pcm;
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2009-02-27 20:43:04 -07:00
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2010-08-22 17:08:25 -06:00
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ret = usb_submit_urb(urb_in, GFP_ATOMIC);
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if (ret == 0)
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2009-02-27 20:43:04 -07:00
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set_bit(index, &line6pcm->active_urb_in);
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else
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2010-08-11 17:35:30 -06:00
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dev_err(line6pcm->line6->ifcdev,
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2010-08-22 17:08:25 -06:00
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"URB in #%d submission failed (%d)\n", index, ret);
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2009-02-27 20:43:04 -07:00
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spin_unlock_irqrestore(&line6pcm->lock_audio_in, flags);
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return 0;
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}
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/*
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Submit all currently available capture URBs.
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*/
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2010-08-11 17:35:30 -06:00
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int line6_submit_audio_in_all_urbs(struct snd_line6_pcm *line6pcm)
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2009-02-27 20:43:04 -07:00
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{
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int ret, i;
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2009-02-27 23:39:22 -07:00
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for (i = 0; i < LINE6_ISO_BUFFERS; ++i) {
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2010-08-11 17:35:30 -06:00
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ret = submit_audio_in_urb(line6pcm);
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2009-02-27 23:39:22 -07:00
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if (ret < 0)
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2009-02-27 20:43:04 -07:00
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return ret;
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2009-02-27 23:39:22 -07:00
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}
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2009-02-27 20:43:04 -07:00
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return 0;
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}
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/*
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Unlink all currently active capture URBs.
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*/
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2010-08-11 17:35:30 -06:00
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void line6_unlink_audio_in_urbs(struct snd_line6_pcm *line6pcm)
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2009-02-27 20:43:04 -07:00
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{
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unsigned int i;
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2009-02-27 23:39:22 -07:00
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for (i = LINE6_ISO_BUFFERS; i--;) {
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if (test_bit(i, &line6pcm->active_urb_in)) {
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if (!test_and_set_bit(i, &line6pcm->unlink_urb_in)) {
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2009-02-27 20:43:04 -07:00
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struct urb *u = line6pcm->urb_audio_in[i];
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usb_unlink_urb(u);
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}
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}
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}
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}
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/*
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2009-02-27 23:39:22 -07:00
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Wait until unlinking of all currently active capture URBs has been
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finished.
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2009-02-27 20:43:04 -07:00
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*/
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2012-01-19 16:09:09 -07:00
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void line6_wait_clear_audio_in_urbs(struct snd_line6_pcm *line6pcm)
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2009-02-27 20:43:04 -07:00
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{
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int timeout = HZ;
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unsigned int i;
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int alive;
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do {
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alive = 0;
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for (i = LINE6_ISO_BUFFERS; i--;) {
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if (test_bit(i, &line6pcm->active_urb_in))
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alive++;
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}
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2009-02-27 23:39:22 -07:00
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if (!alive)
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2009-02-27 20:43:04 -07:00
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break;
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set_current_state(TASK_UNINTERRUPTIBLE);
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schedule_timeout(1);
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} while (--timeout > 0);
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if (alive)
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snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
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}
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/*
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Unlink all currently active capture URBs, and wait for finishing.
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*/
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2010-08-11 17:35:30 -06:00
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void line6_unlink_wait_clear_audio_in_urbs(struct snd_line6_pcm *line6pcm)
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2009-02-27 20:43:04 -07:00
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{
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2010-08-11 17:35:30 -06:00
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line6_unlink_audio_in_urbs(line6pcm);
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2012-01-19 16:09:09 -07:00
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line6_wait_clear_audio_in_urbs(line6pcm);
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2009-02-27 20:43:04 -07:00
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}
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/*
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2010-08-11 17:35:30 -06:00
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Copy data into ALSA capture buffer.
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*/
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void line6_capture_copy(struct snd_line6_pcm *line6pcm, char *fbuf, int fsize)
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{
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struct snd_pcm_substream *substream =
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get_substream(line6pcm, SNDRV_PCM_STREAM_CAPTURE);
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struct snd_pcm_runtime *runtime = substream->runtime;
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const int bytes_per_frame = line6pcm->properties->bytes_per_frame;
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int frames = fsize / bytes_per_frame;
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2010-12-07 15:38:02 -07:00
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if (runtime == NULL)
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2010-09-17 15:33:25 -06:00
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return;
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2010-08-11 17:35:30 -06:00
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if (line6pcm->pos_in_done + frames > runtime->buffer_size) {
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/*
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2010-08-22 17:08:25 -06:00
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The transferred area goes over buffer boundary,
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copy two separate chunks.
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*/
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2010-08-11 17:35:30 -06:00
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int len;
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len = runtime->buffer_size - line6pcm->pos_in_done;
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if (len > 0) {
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memcpy(runtime->dma_area +
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line6pcm->pos_in_done * bytes_per_frame, fbuf,
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len * bytes_per_frame);
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memcpy(runtime->dma_area, fbuf + len * bytes_per_frame,
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(frames - len) * bytes_per_frame);
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2010-09-21 17:58:00 -06:00
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} else {
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/* this is somewhat paranoid */
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dev_err(line6pcm->line6->ifcdev,
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"driver bug: len = %d\n", len);
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}
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2010-08-11 17:35:30 -06:00
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} else {
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/* copy single chunk */
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memcpy(runtime->dma_area +
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line6pcm->pos_in_done * bytes_per_frame, fbuf, fsize);
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}
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2010-09-21 17:58:00 -06:00
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line6pcm->pos_in_done += frames;
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if (line6pcm->pos_in_done >= runtime->buffer_size)
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2010-08-11 17:35:30 -06:00
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line6pcm->pos_in_done -= runtime->buffer_size;
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}
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void line6_capture_check_period(struct snd_line6_pcm *line6pcm, int length)
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{
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struct snd_pcm_substream *substream =
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get_substream(line6pcm, SNDRV_PCM_STREAM_CAPTURE);
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2010-09-21 17:58:00 -06:00
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line6pcm->bytes_in += length;
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if (line6pcm->bytes_in >= line6pcm->period_in) {
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2010-08-11 17:35:30 -06:00
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line6pcm->bytes_in %= line6pcm->period_in;
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snd_pcm_period_elapsed(substream);
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}
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}
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2011-12-09 18:12:32 -07:00
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void line6_free_capture_buffer(struct snd_line6_pcm *line6pcm)
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{
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kfree(line6pcm->buffer_in);
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line6pcm->buffer_in = NULL;
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}
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2010-08-11 17:35:30 -06:00
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/*
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2010-09-21 17:58:00 -06:00
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* Callback for completed capture URB.
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*/
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2009-02-27 21:28:04 -07:00
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static void audio_in_callback(struct urb *urb)
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2009-02-27 20:43:04 -07:00
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{
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int i, index, length = 0, shutdown = 0;
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unsigned long flags;
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2010-08-11 17:35:30 -06:00
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struct snd_line6_pcm *line6pcm = (struct snd_line6_pcm *)urb->context;
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line6pcm->last_frame_in = urb->start_frame;
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2009-02-27 20:43:04 -07:00
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/* find index of URB */
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2009-02-27 23:39:22 -07:00
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for (index = 0; index < LINE6_ISO_BUFFERS; ++index)
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if (urb == line6pcm->urb_audio_in[index])
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2009-02-27 20:43:04 -07:00
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break;
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2010-08-11 17:35:30 -06:00
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#ifdef CONFIG_LINE6_USB_DUMP_PCM
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2009-02-27 23:39:22 -07:00
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for (i = 0; i < LINE6_ISO_PACKETS; ++i) {
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2009-11-15 21:17:52 -07:00
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struct usb_iso_packet_descriptor *fout =
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&urb->iso_frame_desc[i];
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line6_write_hexdump(line6pcm->line6, 'C',
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urb->transfer_buffer + fout->offset,
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fout->length);
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2009-02-27 20:43:04 -07:00
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}
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#endif
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spin_lock_irqsave(&line6pcm->lock_audio_in, flags);
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2009-02-27 23:39:22 -07:00
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for (i = 0; i < LINE6_ISO_PACKETS; ++i) {
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2009-02-27 20:43:04 -07:00
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char *fbuf;
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int fsize;
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struct usb_iso_packet_descriptor *fin = &urb->iso_frame_desc[i];
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2010-08-22 17:08:25 -06:00
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if (fin->status == -EXDEV) {
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2009-02-27 20:43:04 -07:00
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shutdown = 1;
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break;
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}
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fbuf = urb->transfer_buffer + fin->offset;
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fsize = fin->actual_length;
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2010-08-11 17:35:30 -06:00
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if (fsize > line6pcm->max_packet_size) {
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dev_err(line6pcm->line6->ifcdev,
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"driver and/or device bug: packet too large (%d > %d)\n",
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fsize, line6pcm->max_packet_size);
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}
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2009-02-27 20:43:04 -07:00
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length += fsize;
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2010-08-11 17:35:30 -06:00
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/* the following assumes LINE6_ISO_PACKETS == 1: */
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line6pcm->prev_fbuf = fbuf;
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line6pcm->prev_fsize = fsize;
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2009-02-27 20:43:04 -07:00
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2010-08-11 17:35:30 -06:00
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#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
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2012-01-19 16:09:09 -07:00
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if (!(line6pcm->flags & LINE6_BITS_PCM_IMPULSE))
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2010-08-11 17:35:30 -06:00
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#endif
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2012-11-11 05:24:39 -07:00
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if (test_bit(LINE6_INDEX_PCM_ALSA_CAPTURE_STREAM,
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&line6pcm->flags) && (fsize > 0))
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2010-08-11 17:35:30 -06:00
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line6_capture_copy(line6pcm, fbuf, fsize);
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2009-02-27 20:43:04 -07:00
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}
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clear_bit(index, &line6pcm->active_urb_in);
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2010-08-11 17:35:30 -06:00
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if (test_and_clear_bit(index, &line6pcm->unlink_urb_in))
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2009-02-27 20:43:04 -07:00
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shutdown = 1;
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spin_unlock_irqrestore(&line6pcm->lock_audio_in, flags);
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2009-02-27 23:39:22 -07:00
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if (!shutdown) {
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2010-08-11 17:35:30 -06:00
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submit_audio_in_urb(line6pcm);
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2009-02-27 20:43:04 -07:00
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2010-08-22 17:08:25 -06:00
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#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
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2012-01-19 16:09:09 -07:00
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if (!(line6pcm->flags & LINE6_BITS_PCM_IMPULSE))
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2010-08-22 17:08:25 -06:00
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#endif
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2012-11-11 05:24:39 -07:00
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if (test_bit(LINE6_INDEX_PCM_ALSA_CAPTURE_STREAM,
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&line6pcm->flags))
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2010-08-22 17:08:25 -06:00
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line6_capture_check_period(line6pcm, length);
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2009-02-27 20:43:04 -07:00
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}
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}
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/* open capture callback */
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static int snd_line6_capture_open(struct snd_pcm_substream *substream)
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{
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int err;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
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2009-02-27 23:39:22 -07:00
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err = snd_pcm_hw_constraint_ratdens(runtime, 0,
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SNDRV_PCM_HW_PARAM_RATE,
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2010-08-22 17:08:25 -06:00
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(&line6pcm->
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properties->snd_line6_rates));
|
2009-02-27 23:39:22 -07:00
|
|
|
if (err < 0)
|
2009-02-27 20:43:04 -07:00
|
|
|
return err;
|
|
|
|
|
|
|
|
runtime->hw = line6pcm->properties->snd_line6_capture_hw;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* close capture callback */
|
|
|
|
static int snd_line6_capture_close(struct snd_pcm_substream *substream)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* hw_params capture callback */
|
2009-02-27 23:39:22 -07:00
|
|
|
static int snd_line6_capture_hw_params(struct snd_pcm_substream *substream,
|
|
|
|
struct snd_pcm_hw_params *hw_params)
|
2009-02-27 20:43:04 -07:00
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
|
|
|
|
|
|
|
|
/* -- Florian Demski [FD] */
|
|
|
|
/* don't ask me why, but this fixes the bug on my machine */
|
2009-02-27 23:39:22 -07:00
|
|
|
if (line6pcm == NULL) {
|
|
|
|
if (substream->pcm == NULL)
|
2009-02-27 20:43:04 -07:00
|
|
|
return -ENOMEM;
|
2009-02-27 23:39:22 -07:00
|
|
|
if (substream->pcm->private_data == NULL)
|
2009-02-27 20:43:04 -07:00
|
|
|
return -ENOMEM;
|
|
|
|
substream->private_data = substream->pcm->private_data;
|
2009-02-27 23:39:22 -07:00
|
|
|
line6pcm = snd_pcm_substream_chip(substream);
|
2009-02-27 20:43:04 -07:00
|
|
|
}
|
|
|
|
/* -- [FD] end */
|
|
|
|
|
2012-01-19 16:09:09 -07:00
|
|
|
ret = line6_pcm_acquire(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER);
|
2011-11-23 01:20:45 -07:00
|
|
|
|
2012-01-19 16:09:09 -07:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
2011-11-23 01:20:45 -07:00
|
|
|
|
2009-02-27 23:39:22 -07:00
|
|
|
ret = snd_pcm_lib_malloc_pages(substream,
|
|
|
|
params_buffer_bytes(hw_params));
|
2012-01-19 16:09:09 -07:00
|
|
|
if (ret < 0) {
|
|
|
|
line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER);
|
2009-02-27 20:43:04 -07:00
|
|
|
return ret;
|
2012-01-19 16:09:09 -07:00
|
|
|
}
|
2009-02-27 20:43:04 -07:00
|
|
|
|
|
|
|
line6pcm->period_in = params_period_bytes(hw_params);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* hw_free capture callback */
|
|
|
|
static int snd_line6_capture_hw_free(struct snd_pcm_substream *substream)
|
|
|
|
{
|
2011-11-23 01:20:45 -07:00
|
|
|
struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
|
2012-01-19 16:09:09 -07:00
|
|
|
line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER);
|
2009-02-27 20:43:04 -07:00
|
|
|
return snd_pcm_lib_free_pages(substream);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* trigger callback */
|
2010-08-11 17:35:30 -06:00
|
|
|
int snd_line6_capture_trigger(struct snd_line6_pcm *line6pcm, int cmd)
|
2009-02-27 20:43:04 -07:00
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
2009-02-27 23:39:22 -07:00
|
|
|
switch (cmd) {
|
2009-02-27 20:43:04 -07:00
|
|
|
case SNDRV_PCM_TRIGGER_START:
|
2010-08-11 17:35:30 -06:00
|
|
|
#ifdef CONFIG_PM
|
|
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
|
|
#endif
|
2012-11-11 05:24:39 -07:00
|
|
|
err = line6_pcm_acquire(line6pcm,
|
|
|
|
LINE6_BIT_PCM_ALSA_CAPTURE_STREAM);
|
2009-02-27 20:43:04 -07:00
|
|
|
|
2010-08-11 17:35:30 -06:00
|
|
|
if (err < 0)
|
|
|
|
return err;
|
2009-02-27 20:43:04 -07:00
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
2010-08-11 17:35:30 -06:00
|
|
|
#ifdef CONFIG_PM
|
|
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
|
|
#endif
|
2012-11-11 05:24:39 -07:00
|
|
|
err = line6_pcm_release(line6pcm,
|
|
|
|
LINE6_BIT_PCM_ALSA_CAPTURE_STREAM);
|
2010-08-11 17:35:30 -06:00
|
|
|
|
|
|
|
if (err < 0)
|
|
|
|
return err;
|
2009-02-27 20:43:04 -07:00
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* capture pointer callback */
|
|
|
|
static snd_pcm_uframes_t
|
|
|
|
snd_line6_capture_pointer(struct snd_pcm_substream *substream)
|
|
|
|
{
|
|
|
|
struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
|
|
|
|
return line6pcm->pos_in_done;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* capture operators */
|
|
|
|
struct snd_pcm_ops snd_line6_capture_ops = {
|
2010-08-22 17:08:25 -06:00
|
|
|
.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,
|
2009-02-27 20:43:04 -07:00
|
|
|
};
|
|
|
|
|
2010-08-11 17:35:30 -06:00
|
|
|
int line6_create_audio_in_urbs(struct snd_line6_pcm *line6pcm)
|
2009-02-27 20:43:04 -07:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
/* create audio URBs and fill in constant values: */
|
2009-02-27 23:39:22 -07:00
|
|
|
for (i = 0; i < LINE6_ISO_BUFFERS; ++i) {
|
2009-02-27 20:43:04 -07:00
|
|
|
struct urb *urb;
|
|
|
|
|
|
|
|
/* URB for audio in: */
|
2009-11-15 21:17:52 -07:00
|
|
|
urb = line6pcm->urb_audio_in[i] =
|
|
|
|
usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL);
|
2009-02-27 20:43:04 -07:00
|
|
|
|
2009-02-27 23:39:22 -07:00
|
|
|
if (urb == NULL) {
|
2009-02-27 20:43:04 -07:00
|
|
|
dev_err(line6pcm->line6->ifcdev, "Out of memory\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
urb->dev = line6pcm->line6->usbdev;
|
2009-11-15 21:17:52 -07:00
|
|
|
urb->pipe =
|
|
|
|
usb_rcvisocpipe(line6pcm->line6->usbdev,
|
2010-08-22 17:08:25 -06:00
|
|
|
line6pcm->ep_audio_read &
|
|
|
|
USB_ENDPOINT_NUMBER_MASK);
|
2009-02-27 20:43:04 -07:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|