/drivers/staging/line6/pcm.c
https://bitbucket.org/wisechild/galaxy-nexus · C · 522 lines · 372 code · 86 blank · 64 comment · 45 complexity · a05c75cca623ba5cf5d962c5d13be9c2 MD5 · raw file
- /*
- * Line6 Linux USB driver - 0.9.1beta
- *
- * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2.
- *
- */
- #include <linux/slab.h>
- #include <sound/core.h>
- #include <sound/control.h>
- #include <sound/pcm.h>
- #include <sound/pcm_params.h>
- #include "audio.h"
- #include "capture.h"
- #include "driver.h"
- #include "playback.h"
- #include "pod.h"
- #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
- static struct snd_line6_pcm *dev2pcm(struct device *dev)
- {
- struct usb_interface *interface = to_usb_interface(dev);
- struct usb_line6 *line6 = usb_get_intfdata(interface);
- struct snd_line6_pcm *line6pcm = line6->line6pcm;
- return line6pcm;
- }
- /*
- "read" request on "impulse_volume" special file.
- */
- static ssize_t pcm_get_impulse_volume(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- return sprintf(buf, "%d\n", dev2pcm(dev)->impulse_volume);
- }
- /*
- "write" request on "impulse_volume" special file.
- */
- static ssize_t pcm_set_impulse_volume(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
- {
- struct snd_line6_pcm *line6pcm = dev2pcm(dev);
- int value = simple_strtoul(buf, NULL, 10);
- line6pcm->impulse_volume = value;
- if (value > 0)
- line6_pcm_start(line6pcm, MASK_PCM_IMPULSE);
- else
- line6_pcm_stop(line6pcm, MASK_PCM_IMPULSE);
- return count;
- }
- /*
- "read" request on "impulse_period" special file.
- */
- static ssize_t pcm_get_impulse_period(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- return sprintf(buf, "%d\n", dev2pcm(dev)->impulse_period);
- }
- /*
- "write" request on "impulse_period" special file.
- */
- static ssize_t pcm_set_impulse_period(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
- {
- dev2pcm(dev)->impulse_period = simple_strtoul(buf, NULL, 10);
- return count;
- }
- static DEVICE_ATTR(impulse_volume, S_IWUSR | S_IRUGO, pcm_get_impulse_volume,
- pcm_set_impulse_volume);
- static DEVICE_ATTR(impulse_period, S_IWUSR | S_IRUGO, pcm_get_impulse_period,
- pcm_set_impulse_period);
- #endif
- int line6_pcm_start(struct snd_line6_pcm *line6pcm, int channels)
- {
- unsigned long flags_old =
- __sync_fetch_and_or(&line6pcm->flags, channels);
- unsigned long flags_new = flags_old | channels;
- int err = 0;
- #if LINE6_BACKUP_MONITOR_SIGNAL
- if (!(line6pcm->line6->properties->capabilities & LINE6_BIT_HWMON)) {
- line6pcm->prev_fbuf =
- kmalloc(LINE6_ISO_PACKETS * line6pcm->max_packet_size,
- GFP_KERNEL);
- if (!line6pcm->prev_fbuf) {
- dev_err(line6pcm->line6->ifcdev,
- "cannot malloc monitor buffer\n");
- return -ENOMEM;
- }
- }
- #else
- line6pcm->prev_fbuf = NULL;
- #endif
- if (((flags_old & MASK_CAPTURE) == 0) &&
- ((flags_new & MASK_CAPTURE) != 0)) {
- /*
- Waiting for completion of active URBs in the stop handler is
- a bug, we therefore report an error if capturing is restarted
- too soon.
- */
- if (line6pcm->active_urb_in | line6pcm->unlink_urb_in)
- return -EBUSY;
- line6pcm->buffer_in =
- kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
- line6pcm->max_packet_size, GFP_KERNEL);
- if (!line6pcm->buffer_in) {
- dev_err(line6pcm->line6->ifcdev,
- "cannot malloc capture buffer\n");
- return -ENOMEM;
- }
- line6pcm->count_in = 0;
- line6pcm->prev_fsize = 0;
- err = line6_submit_audio_in_all_urbs(line6pcm);
- if (err < 0) {
- __sync_fetch_and_and(&line6pcm->flags, ~channels);
- return err;
- }
- }
- if (((flags_old & MASK_PLAYBACK) == 0) &&
- ((flags_new & MASK_PLAYBACK) != 0)) {
- /*
- See comment above regarding PCM restart.
- */
- if (line6pcm->active_urb_out | line6pcm->unlink_urb_out)
- return -EBUSY;
- line6pcm->buffer_out =
- kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
- line6pcm->max_packet_size, GFP_KERNEL);
- if (!line6pcm->buffer_out) {
- dev_err(line6pcm->line6->ifcdev,
- "cannot malloc playback buffer\n");
- return -ENOMEM;
- }
- line6pcm->count_out = 0;
- err = line6_submit_audio_out_all_urbs(line6pcm);
- if (err < 0) {
- __sync_fetch_and_and(&line6pcm->flags, ~channels);
- return err;
- }
- }
- return 0;
- }
- int line6_pcm_stop(struct snd_line6_pcm *line6pcm, int channels)
- {
- unsigned long flags_old =
- __sync_fetch_and_and(&line6pcm->flags, ~channels);
- unsigned long flags_new = flags_old & ~channels;
- if (((flags_old & MASK_CAPTURE) != 0) &&
- ((flags_new & MASK_CAPTURE) == 0)) {
- line6_unlink_audio_in_urbs(line6pcm);
- kfree(line6pcm->buffer_in);
- line6pcm->buffer_in = NULL;
- }
- if (((flags_old & MASK_PLAYBACK) != 0) &&
- ((flags_new & MASK_PLAYBACK) == 0)) {
- line6_unlink_audio_out_urbs(line6pcm);
- kfree(line6pcm->buffer_out);
- line6pcm->buffer_out = NULL;
- }
- #if LINE6_BACKUP_MONITOR_SIGNAL
- kfree(line6pcm->prev_fbuf);
- #endif
- return 0;
- }
- /* trigger callback */
- int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
- {
- struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
- struct snd_pcm_substream *s;
- int err;
- unsigned long flags;
- spin_lock_irqsave(&line6pcm->lock_trigger, flags);
- clear_bit(BIT_PREPARED, &line6pcm->flags);
- snd_pcm_group_for_each_entry(s, substream) {
- switch (s->stream) {
- case SNDRV_PCM_STREAM_PLAYBACK:
- err = snd_line6_playback_trigger(line6pcm, cmd);
- if (err < 0) {
- spin_unlock_irqrestore(&line6pcm->lock_trigger,
- flags);
- return err;
- }
- break;
- case SNDRV_PCM_STREAM_CAPTURE:
- err = snd_line6_capture_trigger(line6pcm, cmd);
- if (err < 0) {
- spin_unlock_irqrestore(&line6pcm->lock_trigger,
- flags);
- return err;
- }
- break;
- default:
- dev_err(line6pcm->line6->ifcdev,
- "Unknown stream direction %d\n", s->stream);
- }
- }
- spin_unlock_irqrestore(&line6pcm->lock_trigger, flags);
- return 0;
- }
- /* control info callback */
- static int snd_line6_control_playback_info(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_info *uinfo)
- {
- uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
- uinfo->count = 2;
- uinfo->value.integer.min = 0;
- uinfo->value.integer.max = 256;
- return 0;
- }
- /* control get callback */
- static int snd_line6_control_playback_get(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
- {
- int i;
- struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
- for (i = 2; i--;)
- ucontrol->value.integer.value[i] = line6pcm->volume_playback[i];
- return 0;
- }
- /* control put callback */
- static int snd_line6_control_playback_put(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
- {
- int i, changed = 0;
- struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
- for (i = 2; i--;)
- if (line6pcm->volume_playback[i] !=
- ucontrol->value.integer.value[i]) {
- line6pcm->volume_playback[i] =
- ucontrol->value.integer.value[i];
- changed = 1;
- }
- return changed;
- }
- /* control definition */
- static struct snd_kcontrol_new line6_control_playback = {
- .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
- .name = "PCM Playback Volume",
- .index = 0,
- .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
- .info = snd_line6_control_playback_info,
- .get = snd_line6_control_playback_get,
- .put = snd_line6_control_playback_put
- };
- /*
- Cleanup the PCM device.
- */
- static void line6_cleanup_pcm(struct snd_pcm *pcm)
- {
- int i;
- struct snd_line6_pcm *line6pcm = snd_pcm_chip(pcm);
- #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
- device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_volume);
- device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_period);
- #endif
- for (i = LINE6_ISO_BUFFERS; i--;) {
- if (line6pcm->urb_audio_out[i]) {
- usb_kill_urb(line6pcm->urb_audio_out[i]);
- usb_free_urb(line6pcm->urb_audio_out[i]);
- }
- if (line6pcm->urb_audio_in[i]) {
- usb_kill_urb(line6pcm->urb_audio_in[i]);
- usb_free_urb(line6pcm->urb_audio_in[i]);
- }
- }
- }
- /* create a PCM device */
- static int snd_line6_new_pcm(struct snd_line6_pcm *line6pcm)
- {
- struct snd_pcm *pcm;
- int err;
- err = snd_pcm_new(line6pcm->line6->card,
- (char *)line6pcm->line6->properties->name,
- 0, 1, 1, &pcm);
- if (err < 0)
- return err;
- pcm->private_data = line6pcm;
- pcm->private_free = line6_cleanup_pcm;
- line6pcm->pcm = pcm;
- strcpy(pcm->name, line6pcm->line6->properties->name);
- /* set operators */
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
- &snd_line6_playback_ops);
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_line6_capture_ops);
- /* pre-allocation of buffers */
- snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
- snd_dma_continuous_data
- (GFP_KERNEL), 64 * 1024,
- 128 * 1024);
- return 0;
- }
- /* PCM device destructor */
- static int snd_line6_pcm_free(struct snd_device *device)
- {
- return 0;
- }
- /*
- Stop substream if still running.
- */
- static void pcm_disconnect_substream(struct snd_pcm_substream *substream)
- {
- if (substream->runtime && snd_pcm_running(substream))
- snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
- }
- /*
- Stop PCM stream.
- */
- void line6_pcm_disconnect(struct snd_line6_pcm *line6pcm)
- {
- pcm_disconnect_substream(get_substream
- (line6pcm, SNDRV_PCM_STREAM_CAPTURE));
- pcm_disconnect_substream(get_substream
- (line6pcm, SNDRV_PCM_STREAM_PLAYBACK));
- line6_unlink_wait_clear_audio_out_urbs(line6pcm);
- line6_unlink_wait_clear_audio_in_urbs(line6pcm);
- }
- /*
- Create and register the PCM device and mixer entries.
- Create URBs for playback and capture.
- */
- int line6_init_pcm(struct usb_line6 *line6,
- struct line6_pcm_properties *properties)
- {
- static struct snd_device_ops pcm_ops = {
- .dev_free = snd_line6_pcm_free,
- };
- int err;
- int ep_read = 0, ep_write = 0;
- struct snd_line6_pcm *line6pcm;
- if (!(line6->properties->capabilities & LINE6_BIT_PCM))
- return 0; /* skip PCM initialization and report success */
- /* initialize PCM subsystem based on product id: */
- switch (line6->product) {
- case LINE6_DEVID_BASSPODXT:
- case LINE6_DEVID_BASSPODXTLIVE:
- case LINE6_DEVID_BASSPODXTPRO:
- case LINE6_DEVID_PODXT:
- case LINE6_DEVID_PODXTLIVE:
- case LINE6_DEVID_PODXTPRO:
- ep_read = 0x82;
- ep_write = 0x01;
- break;
- case LINE6_DEVID_PODX3:
- case LINE6_DEVID_PODX3LIVE:
- ep_read = 0x86;
- ep_write = 0x02;
- break;
- case LINE6_DEVID_POCKETPOD:
- ep_read = 0x82;
- ep_write = 0x02;
- break;
- case LINE6_DEVID_GUITARPORT:
- case LINE6_DEVID_PODSTUDIO_GX:
- case LINE6_DEVID_PODSTUDIO_UX1:
- case LINE6_DEVID_PODSTUDIO_UX2:
- case LINE6_DEVID_TONEPORT_GX:
- case LINE6_DEVID_TONEPORT_UX1:
- case LINE6_DEVID_TONEPORT_UX2:
- ep_read = 0x82;
- ep_write = 0x01;
- break;
- /* this is for interface_number == 1:
- case LINE6_DEVID_TONEPORT_UX2:
- case LINE6_DEVID_PODSTUDIO_UX2:
- ep_read = 0x87;
- ep_write = 0x00;
- break;
- */
- default:
- MISSING_CASE;
- }
- line6pcm = kzalloc(sizeof(struct snd_line6_pcm), GFP_KERNEL);
- if (line6pcm == NULL)
- return -ENOMEM;
- line6pcm->volume_playback[0] = line6pcm->volume_playback[1] = 255;
- line6pcm->volume_monitor = 255;
- line6pcm->line6 = line6;
- line6pcm->ep_audio_read = ep_read;
- line6pcm->ep_audio_write = ep_write;
- line6pcm->max_packet_size = usb_maxpacket(line6->usbdev,
- usb_rcvintpipe(line6->usbdev,
- ep_read), 0);
- line6pcm->properties = properties;
- line6->line6pcm = line6pcm;
- /* PCM device: */
- err = snd_device_new(line6->card, SNDRV_DEV_PCM, line6, &pcm_ops);
- if (err < 0)
- return err;
- snd_card_set_dev(line6->card, line6->ifcdev);
- err = snd_line6_new_pcm(line6pcm);
- if (err < 0)
- return err;
- spin_lock_init(&line6pcm->lock_audio_out);
- spin_lock_init(&line6pcm->lock_audio_in);
- spin_lock_init(&line6pcm->lock_trigger);
- err = line6_create_audio_out_urbs(line6pcm);
- if (err < 0)
- return err;
- err = line6_create_audio_in_urbs(line6pcm);
- if (err < 0)
- return err;
- /* mixer: */
- err =
- snd_ctl_add(line6->card,
- snd_ctl_new1(&line6_control_playback, line6pcm));
- if (err < 0)
- return err;
- #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
- /* impulse response test: */
- err = device_create_file(line6->ifcdev, &dev_attr_impulse_volume);
- if (err < 0)
- return err;
- err = device_create_file(line6->ifcdev, &dev_attr_impulse_period);
- if (err < 0)
- return err;
- line6pcm->impulse_period = LINE6_IMPULSE_DEFAULT_PERIOD;
- #endif
- return 0;
- }
- /* prepare pcm callback */
- int snd_line6_prepare(struct snd_pcm_substream *substream)
- {
- struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
- if (!test_and_set_bit(BIT_PREPARED, &line6pcm->flags)) {
- line6pcm->count_out = 0;
- line6pcm->pos_out = 0;
- line6pcm->pos_out_done = 0;
- line6pcm->bytes_out = 0;
- line6pcm->count_in = 0;
- line6pcm->pos_in_done = 0;
- line6pcm->bytes_in = 0;
- }
- return 0;
- }