cregit-Linux how code gets into the kernel

Release 4.13 sound/usb/card.c

Directory: sound/usb
/*
 *   (Tentative) USB Audio Driver for ALSA
 *
 *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
 *
 *   Many codes borrowed from audio.c by
 *          Alan Cox (alan@lxorguk.ukuu.org.uk)
 *          Thomas Sailer (sailer@ife.ee.ethz.ch)
 *
 *
 *   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; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 *
 *  NOTES:
 *
 *   - the linked URBs would be preferred but not used so far because of
 *     the instability of unlinking.
 *   - type II is not supported properly.  there is no device which supports
 *     this type *correctly*.  SB extigy looks as if it supports, but it's
 *     indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
 */


#include <linux/bitops.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/usb.h>
#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
#include <linux/module.h>

#include <sound/control.h>
#include <sound/core.h>
#include <sound/info.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>

#include "usbaudio.h"
#include "card.h"
#include "midi.h"
#include "mixer.h"
#include "proc.h"
#include "quirks.h"
#include "endpoint.h"
#include "helper.h"
#include "debug.h"
#include "pcm.h"
#include "format.h"
#include "power.h"
#include "stream.h"

MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
MODULE_DESCRIPTION("USB Audio");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");



static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	
/* Index 0-MAX */

static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	
/* ID for this card */

static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
/* Enable this card */
/* Vendor/product IDs for this card */

static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };

static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };

static int device_setup[SNDRV_CARDS]; 
/* device parameter for this card */

static bool ignore_ctl_error;

static bool autoclock = true;

static char *quirk_alias[SNDRV_CARDS];

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
module_param_array(vid, int, NULL, 0444);
MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
module_param_array(pid, int, NULL, 0444);
MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
module_param_array(device_setup, int, NULL, 0444);
MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
module_param(ignore_ctl_error, bool, 0444);
MODULE_PARM_DESC(ignore_ctl_error,
		 "Ignore errors from USB controller for mixer interfaces.");
module_param(autoclock, bool, 0444);
MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes).");
module_param_array(quirk_alias, charp, NULL, 0444);
MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef.");

/*
 * we keep the snd_usb_audio_t instances by ourselves for merging
 * the all interfaces on the same card as one sound device.
 */

static DEFINE_MUTEX(register_mutex);

static struct snd_usb_audio *usb_chip[SNDRV_CARDS];

static struct usb_driver usb_audio_driver;

/*
 * disconnect streams
 * called from usb_audio_disconnect()
 */

static void snd_usb_stream_disconnect(struct snd_usb_stream *as) { int idx; struct snd_usb_substream *subs; for (idx = 0; idx < 2; idx++) { subs = &as->substream[idx]; if (!subs->num_formats) continue; subs->interface = -1; subs->data_endpoint = NULL; subs->sync_endpoint = NULL; } }

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Daniel Mack6895.77%250.00%
Takashi Iwai34.23%250.00%
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static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface) { struct usb_device *dev = chip->dev; struct usb_host_interface *alts; struct usb_interface_descriptor *altsd; struct usb_interface *iface = usb_ifnum_to_if(dev, interface); if (!iface) { dev_err(&dev->dev, "%u:%d : does not exist\n", ctrlif, interface); return -EINVAL; } alts = &iface->altsetting[0]; altsd = get_iface_desc(alts); /* * Android with both accessory and audio interfaces enabled gets the * interface numbers wrong. */ if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) || chip->usb_id == USB_ID(0x18d1, 0x2d05)) && interface == 0 && altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) { interface = 2; iface = usb_ifnum_to_if(dev, interface); if (!iface) return -EINVAL; alts = &iface->altsetting[0]; altsd = get_iface_desc(alts); } if (usb_interface_claimed(iface)) { dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n", ctrlif, interface); return -EINVAL; } if ((altsd->bInterfaceClass == USB_CLASS_AUDIO || altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) && altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) { int err = __snd_usbmidi_create(chip->card, iface, &chip->midi_list, NULL, chip->usb_id); if (err < 0) { dev_err(&dev->dev, "%u:%d: cannot create sequencer device\n", ctrlif, interface); return -EINVAL; } usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); return 0; } if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) { dev_dbg(&dev->dev, "%u:%d: skipping non-supported interface %d\n", ctrlif, interface, altsd->bInterfaceClass); /* skip non-supported classes */ return -EINVAL; } if (snd_usb_get_speed(dev) == USB_SPEED_LOW) { dev_err(&dev->dev, "low speed audio streaming not supported\n"); return -EINVAL; } if (! snd_usb_parse_audio_interface(chip, interface)) { usb_set_interface(dev, interface, 0); /* reset the current interface */ usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); } return 0; }

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Daniel Mack28370.05%240.00%
Clemens Ladisch9022.28%120.00%
Takashi Iwai317.67%240.00%
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/* * parse audio control descriptor and create pcm/midi streams */
static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) { struct usb_device *dev = chip->dev; struct usb_host_interface *host_iface; struct usb_interface_descriptor *altsd; void *control_header; int i, protocol; /* find audiocontrol interface */ host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0]; control_header = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, UAC_HEADER); altsd = get_iface_desc(host_iface); protocol = altsd->bInterfaceProtocol; if (!control_header) { dev_err(&dev->dev, "cannot find UAC_HEADER\n"); return -EINVAL; } switch (protocol) { default: dev_warn(&dev->dev, "unknown interface protocol %#02x, assuming v1\n", protocol); /* fall through */ case UAC_VERSION_1: { struct uac1_ac_header_descriptor *h1 = control_header; if (!h1->bInCollection) { dev_info(&dev->dev, "skipping empty audio interface (v1)\n"); return -EINVAL; } if (h1->bLength < sizeof(*h1) + h1->bInCollection) { dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n"); return -EINVAL; } for (i = 0; i < h1->bInCollection; i++) snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]); break; } case UAC_VERSION_2: { struct usb_interface_assoc_descriptor *assoc = usb_ifnum_to_if(dev, ctrlif)->intf_assoc; if (!assoc) { /* * Firmware writers cannot count to three. So to find * the IAD on the NuForce UDH-100, also check the next * interface. */ struct usb_interface *iface = usb_ifnum_to_if(dev, ctrlif + 1); if (iface && iface->intf_assoc && iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO && iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2) assoc = iface->intf_assoc; } if (!assoc) { dev_err(&dev->dev, "Audio class v2 interfaces need an interface association\n"); return -EINVAL; } for (i = 0; i < assoc->bInterfaceCount; i++) { int intf = assoc->bFirstInterface + i; if (intf != ctrlif) snd_usb_create_stream(chip, ctrlif, intf); } break; } } return 0; }

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Daniel Mack27375.21%240.00%
Clemens Ladisch6016.53%240.00%
Takashi Iwai308.26%120.00%
Total363100.00%5100.00%

/* * free the chip instance * * here we have to do not much, since pcm and controls are already freed * */
static int snd_usb_audio_free(struct snd_usb_audio *chip) { struct snd_usb_endpoint *ep, *n; list_for_each_entry_safe(ep, n, &chip->ep_list, list) snd_usb_endpoint_free(ep); mutex_destroy(&chip->mutex); if (!atomic_read(&chip->shutdown)) dev_set_drvdata(&chip->dev->dev, NULL); kfree(chip); return 0; }

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Takashi Iwai4663.01%466.67%
Daniel Mack2736.99%233.33%
Total73100.00%6100.00%


static int snd_usb_audio_dev_free(struct snd_device *device) { struct snd_usb_audio *chip = device->device_data; return snd_usb_audio_free(chip); }

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Daniel Mack26100.00%1100.00%
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/* * create a chip instance and set its names. */
static int snd_usb_audio_create(struct usb_interface *intf, struct usb_device *dev, int idx, const struct snd_usb_audio_quirk *quirk, unsigned int usb_id, struct snd_usb_audio **rchip) { struct snd_card *card; struct snd_usb_audio *chip; int err, len; char component[14]; static struct snd_device_ops ops = { .dev_free = snd_usb_audio_dev_free, }; *rchip = NULL; switch (snd_usb_get_speed(dev)) { case USB_SPEED_LOW: case USB_SPEED_FULL: case USB_SPEED_HIGH: case USB_SPEED_WIRELESS: case USB_SPEED_SUPER: case USB_SPEED_SUPER_PLUS: break; default: dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev)); return -ENXIO; } err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE, 0, &card); if (err < 0) { dev_err(&dev->dev, "cannot create card instance %d\n", idx); return err; } chip = kzalloc(sizeof(*chip), GFP_KERNEL); if (! chip) { snd_card_free(card); return -ENOMEM; } mutex_init(&chip->mutex); init_waitqueue_head(&chip->shutdown_wait); chip->index = idx; chip->dev = dev; chip->card = card; chip->setup = device_setup[idx]; chip->autoclock = autoclock; atomic_set(&chip->active, 1); /* avoid autopm during probing */ atomic_set(&chip->usage_count, 0); atomic_set(&chip->shutdown, 0); chip->usb_id = usb_id; INIT_LIST_HEAD(&chip->pcm_list); INIT_LIST_HEAD(&chip->ep_list); INIT_LIST_HEAD(&chip->midi_list); INIT_LIST_HEAD(&chip->mixer_list); if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { snd_usb_audio_free(chip); snd_card_free(card); return err; } strcpy(card->driver, "USB-Audio"); sprintf(component, "USB%04x:%04x", USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); snd_component_add(card, component); /* retrieve the device string as shortname */ if (quirk && quirk->product_name && *quirk->product_name) { strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname)); } else { if (!dev->descriptor.iProduct || usb_string(dev, dev->descriptor.iProduct, card->shortname, sizeof(card->shortname)) <= 0) { /* no name available from anywhere, so use ID */ sprintf(card->shortname, "USB Device %#04x:%#04x", USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); } } strim(card->shortname); /* retrieve the vendor and device strings as longname */ if (quirk && quirk->vendor_name && *quirk->vendor_name) { len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname)); } else { if (dev->descriptor.iManufacturer) len = usb_string(dev, dev->descriptor.iManufacturer, card->longname, sizeof(card->longname)); else len = 0; /* we don't really care if there isn't any vendor string */ } if (len > 0) { strim(card->longname); if (*card->longname) strlcat(card->longname, " ", sizeof(card->longname)); } strlcat(card->longname, card->shortname, sizeof(card->longname)); len = strlcat(card->longname, " at ", sizeof(card->longname)); if (len < sizeof(card->longname)) usb_make_path(dev, card->longname + len, sizeof(card->longname) - len); switch (snd_usb_get_speed(dev)) { case USB_SPEED_LOW: strlcat(card->longname, ", low speed", sizeof(card->longname)); break; case USB_SPEED_FULL: strlcat(card->longname, ", full speed", sizeof(card->longname)); break; case USB_SPEED_HIGH: strlcat(card->longname, ", high speed", sizeof(card->longname)); break; case USB_SPEED_SUPER: strlcat(card->longname, ", super speed", sizeof(card->longname)); break; case USB_SPEED_SUPER_PLUS: strlcat(card->longname, ", super speed plus", sizeof(card->longname)); break; default: break; } snd_usb_audio_create_proc(chip); *rchip = chip; return 0; }

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Daniel Mack58272.84%318.75%
Takashi Iwai9712.14%850.00%
Paul Zimmerman8410.51%16.25%
Oliver Neukum273.38%212.50%
Eldad Zack60.75%16.25%
Thomas Pugliese30.38%16.25%
Total799100.00%16100.00%

/* look for a matching quirk alias id */
static bool get_alias_id(struct usb_device *dev, unsigned int *id) { int i; unsigned int src, dst; for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) { if (!quirk_alias[i] || sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 || src != *id) continue; dev_info(&dev->dev, "device (%04x:%04x): applying quirk alias %04x:%04x\n", USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id), USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst)); *id = dst; return true; } return false; }

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Takashi Iwai118100.00%1100.00%
Total118100.00%1100.00%

static struct usb_device_id usb_audio_ids[]; /* defined below */ /* look for the corresponding quirk */
static const struct snd_usb_audio_quirk * get_alias_quirk(struct usb_device *dev, unsigned int id) { const struct usb_device_id *p; for (p = usb_audio_ids; p->match_flags; p++) { /* FIXME: this checks only vendor:product pair in the list */ if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) == USB_DEVICE_ID_MATCH_DEVICE && p->idVendor == USB_ID_VENDOR(id) && p->idProduct == USB_ID_PRODUCT(id)) return (const struct snd_usb_audio_quirk *)p->driver_info; } return NULL; }

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Takashi Iwai84100.00%1100.00%
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/* * probe the active usb device * * note that this can be called multiple times per a device, when it * includes multiple audio control interfaces. * * thus we check the usb device pointer and creates the card instance * only at the first time. the successive calls of this function will * append the pcm interface to the corresponding card. */
static int usb_audio_probe(struct usb_interface *intf, const struct usb_device_id *usb_id) { struct usb_device *dev = interface_to_usbdev(intf); const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info; struct snd_usb_audio *chip; int i, err; struct usb_host_interface *alts; int ifnum; u32 id; alts = &intf->altsetting[0]; ifnum = get_iface_desc(alts)->bInterfaceNumber; id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), le16_to_cpu(dev->descriptor.idProduct)); if (get_alias_id(dev, &id)) quirk = get_alias_quirk(dev, id); if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) return -ENXIO; err = snd_usb_apply_boot_quirk(dev, intf, quirk, id); if (err < 0) return err; /* * found a config. now register to ALSA */ /* check whether it's already registered */ chip = NULL; mutex_lock(&register_mutex); for (i = 0; i < SNDRV_CARDS; i++) { if (usb_chip[i] && usb_chip[i]->dev == dev) { if (atomic_read(&usb_chip[i]->shutdown)) { dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n"); err = -EIO; goto __error; } chip = usb_chip[i]; atomic_inc(&chip->active); /* avoid autopm */ break; } } if (! chip) { /* it's a fresh one. * now look for an empty slot and create a new card instance */ for (i = 0; i < SNDRV_CARDS; i++) if (enable[i] && ! usb_chip[i] && (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { err = snd_usb_audio_create(intf, dev, i, quirk, id, &chip); if (err < 0) goto __error; chip->pm_intf = intf; break; } if (!chip) { dev_err(&dev->dev, "no available usb audio device\n"); err = -ENODEV; goto __error; } } dev_set_drvdata(&dev->dev, chip); /* * For devices with more than one control interface, we assume the * first contains the audio controls. We might need a more specific * check here in the future. */ if (!chip->ctrl_intf) chip->ctrl_intf = alts; chip->txfr_quirk = 0; err = 1; /* continue */ if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { /* need some special handlings */ err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk); if (err < 0) goto __error; } if (err > 0) { /* create normal USB audio interfaces */ err = snd_usb_create_streams(chip, ifnum); if (err < 0) goto __error; err = snd_usb_create_mixer(chip, ifnum, ignore_ctl_error); if (err < 0) goto __error; } /* we are allowed to call snd_card_register() many times */ err = snd_card_register(chip->card); if (err < 0) goto __error; usb_chip[chip->index] = chip; chip->num_interfaces++; usb_set_intfdata(intf, chip); atomic_dec(&chip->active); mutex_unlock(&register_mutex); return 0; __error: if (chip) { if (!chip->num_interfaces) snd_card_free(chip->card); atomic_dec(&chip->active); } mutex_unlock(&register_mutex); return err; }

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Daniel Mack44372.50%214.29%
Takashi Iwai14123.08%857.14%
Kazuki Oikawa101.64%17.14%
Oliver Neukum91.47%17.14%
Thomas Pfaff81.31%214.29%
Total611100.00%14100.00%

/* * we need to take care of counter, since disconnection can be called also * many times as well as usb_audio_probe(). */
static void usb_audio_disconnect(struct usb_interface *intf) { struct snd_usb_audio *chip = usb_get_intfdata(intf); struct snd_card *card; struct list_head *p; if (chip == (void *)-1L) return; card = chip->card; mutex_lock(&register_mutex); if (atomic_inc_return(&chip->shutdown) == 1) { struct snd_usb_stream *as; struct snd_usb_endpoint *ep; struct usb_mixer_interface *mixer; /* wait until all pending tasks done; * they are protected by snd_usb_lock_shutdown() */ wait_event(chip->shutdown_wait, !atomic_read(&chip->usage_count)); snd_card_disconnect(card); /* release the pcm resources */ list_for_each_entry(as, &chip->pcm_list, list) { snd_usb_stream_disconnect(as); } /* release the endpoint resources */ list_for_each_entry(ep, &chip->ep_list, list) { snd_usb_endpoint_release(ep); } /* release the midi resources */ list_for_each(p, &chip->midi_list) { snd_usbmidi_disconnect(p); } /* release mixer resources */ list_for_each_entry(mixer, &chip->mixer_list, list) { snd_usb_mixer_disconnect(mixer); } } chip->num_interfaces--; if (chip->num_interfaces <= 0) { usb_chip[chip->index] = NULL; mutex_unlock(&register_mutex); snd_card_free_when_closed(card); } else { mutex_unlock(&register_mutex); } }

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Daniel Mack11353.30%218.18%
Takashi Iwai9745.75%763.64%
Pavel Roskin20.94%218.18%
Total212100.00%11100.00%

/* lock the shutdown (disconnect) task and autoresume */
int snd_usb_lock_shutdown(struct snd_usb_audio *chip) { int err; atomic_inc(&chip->usage_count); if (atomic_read(&chip->shutdown)) { err = -EIO; goto error; } err = snd_usb_autoresume(chip); if (err < 0) goto error; return 0; error: if (atomic_dec_and_test(&chip->usage_count)) wake_up(&chip->shutdown_wait); return err; }

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Takashi Iwai5971.08%375.00%
Oliver Neukum2428.92%125.00%
Total83100.00%4100.00%

/* autosuspend and unlock the shutdown */
void snd_usb_unlock_shutdown(struct snd_usb_audio *chip) { snd_usb_autosuspend(chip); if (atomic_dec_and_test(&chip->usage_count)) wake_up(&chip->shutdown_wait); }

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Takashi Iwai2575.76%266.67%
Oliver Neukum824.24%133.33%
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#ifdef CONFIG_PM
int snd_usb_autoresume(struct snd_usb_audio *chip) { if (atomic_read(&chip->shutdown)) return -EIO; if (atomic_inc_return(&chip->active) == 1) return usb_autopm_get_interface(chip->pm_intf); return 0; }

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Takashi Iwai3676.60%266.67%
Oliver Neukum1123.40%133.33%
Total47100.00%3100.00%


void snd_usb_autosuspend(struct snd_usb_audio *chip) { if (atomic_read(&chip->shutdown)) return; if (atomic_dec_and_test(&chip->active)) usb_autopm_put_interface(chip->pm_intf); }

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Takashi Iwai3797.37%375.00%
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static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) { struct snd_usb_audio *chip = usb_get_intfdata(intf); struct snd_usb_stream *as; struct usb_mixer_interface *mixer; struct list_head *p; if (chip == (void *)-1L) return 0; chip->autosuspended = !!PMSG_IS_AUTO(message); if (!chip->autosuspended) snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); if (!chip->num_suspended_intf++) { list_for_each_entry(as, &chip->pcm_list, list) { snd_pcm_suspend_all(as->pcm); as->substream[0].need_setup_ep = as->substream[1].need_setup_ep = true; } list_for_each(p, &chip->midi_list) snd_usbmidi_suspend(p); list_for_each_entry(mixer, &chip->mixer_list, list) snd_usb_mixer_suspend(mixer); } return 0; }

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Daniel Mack7750.00%111.11%
Takashi Iwai3422.08%333.33%
Oliver Neukum2012.99%222.22%
Adam Goode1610.39%111.11%
Eldad Zack42.60%111.11%
Alan Stern31.95%111.11%
Total154100.00%9100.00%


static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume) { struct snd_usb_audio *chip = usb_get_intfdata(intf); struct usb_mixer_interface *mixer; struct list_head *p; int err = 0; if (chip == (void *)-1L) return 0; if (--chip->num_suspended_intf) return 0; atomic_inc(&chip->active); /* avoid autopm */ /* * ALSA leaves material resumption to user space * we just notify and restart the mixers */ list_for_each_entry(mixer, &chip->mixer_list, list) { err = snd_usb_mixer_resume(mixer, reset_resume); if (err < 0) goto err_out; } list_for_each(p, &chip->midi_list) { snd_usbmidi_resume(p); } if (!chip->autosuspended) snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); chip->autosuspended = 0; err_out: atomic_dec(&chip->active); /* allow autopm after this point */ return err; }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Mack5536.67%114.29%
Oliver Neukum5234.67%228.57%
Takashi Iwai2516.67%342.86%
Adam Goode1812.00%114.29%
Total150100.00%7100.00%


static int usb_audio_resume(struct usb_interface *intf) { return __usb_audio_resume(intf, false); }

Contributors

PersonTokensPropCommitsCommitProp
Takashi Iwai19100.00%1100.00%
Total19100.00%1100.00%


static int usb_audio_reset_resume(struct usb_interface *intf) { return __usb_audio_resume(intf, true); }

Contributors

PersonTokensPropCommitsCommitProp
Takashi Iwai19100.00%1100.00%
Total19100.00%1100.00%

#else #define usb_audio_suspend NULL #define usb_audio_resume NULL #define usb_audio_reset_resume NULL #endif /* CONFIG_PM */ static struct usb_device_id usb_audio_ids [] = { #include "quirks-table.h" { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, { } /* Terminating entry */ }; MODULE_DEVICE_TABLE(usb, usb_audio_ids); /* * entry point for linux usb interface */ static struct usb_driver usb_audio_driver = { .name = "snd-usb-audio", .probe = usb_audio_probe, .disconnect = usb_audio_disconnect, .suspend = usb_audio_suspend, .resume = usb_audio_resume, .reset_resume = usb_audio_reset_resume, .id_table = usb_audio_ids, .supports_autosuspend = 1, }; module_usb_driver(usb_audio_driver);

Overall Contributors

PersonTokensPropCommitsCommitProp
Daniel Mack237361.94%916.36%
Takashi Iwai95524.93%2545.45%
Oliver Neukum1604.18%35.45%
Clemens Ladisch1503.92%35.45%
Paul Zimmerman842.19%11.82%
Adam Goode340.89%11.82%
Eldad Zack320.84%23.64%
Kazuki Oikawa100.26%11.82%
Randy Dunlap100.26%11.82%
Thomas Pfaff80.21%23.64%
Paul Gortmaker30.08%11.82%
Thomas Pugliese30.08%11.82%
Alan Stern30.08%11.82%
Pavel Roskin20.05%23.64%
Sachin Kamat20.05%11.82%
Rusty Russell20.05%11.82%
Total3831100.00%55100.00%
Directory: sound/usb
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